Orgilus momphae Muesebeck 1970

N. Y., Pa., N. J., Va., Ont., Mich., Ohio, Minn.

Orgilus momphae

This species is very similar to gelechiae (Ashmead) and coleophorae, new species, but it differs significantly from both in the form of the tarsal claw, which has a prominent subbasal tooth.

FEMALE.—Length around 3.5 mm. Head not or barely wider than thorax and in dorsal view about 0.6 as long as wide; face clearly wider than eye height, and, together with the clypeus, closely punctate on a shagreened and rather mat surface; anterior tentorial pits on a line with lower eye margins; malar space less than one-third as long as eye height; cheeks and temples shagreened and more or less mat; temples at mideye point about half as wide as eyes; frons and vertex finely granulose and dull; the carinate occipital margin sharp at the sides, broadly interrupted medially above; ocellocular line three times as long as diameter of an ocellus; antennae usually 33- to 36-segmented (36-segmented in the holotype), even the shortest segments in apical third of the flagellum clearly longer than broad.

Mesoscutum finely granulose or shagreened; notauli sharply impressed and meeting just before apex of scutum; disc of scutellum flattened and weakly shagreened; propodeum finely rugulose except at base where it is granulose or shagreened; side of pronotum, and the mesopleuron and metapleuron shagreened; longitudinal furrow of mesopleuron very weak but usually distinct and with some poorly defined foveolae. Hind coxae shagreened, elongate, three-fourths as long as hind femora, the latter just about four times as long as wide; inner calcarium of hind tibia less than half as long as the metatarsus; tarsal claw with a prominent subbasal tooth. Radial cell on wing margin slightly longer than stigma, the latter emitting radius well beyond the middle; second abscissa of radius nearly on a line with intercubitus; cubitus ending at intercubitus, not even a punctiform spur of a third abscissa present; nervulus usually interstitial; hind wing usually about six times as long as wide; lower abscissa of basella twice as long as upper abscissa, at least half as long as mediella and more than half as long as maximum width of hind wing.

Abdomen about as broad as thorax, all tergites contiguously, in part confluently, punctate; the first nearly as broad at apex as long, its dorsal keels well developed and extending about to the middle of the tergite; seccond and following tergites strongly transverse; the second suture sharply impressed; ovipositor sheath a little shorter than the abdomen.

Yellow or brownish yellow; head largely or entirely black; antennae darkened, becoming blackish apically; thorax often varied with black, especially on the mesonotal lobes, propodeum and pleura, rarely almost entirely blackish except the pronotum, which is always pale; abdomen ranging from entirely yellowish to brownish yellow with a large blackish or piceous area on each tergite; legs pale, apices of hind femora and tibiae and all the tarsi darkened.

MALE.—Essentially like the female although the abdominal sculpture may be somewhat weaker, especially on the apical tergites.

HOLOTYPE.—USNM 70182.

DISTRIBUTION.—The type-series comprises the following: 3 females (one the holotype) and 1 male from Ottawa County, Ohio, 1 female from Montgomery County, Ohio, and 1 female from Summit County, Ohio, all reared in June or July 1937, by R. B. Neiswander from Mompha eloisella Clemens, the holotype on 11 July; and the following additional material from the same host: 2 females and 3 males, St. David’s, Ontario, 1933, G. G. Dustan; 1 female, New Brunswick, New Jersey, 1931, and 4 females and 2 males, Moorestown, New Jersey, 1933. Other paratypes include 2 females from primrose, Wayne County, Ohio, 16 May 1938; 2 females and 3 males, Progress, Pennsylvania, April and May 1909; 1 female and 1 male, Ithaca, New York; 1 female from primrose, Summit County, Ohio, July 1936; 1 female, Cold Spring Harbor, Long Island, New York, and 1 female from chicory, Pittsylvania County, Virginia, 1930.