ROBBER FLIES OF THE WORLD 



585 



riorly 2 long, stout bristles on each side. Lateral 

 bristles are long and stout and consist of 2 notopleural, 



1 supraalar, with another far to the rear, 2 on the 

 postalar callosity or sometimes only one, and 1 pair of 

 long, stout, scutellar, marginal bristles. The scutellum 

 is only moderately thick, convex, -with deeply impressed 

 rim and scattered hairs on the disc and on each side 

 of the rim a row of 8 bristly hairs. Metanotal callosity 

 with a tuft of coarse pile. Pleuron poUinose, with nu- 

 merous, coarse hairs on the upper and posterior border 

 of the mesopleuron, both anterior and posterior 

 basalare, upper pteropleuron, hypopleuron, besides the 

 usual propleural pile. Pronotum with 4 pairs of 

 bristles. Postmetacoxal area membranous. Proster- 

 num with a narrow, lateral band of chitin, which joins 

 the lateral sclerites. 



Legs : The hind femur and tibia somewhat lengthened 

 and comparatively slender. The anterior 4 femora 

 stout. The legs bear a few stout bristles and abimdant, 

 fine, appressed setae which are absent on the ventral and 

 posterior surfaces of all the femora. Hind femur with 



2 lateral bristles along the middle, a stout, subapical, 

 dorsolateral bristle, another dorsomedially near the 

 apex. Ventrally on the basal half there are 2 or 3 long, 

 slender bristles and a ventromedial fringe of medium 

 long, slender bristles or bristly hairs. Hind tibia pecu- 

 liarly reduced in bristle content. It bears 1 stout 

 bristle dorsolaterally close to the base. The other ele- 

 ments present are few and are scarcely more than 

 bristly hairs. Hind basitarsus longer than the next 

 three segments. Middle femur with a quite stout, long 

 bristle anteriorly at basal and apical third, a smaller 

 bristle posteriorly at apex and on the ventral half a 

 row of 5 long, slender bristles. Middle tibia with 3 

 bristly hairs dorsally, 2 long, slender bristles postero- 

 ventrally on the oiiter half, and also 2 stout, shorter, 

 ventral bristles on the outer half. Anterior femur with 

 5 long, slender bristles or some moderately stout ele- 

 ments ventrally on the basal half. This tibia has 2 

 slender, short, posterodorsal bristles, 2 quite long, at- 

 tenuate posteroventral bristles on the outer half besides 

 rather nmnerous, fine, long hairs. The tarsal bristles 

 are quite long on the first two segments. Claws mod- 

 erately stout and sharp, curved near the apex, pulvillus 

 large ; empodium stout, except close to the apex, which 

 is finely attenuate. 



Wings: The wings are yellowish hyaline with villi on 

 the outer fourth and posterior margins. The marginal 

 cell is wide and closed with a moderately long stalk. 

 The second submarginal cell is considerably widened 

 anteriorly entirely in front of the third vein. Posterior 

 branch of the third vein with a conspicuous bend near 

 the middle. Fourth posterior cell closed and stallced, 

 the anal cell likewise. Posterior crossvein absent. The 

 anterior crossvein enters the discal cell beyond the 

 middle. The third vein forks a little beyond the discal 

 cell. Alula large ; ambient vein complete. 



Abdomen : The first segment of the abdomen is con- 

 siderably wider than the second, with a dense tuft of 

 long, fine hairs laterally and 2 or 3 bristles. Surface of 



535914 — 02— pt. 2- 



abdomen with abundant, appressed, coarse hairs in 

 the middle which are bristly or setate and form pos- 

 terior fringes. Segments with scattered, longer, erect, 

 latei-al hairs, more abundant on the second segment and 

 the posterior corners of the third to sixth segments, and 

 with distmct, stout bristles. Males with eiglit tergites ; 

 the seventh is little more than half as long as the sixth 

 and the eighth laterally is half as long as the seventh 

 and is reduced to membrane in the middle. Sternites 

 with a few, very slender bristles or bristly liairs. The 

 first sternite has numerous, long, fine hairs. Females 

 with seven segments not included in the ovipositor. 

 Male terminalia unusually large, more or less elongate 

 and club-shaped. The superior forceps are the largest 

 element ; they are apically high, broad, and quite thin, 

 deeply notched with long, stout, dorsal process; its 

 posterior border has a fringe of long, conspicuous bris- 

 tles. The large, long gonopod is lateral, with a crossed 

 pair of apical processes and a large pair of medial, up- 

 turned, microsetate pseudoclaspers. Hypandrium large, 

 but the cavity of the terminalia is widely open below, 

 with very long, upwardly curved aedeagus and valves 

 extending outside the terminalia. Female with the 

 eighth segment from the dorsal aspect broad at base, 

 only a little narrowed, only a little longer than wide 

 at base and hemicylindrical or at least strongly con- 

 vex. The short ninth segment and the somewhat longer, 

 medially creased tenth segment strongly deflected down- 

 ward. Posterior margin of the seventh tergite on the 

 outer third and whole posterior margin of the seventh 

 sternite with long, conspicuously stout bristles. 



Many of the Asiatic species now placed in Eeligmo- 

 neura Bigot probably require reassignment to Cinadus. 

 Some of these probably belong in the closely related 

 Oligoschema Becker, or Orophotus Becker or some in 

 Neomoctherus Osten Sacken. In any case Heligmo- 

 neura appears to be restricted to Etliiopia. I am un- 

 able to determine their proper location without a study 

 of all species concerned. Therefore, I place here at 

 present only those species which seem certainly to be- 

 long in this genus, Cinadus. 



See Heligmoneura Bigot for discussion of geographic 

 relationships and the need for reassignment of many 

 species. I have examined a specimen of occidentalis 

 Eicardo, in the British Museum (Natural History) 

 from the Gold Coast, which clearly belongs to Cinadus 

 as here understood, and which I removed from Helig- 

 moneura. See addendum (p. 595) for other species. 



Distribution : Ethiopian : Cinadus africanus Ricardo 

 (1919) ; occidentalis Ricardo (1925). 



Oriental : Cinadus chaetoprocta, new species ; elegans 

 Frey (1934) ; spreius Wulp (1898) ; tenuicornis Walker 

 (I860) \_=spurius Wulp (1898)]. 



CItaetogonophora, new suhgenus 

 FiGTJBE 2411 



Type of subgenus: Chaetogonophora chaetoprocta, 

 new species. 



-n 



