ROBBER FLIES OF THE WORLD 



587 



Thorax: The thorax is comparatively high and 

 slightly narrowed anteriorly, and everywhere black in 

 ground color. The mesonotum is densely brown pol- 

 linose, becoming more greyish laterally and M'ith an ill- 

 defined, slightly ligliter, medial vitta. Pile of mesono- 

 tum scattered, scanty, erect, black and setate. The 

 strong, long, lateral bristles are black also. Scutellum 

 densely pale grey pollinose, with a submarginal row of 

 erect, fine, black setae in front of the crease and 1 pair 

 of stout, long, black bristles and 3 or 4 much shorter, 

 ■white hairs. There is a tiny, light brown spot poste- 

 riorly on the humerus ; whole pleuron pale greyish yel- 

 low pollinose. The slender bristles of the metapleuron 

 yellowish white with 1 or 2 black bristles ventrally and 

 with a long, black bristle and some yellow hairs on the 

 hypopleuron. 



Legs : Tlie anterior femur and tibia, the whole of the 

 middle tibia, the whole of the middle femur, except 

 the narrow black apex, and the whole of tlie hind 

 femur, except the black, apical fifth, are all brownish 

 yellow. The dorsal pile of all the femora is fine, short, 

 dense, appressed and black. Medial surface of hind 

 femur with numerous, conspicuously longer, black bris- 

 tles over the middle part, changing to yellow at the 

 base and apex. Hind femur with 2 subdorsal, black 

 bristles at the apical fifth, a lateral, black bristle at 

 the basal third, and with 1 or 2 prominent, yellow 

 bristles ventrally near the base. This femur is some- 

 what swollen gradually over the middle, with the swell- 

 ing confined to the dorsal part. Hind tibia of uniform 

 thickness, yellow on the basal half, becoming in the 

 middle diffusely black and black on the remaining half, 

 with a black, basal doi-sal bristle, another at the middle, 

 and a third near the middle placed medially. Hind 

 tarsus entirely black. Posterior surface of midferaur 

 with some bristly, yellow pile. Midfemur on the basal 

 half with 4 or 5 long, yellow bristles ventrally and other 

 yellow hairs and with 2 prominent, long, black bristles 

 anteroventrally in the middle, and with 1 stout, black, 

 posteroapical bristle. Midtibial bristles all yellow, ex- 

 cept for 1 small, black bristle in the middle dorsally. 

 Pile of the anterior and middle tibiae chiefly yellow 

 with a few, fine, scattered, black setae posterodorsally. 

 Anterior tibia with 2 small, black, dorsal bristles, 2 

 conspicuous, long, yellow, posteroventral bristles and 

 numerous, more slender, ventral, yellow bristles and 

 bristly haii-s. The anterior femur likewise has numer- 

 ous, ventral, yellow bristles and bristly hairs. First 

 segment of anterior and middle tarsi light yellow, re- 

 maining segments similarly colored but becoming black- 

 ish more extensively toward the apex ; the terminal seg- 

 ment is almost wholly black. Claws almost entirely 

 black, strongly bent at apex. Anterior and middle 

 coxae chiefly yellowish, except at the base. 



Wings : The wings are tinged with brownish yellow ; 

 the whole outer fourth has dense, blackish villi, which 

 are continued narrowly along the posterior margin to 

 the anal cell. Posterior branch of the third vein with 

 a strong bend in the middle. 



Abdomen: The abdomen is black with brownish to 

 grey pollen, the postmargin somewhat yellowish. The 

 strong, lateral posterior bristles yellowish, replaced in 

 the female toward the middle of the segment by black 

 bristles. Terminalia entirely black, except the aedea- 

 gus, which is brown. 



Female : Similar to the male ; the hmd femur is more 

 slender, the last 2 tergites with very prominent, stout, 

 black bristles, the last sternite with a posterior border 

 of 4 pairs of long, black, spikelike bristles. 



Type: Male; allotype female; 1 paratype female, all 

 from Calcutta and labeled "T: vuo-Eklund." In the 

 collection of the University Museum at Helsinki. 



Subgenus Haplorwta Frey 



FlQUBES 345, T94, 1478, 1487, 2182, 2248, 2361, 2417 



Haplonota FVey, Rev. Suisse Zool., voL 41, p. 316, 1934. Type 

 of subgenus: Haplonota elegans Frey, 1934, by original 

 designation. 



I can see few essential differences after comparing 

 the type of Haplonota elegans with Cinadus Wulp. 

 The face is more narrowed in Haplonota elegans and 

 the posterior branch of the third vein is more undulate. 

 The scutellum lacks bristles, whereas they are well de- 

 veloped in Cinadus. Length 20 mm. 



Head, lateral aspect : The head is of medium length ; 

 in profile plane behiad; strongly elliptical in front. 

 The face is produced only on the lower half where the 

 gibbosity is slightly longer than the first antennal seg- 

 ment. The occipiit is barely visible in profile, with a 

 fringe of long hairs, which are delicate, and near the 

 point of the upper eye angle it bears 3 distinct, though 

 slender, short, nearly straight, black bristles. The pro- 

 boscis is cylindrical, scarcely thicker at the base; the 

 apex is bluntly rounded, short pilose and directed 

 obliquely forward. Palpus quite slender, cylindrical, 

 pilose, the apex with long haii-s. The antenna with 

 the first segment nearly twice the length of the second 

 segment, both with short, fine bristles below ; the sec- 

 ond segment has a complete circle of bristles laterally. 

 The third segment is only as long as the second; it 

 bears a style 4 or 5 tunes as long as the third segment 

 itself. The 2 minute bristles of the ocellus curved for- 

 ward and downward. 



Head, anterior aspect : Face entirely pubescent, there 

 is no pile on the upper half, the medial portion of the 

 entire gibbosity bears about 12 long, slender, pale 

 bristles. On each side of the gibbosity are 2 bristles 

 which are somewhat more divergent and perhaps 

 stouter. On the lower lateral slopes of the subepistoma 

 there are 2 bristles of similar strength nearly as long. 

 The face is quite narrow, and below the antenna it is 

 approximately an eleventh the width of the entire head 

 and divergent below. Anterior facets of the eye at 

 least double the lateral ones, the enlarged area set off 

 by a minute, angulate ridge, when viewed from above. 



Thorax : The thorax is strongly arched, with a double 

 acrostical row of fine, erect pile in the middle on each 



