Enlinia acuticornis Robinson 1969

Enlinia acuticornis

MALE.—Length 1.0 mm; wing 1.2 mm by 0.5 mm. Front (Figure 173) slightly over twice as broad as high, metallic bluish, covered with brown pollen; face narrowed below, eyes essentially contiguous in lower half, anterior eye facets only slightly enlarged. Palpus and proboscis dark. Antenna (Figure 174) black, segment 3 conical, about as long as broad with arista slightly to side of acute apex, arista nearly twice as long as face.

Thorax metallic dark green above, a little more brownish on pleura, with slight pollen; setae pale brownish; about 6 pairs of small acrostichals; 5 pairs of dorsocentrals, only hind pair rather long; scutellum hind margin rather sharply rounded in middle, bristles nearer middle than sides.

Legs brownish yellow with most of forecoxa, trochanters, and sometimes most of femora paler; setae mostly dark. Fore and middle coxa with numerous hairs anteriorly; femora nearly bare below, middle femur with small erect pale seta near base; middle tibia with indistinct dorsal seta before middle; hind tibia with an indistinct dorsal seta near base and distal third, a slightly larger seta near tip. Foretarsus (Figure 175) with segments 1 and 2 compressed, 3 quite widened distally with small stout black seta posteriorly, 4 and 5 slightly flattened, lengths of segments from base as 6-4-4-3-5; middle tarsus as 9-6-5-4-5; hind tarsus as 10-8-7-5-6.

Wing (Figure 171) narrowly elliptical, hind margin evenly rounded, wing clear, veins brown; vein 2 slightly and evenly arched, curved slightly forward at tip; veins 3 and 4 essentially straight, diverging from near base; crossvein perpendicular to vein 4, two-thirds as long as last of vein 5; vein 6 represented by weak fold lying near anal margin. Knob of halter black.

Abdomen (Figure 172) about as long as thorax, cylindrical, somewhat compressed, dark, slightly dulled with blackish pollen above; sternites without auxiliary genitalia, but sternite 5 distinct and bearing numerous small dark hairs. Hypopygium small, capping tip of preabdomen, brown; bearing a pair of pale brown oval lamellae each with short rather pale marginal setae; inner appendages yellowish, short, rodlike.

FEMALE.—Similar to male, but face below as wide as antennal segment 1, face and front with brown pollen, eye facets not enlarged, antennal segment 3 conical but shorter; femora without distinctive setae below; foretarsus plain, lengths of segments from base as 6-3-2-2-5.

TYPE-DATA.—Holotype ♂ and allotype ♀ from Mexico: Chiapas, Ixtapan, wet roadside rock faces, in ravine above river, 23 May 1963, H. Robinson (USNM 70320). Paratypes: same data as holotype, 1 ♂ and 5 ♀ ; San Luis Potosi, a few km south of Tamazunchale, on partially shaded rocky ledges wet from seepage, in small ravine, 22–23 December 1961, 2 ♂; Oaxaca, above Rio Valle Nacional, shaded rocky ravine by waterfall, 12 May 1963, 1 ♂; all collected by H. Robinson.