1921] Bequaert — Atherix hraunsi 5 



joints together. Middle tarsi distinctly shorter than their tibiae; 

 their basal joint about the length of the following three together 

 and with a feebly projecting, obtuse, apical expansion on the under 

 side. Hind tasi slightly shorter than their tibiae; their basal joint 

 very short, but a little longer than the following joint; this basal 

 joint is sliglitly thickened, cylindrical, and ends at the apex in a 

 heavy, broadly obtuse, spur-like expansion which extends on the 

 under side considerably beyond the insertion of the second tarsal 

 joint (Fig. 1&). Pulvilli and claws of the normal shape, even on 

 the fore legs, not distorted as in the male of A. ibis. Abdomen 

 short and broad, but a little longer than the thorax. Hypopygium 

 large, completely exserted ; both parts of the forceps elliptical, thick, 

 with a simple, finger-like apical appendage which is folded inward 

 to cover the apex of the penis (Fig. Ic). Wing venation (Fig. 

 Id) as in other members of the genus; the third longitudinal vein 

 forked much before the apex of the discal cell, its basal petiole 

 not half the l^ugth of the two branches; anal cell closed far from 

 the margin of the wing. 



Head and thorax dull dark In-own (nearest "mummy brown" of 

 Eidgway's color nomenclature) ; the antennae, epistoma and mouth 

 parts pale yellowish-; the posterior half of the scutellum dirty ocher 

 yellow. Abdomen, including the hypopygium, uniformly bright 

 ocher yellow. Legs dirty yellow, the coxae and tips of tarsal joints 

 slightly infuscate; the spur-like processes of basal joints of hind 

 tarsi blackish. Halteres white, with a faint yellowish tinge. 

 Wings hyaline, somewhat milky white, with a feebly marked, pale 

 brown stigma which extends between the first and second longi- 

 tudinal veins, from slightly before the anterior cross-vein to the 

 apex of the first vein; wings otherwise entirely without spots or 

 bands. 



Pubescence concolorous, short but rather abundant on head and 

 thorax; covering the entire vertex, front and side cheeks; face 

 around the antennal sockets and epistoma bare. Hairs much longer 

 and denser on the abdomen, bright yellow Avith a slight golden 

 suffusion. Upper side of the femora with long, pale pubescence; 

 the hairs of the legs otherwise short and black. No tactile hairs 

 on the fore tarsi; but on the fore femora an irregular, transverse 

 row of five long, pale colored bristles, which are placed before the 



