Orgilus clivicola Muesebeck 1970

Colo.

Orgilus clivicola

Superficially this species closely resembles compactus, new species, but it differs in the color of the abdomen and legs, in the rather flat mesoscutum and disc of scutellum, more slender antennae and shagreened cheeks.

FEMALE.—Length 3.3 mm. Head not wider than thorax, in dorsal view 0.6 as long as broad. Face at narrowest hardly wider than eye height, rather strongly convex, largely finely punctate but a little rugulose just below antennae; malar space longer than clypeus and 0.47 as long as eye height, shagreened; cheeks shagreened; temples at mideye point 0.8 as wide as eyes, largely smooth and polished but weakly shagreened along occipital carina, which is broadly interrupted medially; ocellocular line hardly twice as long as diameter of an ocellus; antennae of holotype 27-segmented, none of the segments quite as broad as long.

Mesoscutum rather flat, smooth and shiny, without distinct punctures; notauli very shallow but finely foveolate, a few confluent punctures at the junction of the notauli; scutellar sulcus deep and long, strongly foveate; disc of scutellum flat, smooth and polished, impunctate; propodeum strongly convex, largely rugulose but with a fairly large smooth and polished area each side at extreme base and rather smooth in the apical areas, which are defined by very short stubs of longitudinal carinae that arise from the posterior margin; side of pronotum rather strongly rugulose over most of its surface; mesopleuron smooth and polished, the longitudinal furrow nearly straight and evenly foveolate; metapleuron smooth and shiny except posteriorly where it is rugulose punctate. Hind coxa finely rugulose above toward base and on outer side; hind femur a little less than twice as long as hind coxa and about 4.3 times as long as broad; inner calcarium of hind tibia fully half as long as metatarsus; tarsal claws simple. Radial cell on wing margin not quite as long as stigma; second abscissa of radius on a line with intercubitus; stub of third abscissa of cubitus as long as second abscissa; nervulus clearly postfurcal; hind wing about 4.3 times as long as wide; lower abscissa of basella longer than nervellus but less than half as long as mediella or maximum width of hind wing.

Abdomen stout and short; first tergite nearly 0.9 as broad at apex as long; finely rugulose across the middle part, smooth and shiny at base before spiracles and narrowly so at apex, the spiracles twice as far from each other as from base and more than twice as far from apex as from base; the dorsal keels of first tergite not developed; second tergite 1.5 times as broad at base as long, finely rugulose on a basal median area that extends beyond the middle of the tergite on the median line, smooth and polished elsewhere; the second suture very faint; third tergite much shorter than second, smooth and polished but with a small, transverse, confluently punctate area near base; segments beyond the fourth largely retracted; ovipositor sheath just about as long as abdomen.

Blackish brown; the abdomen a little lighter than head and thorax, especially on the margins of the first tergite; antennae brown, paler basally, gradually darkening apically; palpi piceous; clypeus except at the extreme base and the mandibles reddish yellow; legs testaceous, the hind femora completely so, the tarsi somewhat darkened; tegulae and wing bases piceous; wing subhyaline.

MALE.—Unknown.

HOLOTYPE.—USNM 70147.

DISTRIBUTION.—Known only from the holotype female collected at Colorado Springs, Colorado, 5915 feet, in August, by E. S. Tucker.