402 



are swallowed and they attach themselves to the mucosa 

 of the stomach. 



(b) Genus Hypoderma, e.g., H. lineata. Larvae 

 produce ox warbles ( = tumours) in the ox. 



(c) Genus Oestrus, e.g., O. ovis. Larvae in the 

 respiratory passages of the sheep. 



(d) Genus Cephalomyia, e.g. C. maculata. In the 

 camel. 



(e) Genus Cepbenomyia, e.g., C. rufibarbis. In red 

 deer. Scotland. 



(/) Genus Dermatobia, e.g., D. cyaniventris. Larva 

 is the ' ver macaque ' (America), producing myiasis in 

 man and cattle. 



(g) Genus Cordylobia, e.g., C. antbropophaga. 

 Larva is the ' ver de Cayor ' (Senegal), producing 

 myiasis in man. 



Myiasis is common in Africa and in the tropics, 

 but the larvae have been identified in but few instances 

 as yet. 



The fourth group, the Pupipara (to which 

 Glossina also belongs, from the point of view of its life 

 history), comprises : 



i. Hippoboscidae (spider flies). 



They run rapidly over the body, hiding in 

 hair or feathers. Head circular. No distinct neck. 

 Clypeus distinct, separated from the head by a 

 curved suture. Antennae lie in cavities in its 

 anterior angle. Antennae : one segment with or 

 without a style (arista). Palpi absent. Abdomen 

 leathery, capable of much distension in ? . Tarsi : 

 fifth segment longest with two or three claws. 

 Empodia (between the claws) distinct. Wings large, 

 or mere strips, or absent. 



(a) Genus Hippobosca. Wings large, obtuse. No 



