dcsimg

Comprehensive Description

provided by Memoirs of the American Entomological Society
Rhagio vertebratus Say (PI. II, fig. 13)
1823. Leptis vertebrata Say, Jour. Acad. Nat. Sci. Phila., in, p. 38. No. 8.
1861. Leptis hirta Loew. Berlin. Ent. Zeitschr., v, p. 318, no. 21.
1861. Leptis scapularis Loew, Bed. Ent. Zeitschr., v, p. 318, no. 22
1908. Rhagio hirtns Kertesz, Cat. Dip., m, p. 305.
1908. Rhagio scapularis Kertesz, Cat. Dip., in, p. 310.
1908. Rhagio vertebratus Kertesz, Cat. Dip., m, p. 314. Thorax blackish in male, usually yellowish in female; abdomen yellowish, variously marked with blackish somewhat as follows: broadly banded with black; with a median row of spots basad, bands apicad ; spots extended laterally to form bands ; basal two or three segments sometimes unmarked; legs yellowish, the tarsi, a ring near apex of front femora, and apex of hind femora and tibiae usually blackish; wings nearly hyaline, stigma usually distinct.
Male. — Length, 7 to 10.5 mm. Head: Frontal triangle blackish in ground color, light gray to whitish pruinose; sides of face with moderately long and fairly abundant whitish hairs; proboscis and palpi dark brownish thru brownish to yellowish, the latter with fairly long and abundant whitish hairs; antennae with first two segments and arista blackish, the third yellowish and with often the tip of the second the same color, occasionally the third segment wholly or all except the base blackish.
Thorax: Blackish in ground color; mesonotum slightly so on disc but nevertheless lightly grayish pruinose, in the better preserved specimens usually with light gray pruinosity as two stripes and sometimes a third faint one on median line between these, the lateral borders broadly and when viewed from the front the hind border before scutellum also; hairs black, short on disc, somewhat longer and thicker on sides; humeral calli pale grayish; scutellum brownish yellow, usually darker along cephalic border; hairs moderately long and thick; pleura grayish pollinose, metanotal hairs pale.
Abdomen: Yellowish, marked with dark brownish or blackish in a variable manifer as follows: the last three segments nearly always have each a broad band extending to lateral margins and usually leaving only the narrow caudal margin yellowish; the antepenultimate band often emarginate behind or sinuate; the remaining segments fall into two more or less well defined types as follows:
(1) {vertebratus type). Each with a median somewhat rounded spot, on the first segment small and just below scutellum or the segment may be nearly all black, sinuate behind and broadly reaching caudal margin on either side; the spots on segments two to four successively larger, sometimes extended laterad along cephalic border to form a partial band which on segment four often reaches the lateral margin ; lateral margins narrowly edged with black.
(2) {hirtus type). First segment immaculate, segments 2-4 with broad basal bands rather than spots, although segment two is often immaculate also or the band may not reach the lateral borders or may even be further reduced to a quadrate spot; hairs moderately long and thick, more erect, longer and pale on sides; venter yellow, last three segments black.
Legs: Blackish, gray pollinose or the front pair pale yellowish, front pair sometimes intermediate in color and middle and hind pairs sometimes partly tinged with brownish yellow, hairs pale; femora yellowish, hind pair usually with apical third or half blackish, front pair often with a more or less distinct blackish ring near apex; tibiae yellowish, hind pair dirty yellowish, to brownish usually darker
towards apex; tarsi infuscated, metatarsus of first two pairs usually lighter except on tip.
Wings: Veins brownish; membrane very faintly tinged with grayish, slightly more pronounced on apex, along costal border yellowish; stigma elongate, pale to dark brownish.
Female. — Length, 7 to 9 mm. Similar to male except as follows: Head: front blackish in ground color, satiny whitish pruinose; antennae except arista, wholly yellowish, with first two segments or first segment only, brownish or blackish.
Thorax: More or less brownish on disc, broadly pale yellowish on lateral and often on posterior margins, as in male, sometimes two faint median yellowish vittae apparent; pleura yellowish to a somewhat variegated brownish and yellowish, the lighter color mostly confined to the region below the wing attachment, somewhat grayish pollinose.
Abdomen: Usually immaculate on first segment, sometimes with a subquadrate spot, remaining segments usually broadly banded with black (sometimes brownish) much as in hirta type of male but on anterior segments usually more nearly complete, bands sometimes emarginate caudad on one or more segments near the apex.
Legs: Front coxae pale yellowish, middle and hind pairs concolorous, to brownish, or variegated brownish and yellowish, often light gray to whitish pruinose; legs otherwise as in male.
Specimens Examined: About 428 males and females.
New Brunswick: i <?, Newcastle, July 16, 1915, (A. B. Baird), [New Brunswick Dept. Agr.].
