40 1 



pygium in $ larger, paler, somewhat more oval in out- 

 line, and clothed with fewer hairs. (7) Tip of $ 

 abdomen less hairy laterally. (8) Bristles on sixth 

 segment in $ stouter and more conspicuous than in 

 longipalpis. 



6. Gl. longipalpis. 



(fi/3) Last two joints of front and middle tarsi 

 entirely pale. 



7. Gl. pallidipes. 



(aa) Large species. Length at least ten-and-a- 

 half mm. (in this respect they contrast markedly with 

 the other small species). 



8. Gl. longipennis. (i) Thorax with four sharply 

 defined dark-brown oval spots. (2) Ocellar spot, 

 dark-brown, very conspicuous compared with the body. 

 (3) Proboscis shorter than in G. fusca, and relatively 

 shorter, compared with the body, than in any other 

 species. (4) In both sexes the front is broader than 

 in Gl. fusca. 



9. Gl. fusca. Thorax without spots. 



2. Sarcophagidae. 



Not blood-sucking. Arista feathery at the base, 

 bare at the tip. Large flies, about 14 millimetres long. 



Genus Sarcopbaga. Elongated thorax, three black 

 bands, abdomen spotted. Third segment of antenna 

 three times the second segment. 



S. carnaria, S. magnifica, and S. ruficornis (India), 

 give rise to terrible forms of myiasis in man and 

 animals. 



3. Oestridae (Bot. ( = Larva) Flies). 



Not blood-sucking. Large flies. Proboscis rudi- 

 mentary. Antenna very short. Arista segmented. 

 Flight humming. 



(a) Genus Gastropbilus, e.g., G. equi. The white 

 eggs can be easily seen on the horse's hair. The larvae 



cc 



