Orgilus cinctus Muesebeck 1970

Mass., N. Y.

Orgilus cinctus

This species is exceedingly like fictus in structure, but the second tergite is relatively longer and the propodeum is smoother at the base; in color it differs strikingly, at least in the female, in having the apex of the first tergite and all the second and third tergites yellow.

FEMALE.—Length about 3.2 mm. Head not wider than thorax, deeply excavated behind, in dorsal view 0.75 as long as wide; straight-line width of face a little shorter than eye height; face weakly and minutely punctate on a shagreened surface; malar space about 0.3 as long as eye height; the anterior tentorial pits only very slightly below level of lower eye margins; cheeks and temples smooth and polished, the latter not receding and about 0.75 as wide as eyes; frons smooth medially, shagreened laterally; occiput carinately margined only at the sides; ocellocular line 1.5 times as long as diameter of an ocellus; antennae of holotype 33-segmented, even the shortest flagellar segments distinctly longer than broad.

Thorax slender; mesonotal lobes shiny, not distinctly punctate; notauli sharply and deeply impressed, finely foveolate; propodeum largely smooth at base, elsewhere finely rugulose; side of pronotum finely rugulose, mesopleuron smooth and polished, the longitudinal furrow strongly foveolate; metapleuron largely very finely coriaceous, rugose at the posterior margin. Hind coxa finely shagreened, about 0.6 as long as hind femur, the latter about 4 times as long as broad; inner calcarium of hind tibia a little more than half as long as metatarsus; tarsal claws simple. Radial cell on wing margin barely longer than stigma; second abscissa of radius on a line with intercubitus; stub of third abscissa of cubitus subequal with second abscissa; nervulus very slightly postfurcal; hind wing very narrow, more than five times as long as wide; lower abscissa of basella much longer than nervellus and at least half as long as mediella or as maximum width of hind wing.

Abdomen with first tergite about 1.5 times as long as wide at apex, smooth and polished medially toward base, finely rugulose or granulose beyond; second tergite very nearly or quite as long as broad at base, largely finely granulose but very narrowly smooth at apex; third tergite with a little confluent punctation near base, otherwise smooth and shiny like the following tergites; ovipositor sheath about as long as distance from base of scutellum to end of abdomen.

Head and thorax black; antennae yellow brown, darker apically; palpi piceous; mandibles yellow; legs yellow, hind femora apically and hind tibiae basally and apically a little darkened and all tarsi dark; tegulae and wing bases yellow; wings very weakly infumated; abdomen black or blackish at base and at apex, the apical part of the first tergite, all of the second tergite and most of the third reddish yellow.

MALE.—Unknown.

HOLOTYPE.—USNM 70146.

DISTRIBUTION.—Known only from the holotype female from Wolcott, New York, 18 May 1955, N. Neunzig, and a female paratype from Holliston, Massachusetts, 2 August, N. Banks. A male from Lyme, Connecticut, which is in the United States National Museum collection, may be this species, but more material will be needed for definite identification.

Orgilus citus, new. species

Although this species is very close to gracilis (Brues), it seems to be distinct. The second tergite is almost completely smooth and very shiny, and the hind coxae are usually much darker. In addition, the face is more completely shagreened and rather mat, the first tergite has the spiracles farther from the base and has distinct, although weak, dorsal keels extending to beyond the spiracles, and the lower abscissa of basella is relatively longer.

FEMALE.—Length about 3 mm. Head in dorsal view about 0.6 as long as wide; face not, or barely, wider than eye height, minutely shagreened and rather mat; malar space just about as long as clypeus and about 0.43 as long as eye height, shagreened and mat; cheeks very shiny, shagreened and mat only near lower margins, the upper part a little alutaceous; temples about 0.75 as wide as eyes, receding, smooth and polished except narrowly along occipital carina where they are weakly shagreened; occiput carinately margined only at the sides; vertex usually a little shagreened laterally; ocellocular line 2.5 times as long as diameter of an ocellus; antennae 27- to 29-segmented in the available specimens, some segments in apical fourth of flagellum as wide as long.

Mesoscutum shiny, the middle lobe with some very weak punctures; notauli sharply impressed, very fine, and finely foveolate; propodeum more or less rugulose on a granulose ground, the stubs of the longitudinal carinae that arise from the posterior margin rather prominent; side of pronotum finely granulose anteriorly, rugulose in the impression; mesopleuron smooth and polished, the longitudinal furrow complete and foveolate; metapleuron granulose and mat, rugulose at the lower posterior margin. Hind coxa finely granulose or shagreened above and on outer side; hind femur barely twice as long as hind coxa but nearly five times as long as broad; inner calcarium of hind tibia more than half as long as metatarsus; tarsal claws simple. Radial cell on wing margin as long as stigma; second abscissa of radius on a line with intercubitus; stub of third abscissa of cubitus fully as long as second abscissa; nervulus just postfurcal; hind wing five times as long as wide, the anterior and posterior margins virtually parallel; lower abscissa of nervellus nearly or quite half as long as mediella or maximum width of hind wing.

First abdominal tergite finely rugulose punctate, very delicately shagreened and shining at base, about 1.4 times as long as broad at apex, the spiracles at end of basal third, the dorsal keels weak but distinct to beyond the spiracles; second tergite just about as long as broad at base, and broadening a little caudad, smooth and polished, only a little alutaceous or faintly shargreened basally; remainder of abdomen smooth and polished; ovipositor sheath barely as long as propodeum and abdomen combined.

Black; mandibles and lower half of clypeus testaceous; antennae yellow on basal half, darkened apically, the scapes darkened above; legs yellow, but the hind coxae usually black except at the apices, occasionally largely testaceous, hind femora on inner side and above, hind tibiae apically, and all the tarsi a little darkened; tegulae and wing bases yellow; wings a little smoky, especially apically.

MALE.—A little more shiny than the female, and the antennae darker and a little more slender.

HOLOTYPE.—In the Canadian National Collections.

DISTRIBUTION.—Known only from the type-series which consists of the following: 3 females and 1 male from Parke Reserve, Kamouraska County, Quebec, 950 feet, collected by W. R. M. Mason, the holotype female and 1 male paratype on 9 August 1957, the 2 paratype females on 7 August and 13 August 1957; 2 paratype males taken at Biscotasing, Ontario, July 1930, by K. E. Schedl; and 1 paratype male collected at Madoc, Ontario, 24 July 1952, and 1 paratype female taken at Chatterton, Ontario, 22 July 1951, both by J. C. Martin.