Nova Scotia: 2 9 , West River, July 23, 1913, [C. U.].
Quebec: i d i 9, Outremont, August; 7 d 7 9, Joliette, July, 1916; 3 6* 1 , 3 9, St. Hilaire, June 22, 1919; 1 d Rigaud, July 5, 1920; 1 d Lauzon, July 4, 1919; 1 9, Montreal, June, (all Ouellet), [all Ouellet]. 2 rf 1 , [A. N. S. P.], 1 9, Vaudreuil County, [Kansas]. 1 9, Aylmer, July 31, 1926; 1 d Aug. 3, 1926; 1 d Wakefield, August 2, 1927, (F. P. Ide); 1 9, Cascades, July 11, 1920, (H. J. Crawford), [all C. N. M.].*
Ontario: 2 d Burlington, June, 1919, (H. C. Huckett), [Leonard]. 1 9, Severn River, August 4, 1913, (H. C. Huckett), [Ont. Agr. College]. 1 9 , Ottawa, June 30, 1912, (E. P. Van Duzee), [Van Duzee]. 1 <?, Ridgeway, July 15, 1917, (M. C. Van Duzee), [Van Duzee]. 1 d 1 9, Bruvelle, July 7, 9, 1913, (W. A. Ross); 1 9, Ottawa, July 16, 1913; 1 9, Aug. 4, 1912, (J. I. Beaulne); several tf and 9, Jordan, July, (W. A. Ross); several d> and 9, Bowmanville, July, (W. A. Ross); 1 9, Orillia, July 30, 1924, (H. L. Viereck); 1 9, Strathroy, July 1, 1925, (H. F. Hudson), [all C. N. M.].
Maine: 4 d Capens, July 11, 14, 17, 19, 1907; 2 9, July 16, 1907, [B. S. N. H.].
New Hampshire: i tf, i 9, Franconia, [B. S. N. H.]; 4 d [A. M. N. H., ex Slosson]; 2 d 2 9 , (A. T. Slosson), 1 9, (Morrison); 2 <?, July 10, 17, 1915, (C. H. T. Townsend), [U. S. N. M.]. 2 d Glen House, July 26, 1916, [B. S. N. HJ.
* Recorded from Rigaud, Montreal, East Bolton, and Quebec by Chagnon in List Dip. Quebec. 1 d Hanover, July 3, [B. S. N. H.]. 2 d Milford, July 23, 1914, [B. S. N. H.].
1 9, Mount Washington, July 28, 1915, [B. S. N. H.]. 3 o", [A. M. N. H., ex Slosson]. 1 d Mount Washington; 2 9, White Mountains, (one collected by Morrison), [U. S. N. M.]. 8 d Mt. Washington, 2250 ft., July 24 to 25, 1912, [Johnson].
Vermont: i 9, Burlington, July 24, 1906, [B. S. N. H.]. 1 d 2 9, Mount Ascutney, July 11, 1908; 1 d July 23, 1912, [B. S. N. H.]. 1 d Stratton, (P. W. Whiting), [B. S. N. HJ.
Massachusetts: i d Chester, Aug. 5, 1 d Aug. 4, 1911; 2 9, July 4, 1911; 3 9, July 26, 1913; 4 d Babish Falls, June 27, 1912; 1 d July 26, 1912; 1 9, June 28, 1912; 1 9, Mount Greylock, August 8, 1907; 2 d Great Barrington, June 15, 16, 1915, [all B. S. N. H.]. 2 d Cummington, July 2-5, 1899, [U. S. N. M.].
2 9 , Cheshire, July 21, 1912, [Johnson]. 1 o", New Lenox, July 24, 1912, [Johnson]. Connecticut: i d" , Norfolk, Julv 13, 1915, (M. P. Zappe), [Conn. Agr. Exp.
Sta.]. 60
New York: i d Upper Ausable Lake, July 30, 1920, (J. Bequaert), [A. M. N. H.]. 1 9, pond at foot of Mount Redfield, July 25, 1920, (J. Bequaert), [A. M. N. H.]. 1 d Chazy Lake, June 28, 1913, [N. Y. S. M.]. 1 d Onteora Mountain, Greene County, 2500 ft., July II, 1897 (L. O. Howard), [U. S. N. M.]. 1 9 , Newport, July 8, 1905 (D. B. Young), [N. Y. S. M.]. Adirondack Lodge, July (M. D. Leonard), [N. Y. S. M.]. Augur Flats, July, (D. B. Young), [N. Y. S. M.]; 2 o Hamburg, June 21, 1908 and June 20, 1909, (M. C. Van Duzee), [Leonard, ex Van Duzee]. 1 d East Aurora, June 15, 1918; 1 9, July 8, 1909, (M. C. Van Duzee), [Van Duzee]. 2 9 , Colden, July 3, 1910, (M. C. Van Duzee), [Van Duzee].
