Orgilus exilis Muesebeck 1970

Oreg.

Orgilus exilis

In its very slender femora this species resembles femoralis, but otherwise it is very different. The face is relatively much narrower, the ovipositor is considerably shorter, the dorsal keels of the first tergite are lacking, the second tergite is relatively broader, and the tegulae are black.

FEMALE.—Length 3 mm. Head distinctly wider than thorax, in dorsal view 1.8 times as wide as long; face barely wider than eye height (in ratio of 60:57) and very shiny, a little rugulose just below antennae but largely weakly punctate; clypeus with only a few very weak minute punctures; malar space virtually half as long as eye height (in ratio of 28:57), granulose and dull; cheeks shagreened and subopaque; temples 0.6 as wide as eye, smooth and polished; ocellocular line a little more than twice as long as diameter of an ocellus; antenna of holotype 28-segmented, some of the segments in the apical third at least as broad as long.

Mesoscutum very shiny, but lateral lobes, as well as median lobe, covered with very shallow punctures; disc of scutellum smooth and shiny; propodeum finely rugulose, the stubs of carinae arising from the posterior margin rather prominent and long, at least the two median ones which define the median apical area; side of pronotum rugulose in the impression, narrowly smooth along upper margin and nearly smooth and very shiny on the area in front of the impression; mesopleuron smooth and polished, the longitudinal furrow foveolate; metapleuron smooth and very shiny on at least the anterior half, finely rugulose posteriorly. Hind coxa largely smooth and shiny but with a little weak sculpture basally above and on outer side; hind femur twice as long as hind coxa and virtually six times as long as wide; inner calcarium of hind tibia slightly more than half as long as metatarsus; tarsal claws simple. Stigma slightly longer than radial cell on wing margin; nervulus postfurcal by nearly half its length; hind wing 4.5 times as long as wide; lower abscissa of basella much longer than nervellus but less than half as long as mediella or maximum width of hind wing.

Abdomen slender, much narrower than thorax; first tergite 1.25 times as long as wide at apex, the spiracles three times as far from apex as from base, basal part of the tergite completely smooth and polished, with no suggestion of the dorsal keels, the tergite also narrowly smooth and polished across apex, the area between these polished bands finely longitudinally rugulose; second tergite parallel-sided, a little broader at base than long (in ratio of 70:60), smooth and polished with only a little faint sculpture medially at base; the following tergites smooth and polished, the suture between second and third tergites faint; ovipositor sheath slightly longer than propodeum and abdomen combined.

Black; clypeus entirely black; antennae dark brown; tegulae black, wing bases piceous; wings hyaline, radiella and cubitella of hind wings not at all pigmented; legs brownish yellow; hind coxae blackish at bases, hind tibiae slightly darkened apically, and the tarsi also darkened; abdomen black above and below.

MALE.—Unknown.

HOLOTYPE.—In the collection of R. D. Shenefelt, University of Wisconsin.

DISTRIBUTION.—Known only from the holotype female collected 15 June 1938, near Dufur, Oregon, by K. Gray and J. Schuh.