Orgilus imitator Muesebeck 1970

Tex., Oreg., Calif.; Mexico.

Orgilus imitator

This form closely resembles disparilis, new species, but it is much smoother and more shiny, and the middle lobe of the mesoscutum is very different, being unusually short and broad.

FEMALE.—Length about 3.8 mm. Head slightly wider than thorax, in dorsal view fully twice as broad as long; face about 0.75 as wide as eye height; eyes very large; anterior tentorial pits above level of lower eye margins; malar space not more than one-sixth as long as eye height, finely granulose and mat like the cheeks; temples largely smooth and shiny, sharply receding and barely one-third as wide as eyes; occipital carina complete but weak; vertex smooth and shiny; ocellocular line slightly longer than the maximum diameter of an ocellus; antennae 32-segmented in the holotype, 34-segmented in the only other known female, even the shortest segments of the flagellum decidedly longer than broad, the apical segment with a short terminal spicule.

Mesoscutum smooth and shiny, with only minute and extremely shallow setigerous punctures; notauli fine, shallow, weakly foveolate and short, fading out near middle of scutum, and the median lobe unusually short, extending only to the middle of the scutum; disc of scutellum rather large, smooth and shiny, the scutellar sulcus minutely foveolate; propodeum largely smooth and shiny with only a little very weak roughening medially; side of pronotum entirely smooth and polished; mesopleuron and metapleuron also smooth and polished, the longitudinal furrow of mesopleuron very fine, sinuate, and minutely foveolate. Hind coxa smooth; hind femur somewhat less than five times as long as broad; inner calcarium of hind tibia hardly half as long as metatarsus; tarsal claw without a subbasal tooth or angulation. Radial cell on wing margin about 1.3 times as long as stigma; second abscissa of radius not nearly on a line with intercubitus; spur of third abscissa of cubitus less than half as long as second abscissa; nervulus clearly postfurcal; hind wing barely four times as long as wide; lower abscissa of basella hardly as long as nervellus and much less than half as long as mediella.

Abdomen a little narrower than thorax; first tergite 1.5 times as long as broad at apex, nearly smooth, with only a little faint shagreening; second tergite 1.5 times as broad at base as long, faintly shagreened; the following tergites smooth and shiny; ovipositor sheath about as long as distance from tegulae to end of abdomen.

Brownish yellow; in the holotype with broad blackish markings on the mesonotal lobes and the upper anterior angle of the mesopleuron blackish; metanotum and propodeum black; abdomen more or less darkened basally and apically; palpi pale yellow; antennae brownish yellow, darker apically; tegulae and wing bases yellow; legs testaceous, apex of hind femur darkened, also the hind tibia except for a conspicuous pale annulus at extreme base, and the hind tarsus; wings hyaline, iridescent

MALE.—Essentially like the female, but the antennae are 31-segmented and the flagellum is dark brown.

HOLOTYPE.—USNM 70168.

DISTRIBUTION.—Known only from the short type-series, which consists of the holotype female captured at light at Deep Canyon, Riverside County, California, 23 November 1964, by M. E. Irwin; a paratype female taken at Portland, Oregon, 18 September 1897, by A. P. Morse; and a paratype male obtained from “webbing of Gnorimoschema” at Presidio, Texas, 13 December 1943.