1 9, Protection, July 18, 1915, (M. C. Van Duzee), [Van Duzee]. 1 d Gowanda, June 27, 1909, (M. C. Van Duzee), [Van Duzee]. 1 9, Niagara Falls, July 31, 1910, [C. U.]. 1 d Little Valley, June 10, 1912; 1 9, June 30, 1912, (M. C. Van Duzee), [Van Duzee]. Sacandaga River, Fulton County, June 27, 1910, (C. P. Alexander), [C. U.]. 1 d 1 9, Woodworth's Lake, Fulton County, (C. P. Alexander), [C. U.]. 9 d 1 9 , McLean, July 3, 1920, (M. D. Leonard), [Leonard]. 1 cf, Ithaca, July 8, 1916, (R. C. Smith), [Kansas]; 1 9, June 25, 1890, [C. U.]; 4 9, July 1 to 7, [Banks]; 1 9 , July 19, 1897, (C. M. Reynolds), [C. UJ. 3 d Catskill Mrs., June 25, 1904 and August 1 , 8, 1904, [A. N. S. P.]. 1 9 , Stony Clove, Catskill Mountains, July 1910, [A. N. S. P.], 1 <?, Staten Island, June 7, (Wm. T. Davis), [Davis].
New Jersey: 51
Pennsylvania: i 9, East Bolton, July 23, 191 1, (A. F. Winn), [C. N. M.].
2 d", Castle Rock, June 16, 190 1 ; 1 <?, June 1, 1902:1 d June 8, 1904; 1 9, June 5, 1910, (Harbeck), [U. S. N. M., ex Aldrich]; 1 d June 10, 1905; 1 9, June 7, 1906, (C. T. Greene), [Pa. Dept. Agr., ex. Daecke]; 7 d 7 9, June 3, 1906, to
50 Recorded by Johnson (1925: 105) from the Litchfield "Area" and as occurring also in the rest of the State.
51 Recorded in Smith's List Ins. N. J., ed. 3, p. 743, (1910), from Dunfield, Delaware Water Gap, as hirla.
June 4, 1911, [A. N. S. P.]. 1 9 , Roxboro, June 12, 1909, (C. T. Greene), [Banks]; 2 d% June 3, 1909, [Hine]; 1 9, June 29, 1908, (C. T. Green), [Pa. Dept. Agr.];
1 d May 31, 1908, [A. M. N. H., ex Bequaert; as hirta], 1 9, June 7, 1908, (Harbeck), [U. S. N. M., ex Aldrich]. 2 <?, 1 9 , Roxboro, May 31 and June 20, 1908, (F. Haimbach), [A. N. S. P., ex Haimbach]. 1 9, Delaware Water Gap, July 1, [A. M. N. H., ex Slosson]. 2 9 , Philadelphia, July 6, 1891, [one Leonard, and one U. S. N. M.]; 2 9 , June 18, 1890; 1 d June 10, 1906, (F. Haimbach), [A. N. S. P.];
2 d June 18, 1895 [C. U.]. 1 9, Linglestown, July 4, 1919, [Johnson]. 2 d Hummelstown, June 5, 1912; 1 d June 6, 1912; 1 d June 10, 1917; 1 d June 7, 1912, (all J. N. Knull), [Pa. Dept. Agr.]. 1 9 , Germantown, Philadelphia, May 4, 1905; 1 9, Swarthmore, Delaware County, June 19, 1910, (E. T. Cresson, Jr.), [A. N. S. P.]. 5 d Harrisburg, June 7 to 24, and July 4529, June 12; 1 9 , July 6, (W. R. Walton), [U. S. N. M., ex Walton]; 1 9, June 17, (A. B. Champlain), [U. S. N. M., ex Walton]; 1 d July 7, 1910, (H. B. Kirk), [Pa. Dept. Agr.]. 1 J>, Perdix, June 8, 1913, [Pa. Dept. Agr., ex. Daecke]. 1 d Enola, June 7, 1909, [Pa. Dept. Agr., ex Daecke]; 1 d June, (W. R. Walton), [U. S. N. M., ex Walton].
1 d Inglenook, June 4, 191 1, [Pa. Dept. Agr., ex Daecke]; 1 d June 8, 191 1, (H. B. Kirk), [Pa. Dept. Agr., ex Daecke]. 1 9, Glenolden, June 13, 1906, (Dr. Castle), [Pa. Dept. Agr., ex Daecke]. 2 d New Cumberland, June 23, [U. S. N. M., ex Walton]. 2 <?, Camp Hill, May 31, 1909, (Chas. Anderson), [Pa. Dept. Agr.]. 1 cf, Allegheny, May 31, 1 891; 1 9 , July 2, 1891, [U. S. N. M., ex Aldrich].
