Bucculatrix callistricha Braun 1963

Bucculatrix callistricha new species Face silvery white, tuft reddish brown, on vertex centrally dark brown; eyecaps silvery white, antennal stalk dark fuscous, apical 8 or 10 segments silvery white. Thorax dark brown, tegulae silvery white. Fore wings (fig. 17) dark brown, almost black, with brilliant silvery marks ; a short silvery dash in fold at base ; base of dorsal margin narrowly silvery ; from basal fourth of costa an oblique silvery streak to middle of wing; a little posterior to the costal streak, an oblique silvery streak from dorsum to fold, followed by a patch of black raised scales, the two streaks not meeting; an oblique silvery streak from middle of costa, and another more slender streak from three-fourths of costa; on dorsum before tornus a triangular silvery spot, anterior to the third costal streak; a transverse silvery mark immediately before apex, and following it at the extreme apex, a small group of black scales which project slightly into the cilia beyond the line of black-tipped scales which extend from costa around apex to tornus ; cilia fulvous, becoming fuscous toward tornus. Hind wings and cilia dark fuscous, with slight reddish tinge. Fore and middle legs dark fuscous, hind legs silvery outwardly, tibiae with fuscous hairs, tips of tarsal segments pale. Underside of abdomen silvery gray, fuscous above in male, paler in female with anal tuft pale ocherous.
Alar expanse 7 mm.
Male genitalia (figs. 214, 214a). Harpes typical of the section, setose on outer surface, with apical margin indistinctly angled by a slight projection, basal process present; socii slightly incurved, setose, tegumen projecting in a small median lobe; aedeagus short, stout, abruptly pointed, its tip directed dorsad; vinculum a very narrow band. Scale sac (fig. 214a) small (compare with that of fugitans, fig. 211a, drawn to the same scale). Female genitalia (figs. 213, 213a). Apophyses long; posterior margins of segment 7 fringed with long specialized scales; on intersegmental membrane ventral to ostium, an arc of closely placed short specialized scales ; on dorsal anterior margin of segment 8, a very short row of small specialized scales; dorsal margin of ostium sclerotized and produced laterally into long acuminate points ; ductus bursae very short, entering bursa copulatrix near anterior margin of segment 7; bursa extending to anterior margin of segment 3; signum in segment 6, ribs with paired short spines, longer and more strongly sclerotized toward anterior end.
Type. — $, Beaver Pond, Adams County, Ohio, rearing record B.2193 (on leaves of Corylus americana Walt.), imago April 30, 1954 (A. F. Braun) [A.F.B. Coll.].
Allotype. — 9 , same data as the type.
Paratypcs. — 3 $ , 5 2 , same data as the type, except dates of emergence April 25 to May 3; 1 2, Pond Lick, Scioto County, Ohio, rearing record B.2145, imago May 8, 1951 [A.F.B. Coll.] ; 6 $ , 3 9, east of London, Laurel County, Kentucky, rearing record B.1486, imagoes May 8 to May 19, 1935 [A.F.B. Coll.] ; 2 (J , 7 2, Rocky Arbor Roadside Park, Juneau County, Wisconsin, rearing record B.2173 (on leaves of Corylus cornuta Marsh.), imagoes April 3 to May 12, 1953 (A. F. Braun) [A.F.B.Coll.] ; 1 S , Lac Saguay, Quebec. 9.VI.1941 (G. S. Walley) [C.N. Coll.] ; 1 2, Dechenes, Quebec, 23.VI.1933 ( G. S. Walley) [C.N. Coll.].
The type series, except the two flown specimens from Quebec, was reared on leaves of Corylus americana Walt, and C. cornuta Marsh. The egg (fig. 37) is placed on the upper side of the leaf over a vein as in B. jugitans; it is broadly oval in outline, tapering but very slightly to the micropylar end and is marked with minute hexagonal reticulations. The very slender thread-like mines, similar to those of B. jugitans, but longer, are not distinguishable in the field from those of jugitans except by the dates when they are occupied by mining larvae. Feeding habits are identical with those of B. jugitans; the mature larva, though similarly colored, is more hairy. Cocoon similar to that of B. jugitans.
The larvae are actively feeding in the mines in the latter part of July; at this time the leaf immediately adjacent to the early part of the mine is blackened, suggesting that there has been a considerable time interval between feeding in the early and late parts of the mine, and that feeding has recently been resumed. The feeding period is spread over a month or six weeks, as observed for the Ohio specimens ; the
earliest date of cocoon spinning was August 4 ; feeding larvae have been collected as late as September 6. The larvae of the Wisconsin series were collected September 4 ; September 7 the date of the first cocoon. The imagoes emerge in late April and early May of the following year. The species is apparently single-brooded.
Buccidatrix callistricha is separated from the allied B. fugitans by the silvery white tegulae and silvery marks at base of fore wing, the pair of oblique silvery streaks at basal fourth, in contrast to the transverse complete fascia of fugitans. Genitalia of the two species differ only in minor details.

Bucculatrix callistricha is a moth in the family Bucculatricidae. It is found in North America, where it has been recorded from Ohio, Kentucky, Maine, Wisconsin and Quebec. It was first described by Annette Frances Braun in 1963.

The wingspan is about 7 mm. The forewings are dark brown, almost black, with brilliant silvery marks. The hindwings are dark fuscous, with a slight reddish tinge. Adults have been recorded on wing from April to May and from July to August.

The larvae feed on Corylus americana and Corylus cornuta. They mine the leaves of their host plant. The mine is slender and thread-like.