DASYPOGONINAB 



ROBBER FLIES OF THE WORLD 



79 



especially conspicuous and longer on the middle tibia 

 where there are 6 rows. The bristles are also long but 

 somewhat fewer in number on the hind tibia. Claws 

 and pulvilli long and slender. 



Wings : The wings are shorter than the abdomen ; the 

 marginal cell is widely open, the second vein meets the 

 costa at a right angle. Anterior branch of the third 

 vein is sigmoid and ends well above the apex of the 

 wing. First posterior cell closed and stalked; fourth 

 posterior cell closed with a longer stalk and this cell is 

 considerably shorter than the discal cell. Anal cell 

 closed and stalked. Posterior crossvein long. Am- 

 bient vein absent. 



Abdomen : The abdomen is elongate, broad and gently 

 convex and rather densely covered with coarse, ap- 

 pressed, bristly hairs. Sides of the first tergite with 

 about 7 stout bristles in a vertical row on each side. In 

 the posterior corners of the second, third, fourth, and 

 fifth tergites are patches of weak bristles not readily 

 distinguished from the surrounding pile. The male 

 terminalia almost completely inverted, intermediate in 

 size between Nusa and Laphystia. The epandrium is 

 large, rather long and bowllike, and from the true ven- 

 tral aspect is rather widely open. Sides of the gonopod 

 with a pair of spikelike bristles and the apex with two 

 pronglike, somewhat flattened protuberances. 



Distribution: Australian: Nyximyia niger, new 

 species. 



Nyximyia niger, new species 



A dull black fly with the abdominal tergites more 

 shining and with the outer sixth of the postmargins on 

 tergites two to four linearly white pollinose. Pile and 

 bristles black. Wings brownish and pale, the color 

 caused by exceptionally minute villi and the veins pale 

 brown. The subcostal vein almost yellow. Marginal 

 cell open; first and fourth posterior cells closed and 

 stalked. Length 14 mm., including antenna. 



Type: Male, New South Wales. In the Australian 

 Museum, Sydney. 



Genus Torebroma Hull 



Figubes 47, 433, 864, 873 



Torebroma Hull, Ann. Mag. Nat. Hist., ser. 12, vol. 10, p. 891, 

 1957. Type of genus: Torebroma gymnops Hull, 1957, by 

 original designation. 



Small, remarkably bare flies of brown color, overlaid 

 by grey pollen. The face is short with a very short 

 proboscis and ventrally bears a few, quite short bristles. 

 The antenna is elongate with a spoon-shaped mieroseg- 

 ment. Related to Acrochordomerus Hermann. It is 

 distinguished by the widely open marginal and first 

 posterior cells and the extremely reduced pile. Length 

 10 mm. 



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

 the face short but of rather uniform length and barely 

 convex ; the occiput is likewise short and almost concave 



along the middle of the eye margin. Toward the cer- 

 vix it becomes a little more prominent and because of 

 a short posterior ventral recession of the eye on the 

 lower eighth of the head, it is more conspicuous at this 

 point. Pile of occiput fine, short, and scanty. Bristles 

 absent and only a few stiff, bristly hairs above. Pro- 

 boscis short, not quite extending as far as the face, 

 directed forward, robust at the base, tapered to a blunt 

 apex, which bears a small dorsal apical tuft of bristly 

 pile. Palpus minute and cylindrical, the second seg- 

 ment elongate, the first segment quite inconspicuous and 

 more or less fused, almost wanting. Antenna attached 

 at the upper sixth of the head and distinctly elongate 

 and slender, longer than head. First two segments sub- 

 equal, a stout, short bristle ventrally on the first segment 

 and pale setae above and below. Third segment not 

 quite as wide as the second, its length, without micro- 

 segment, a little greater than the total length of the 

 first two segments. At its apex there is a very short 

 microsegment followed by a much longer, spoon-shaped 

 microsegment, as stout as the third segment, pointed at 

 the apex and its basal recess with a concealed spine. 



Head, anterior aspect: The head is broad, as wide 

 as the thorax, the face at the plane of the antenna wide 

 and slightly divergent below and with deep creases 

 along the horizontal, subepistomal area. Face mi- 

 nutely pubescent, with scattered, short, subappressed 

 pile over the middle and in the middle above the 

 epistomal margin with 3 pairs of quite short, slender 

 bristles. Front short, pollinose, with a longitudinal 

 fissure on either side, shallow; the sides of the front 

 are parallel, the vertex is moderately excavated with 

 slanting sides and pile; the ocellarium is large, trans- 

 verse, with steep sides and large anterobasal ocellus, 

 and fine pile between and in front of the posterior 

 ocellus. 



Thorax : The thorax is moderately high and arched 

 posteriorly and anteriorly, pollinose with scattered, 

 microscopically minute, flat appressed setae. The 

 humerus with similar pile and some which is a little 

 longer but appressed. Mesonotal bristles weak and 

 short. There are 1 notopleural, 5 or 6 supraalar, and 

 no postalar or scutellar bristles. The postalar area, 

 does, however, bear pile. Scutellum with microscopic, 

 scattered, appressed setae and dense pollen, the surface 

 convex. Propleuron with only fine pile, mesopleuron 

 on almost its whole surface with short, fine, scattered, 

 appressed hairs and a tuft in the upper corner of the 

 sternopleuron. Posthypopleuron with an erect, patch 

 of pubescence. Metapleuron usually protuberant, 

 with a vertical band of moderately long, fine pile, 

 Metanotal callosity pollinose only, whole pleuron pol- 

 linose. Metasternum with pile posteriorly and below. 

 Postcoxal area membranous, prosternum fused 

 laterally. 



Legs: All the femora are stout, especially the hind 

 pair, though scarcely or but little swollen; their pile 

 is appressed, dense, pale and setate; bristles absent 

 except for weak bristles at the apices of the tibiae and 

 3 quite slender, small, inconspicuous, anterdorsal 