2 cr, 1 9, Jeanette, [U. S. N. M., ex Aldrich]. 1 <?, Stoverdale, June 16, 1916, (W. S. Fisher), [U. S. N. M., Div. Forest Ins.]. 1 9 , 1 d Hazleton June 28, 1909 and July 16, 1913, (G. W. Dietz), [A. N. S. P., ex Dietz]. 1 9 , Riverview, June 18, 1912, [Pa. Dept. Agr.]. 1 d Marsh Run, June 3, 191 1, [Pa. Dept. Agr.]. 1 d
1 9 , Endeavor, June 30, 191 7, (H. B. Kirk), [Pa. Dept. Agr.].
Maryland: 4 d Plummer's Island, June 19, June 17, 1906 and August 31, 1909. (W. L. McAtee) ; 1 9 , July 7, 1909, (A. K. Fisher) ; 7 d 6 9 , May 23 to June 20, 1915 and 1916, (R. C. Shannon), [all U. S. N. M.]; 1 <?, 1 9, (in copula) June 5,
1915, (J. C. Crawford), [U. S. N. M.]; 8 d 4 9, May 19 to June 8, 1912-1916 (H. L. Viereck) and (W. L. McAtee), [Biol. Surv.]; 1 9 , June 6, 1915, (R. C. Shannon), [Shannon]. 4 d Forest Glen, May 31, 1914; 1 9, June 1, 1913, (F. Knab), District of Columbia: 52
Virginia: 12 <?, 10 9, Dead Run, Fairfax Co., May 23 to June 19, 1915, (R. C. Shannon), [U. S. N. M.]; 1 d", May 21, 1916; 1 9 , June 9, 1913, (R. C. Shannon), [Shannon]; 3 <?, 1 9, June 23, [Banks]. 2 9, near Plummer's Island, May 28,
1916, (H. L. Viereck) [Biol. Surv.]; 1 d June 4, 1916, (R. C. Shannon), [Shannon]. 6cf, Chain Bridge, May 28 and June 23, [Banks]. 1 9, Alexandria County, June 18, 1910, (W. T. Davis), [Davis]; 1 9, June 18, 1910, [A. M. N. H., ex Slosson].
2 d Dixie Landing, May 25, [U. S. N. M., ex Aldrich]. 1 9, Bluemont, June 13, 1916, (J. N. Knull), [U. S. N. M., Div. Forest Ins.; as hirta].
West Virginia: i 9 , Fairmont, June 22, 1908, (E. T. Cresson Jr.), [A. N. S. P.].
62 Recorded by Osten Sacken in Cat. Dipt. N. A., ed. 2, p. 64, (1878) from " Distr.
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bibliographic citation
Leonard, M.D. 1930. A Revision of the Dipterous Family Rhagionidae (Leptidae) in the United States and Canada. Memoirs of the American Entomological Society vol. 7. Philadelphia, USA

Comprehensive Description

provided by Memoirs of the American Entomological Society
Rhagio intermedius Walker
1848. Rhagio intermedia Walker, List Dip. Brit. Mus., 1, p. 212. 1904. Leptis intermedia Adams, Kans. Univ. Sci. Bui. II, p. 441. 1908. Rhagio intermedins Kertesz, Cat. Dip., in, p. 306.
No workers have been able to identify this species since it was first described. Walker's original description follows :
"Mas. et. fem. Fulvus, thorace fusco trivittato, pectore flavo albido, abdomine fusco quadrimaculato apice obscuriore, pedibus fulvis, alis subfulvis.
"Allied to R. tringarius and to R. immacidatus. Body tawny; head paler beneath, clothed with tawny hairs; eyes brassy; palpi, lancets and sucker tawny, the former clothed with black hairs; feelers pale ferringinous ; the bristle of the fourth joint piceous; chest tawny; thinly clothed with black hairs, and having three broad brownish stripes, which cease before they reach the scutellum; middle stripe very slightly divided; breast whitish yellow; abdomen tawny and clothed with -black hairs; each of the segments from the first to the fourth with a brown spot on its back; following segments more dull; legs tawny, clothed with tawny down: feet dull ferringinous: wings with a slight tawny tinge, especially at the base and along the fore border; veins tawny; poisers pale, tawny. Length of the body 4-5 lines [about 8-10 mm.]; of the wings 9-10 lines.
"Var. /3. Stripes on the chest very indistinct; abdomen without spots. " Male like the female; breast grayish; abdomen darker towards the tip. "a. St. Martin's Falls, Albany River, Hudson's Bay, Presented by G. Barnston Esq."
license
cc-by-nc-sa-3.0
bibliographic citation
Leonard, M.D. 1930. A Revision of the Dipterous Family Rhagionidae (Leptidae) in the United States and Canada. Memoirs of the American Entomological Society vol. 7. Philadelphia, USA