XI 



8. Bristles on sixth segment in $ stouter 

 and more conspicuous than in longi- 

 palpis. 



5. Gl. longipalpis. — 



(B) Last two joints of front and middle tarsi 

 entirely pale. 



6. Gl. pallidipes. — 



Large species. Length, at least ten-and-a-half 

 mm. (in this respect they contrast markedly with 

 the other small species). 



7. Gl. longipennis. — 



1. Thorax with four sharply defined 



dark-brown oval spats. 



2. Ocellar spot, dark-brown, very con- 

 spicuous 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. 



8. 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 Sarcophaga. 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 rrjyiasis in man and animals. 



3. — [Oestridae] (Bot. (=Larva) Flies). 



Not blood-sucking. Large flies. Proboscis rudimentary. 

 Antenna very short. Arista segmented. Flight humming. 



(a) Genus Gastrophilus, e.g., G. equi. The white eggs can be 

 easily seen on the horse's hair. The larvae are swallowed 

 and they attach themselves to the mucosa of the stomach. 



(6) Genus Hypoderma, e.g., H. lineata. Larvae produce ox 

 warbles (=tumours) in the ox. 



(c) Genus Oestrus, e.g., 0. Ovis. Larvae in the respiratory 

 passages of the sheep. 



