GENUS STOMOXYS 



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Palps as long or longer than the proboscis, sometimes club- 

 shaped ; head less straight ; height equal to breadth ; eyes 

 round, and sinuosity less marked or even absent . . .__ . . . < 



Proboscis short and solid, not pointed, labella distinct. Palps 

 club-shaped, as long as proboscis, and curved upwards. 

 Eleven to twelve bristles on upper surface of arista, long but 

 not undulating ; one black sternopleural bristle. Body 

 robust ; wing with first longitudinal vein nude, and third with 

 spines at its base ; fourth vein strongly curved, but straight 

 after bend ; first posterior cell narrowed .... Stygeromyia 



Proboscis long and pointed with rudimentary labella ; palps 

 straight, nearly linear, longer than proboscis, horizontal 

 and appearing to adhere to it. Arista with six to ten bristles 

 extending up to the summit, apical portion of arista much 

 shorter than the bristles, which are undulating ; two sterno- 

 pleural bristles usually yellow, the posterior one small. 

 Body slender ; wings with all veins nude at base. First 

 longitudinal vein terminating opposite the small transverse 

 vein ; fourth vein feebly curved and first posterior cell there- 

 fore widely open ......... Lyperosia. 



First and third longitudinal veins spinulose at base ; female is 

 distinguished from male by its colouration, particularly by 

 its red legs. Body robust. Arista with five to eight bristles 

 above, and three to four below. Palps as long as proboscis, 

 and feebly club-shaped. Two sternopleural bristles of the 

 same length. Fourth longitudinal vein curved after the 

 bend ; first posterior cell widely open ..... Haematobia. 



First and third longitudinal veins nude at base ; no sexual 



dimorphism in the colour of the legs ........ 



Body robust ; palps strongly spatulate ; arista with five to six 

 bristles below ; two sternopleural bristles. Fourth longitudi- 

 nal vein feebly curved ; first posterior cell broadly open . Bdello larynx. 



Body slender ; palps feebly spatulate ; arista with five to six 

 bristles above and two below. Two black sternopleural 

 bristles, the anterior small and sometimes absent. Fourth 

 longitudinal vein strongly curved, then straight ; first pos- 

 terior cell straight at summit .... . Haematobosca. 



GENUS STOMOXYS, GEOFFREY 



Medium-sized, greyish flies, some of them not unlike the house fly ; 

 their bodies are usually oval, and the head in profile is straight 

 and of considerable height. The front in male at vertex is narrow, 

 and in the female at centre about one-third total width of head. 

 Arista with bristles only on its upper surface, usually eight to ten in 

 number. Palps small, slightly cylindrical, and about half the length 

 of the proboscis. Thorax somewhat longer than broad, usually with 

 four clove brown to black longitudinal bands. Thoracic chaetotaxy 

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