330 MEDICAL ENTOMOLOGY 



GENUS CHOEROMYIA, ROUBAUD 



Allied to Anchineromyia ; the abdomen is shorter, more tapering and 

 has equal segments. 



This genus, which has been created recently by Roubaud, contains 

 two species whose larvae suck the blood of wart hogs and Aard-varks in 

 the Soudan. Choeroinyia boueti, Roubaud, is found in Niamey and 

 Timbuctoo, where its larvae live in or near the lairs of the Aard-vark, 

 Orcteropus senegalensis, Lese., and the wart hog, Phacochaerus africana, 

 Cuv. The larvae of C. boueti resemble those of A. luteola and live in 

 the damp earth in or near the lairs of these animals ; the larval stage 

 lasts fifteen days, and the pupal stage about eleven. The fly lays about 

 fifty eggs, all in a heap, in the sand. The larvae are voracious blood- 

 suckers, and can ingest about three times their weight of blood. Their 

 biting apparatus appears to be similar to that of A. luteola. 



C. choerophaga, Roubaud, is an allied species whose larvae feed on the 

 wart hog. 



GENUS OCHROMYIA, MACQUART 



The flies of this genus are the nearest oriental allies to Anchineromyia ; 

 with which some dipterologists group them. O. jejune is a common 

 Indian species, and is usually to be seen resting on walls in Madras. It 

 is said to feed on termites when they swarm. Howlett records having 

 seen this fly catching ants while carrying their eggs or nymphs, and 

 dragging the latter away from them, and sucking out their juices. 



GENUS BENGALIA, ROBINEAU-DESVOIDY 



Large yellowish flies. Cheeks narrow. Last segment of abdomen with 

 prominent bristles. 



Several species of Bengalia are known, B. depressa being the com- 

 monest ; it is a maggot fly and causes myiasis in man and animals in 

 many parts of Africa. According to Mennel it is widely distributed in 

 Rhodesia, but it also ranges into British Central Africa, and Uganda. 

 It is a large fly of a yellowish brown colour, with two dusky bands near 

 the apex of the abdomen. Mennel states that it deposits its eggs on the 

 hairs of animals, and on clothing, especially when hung out to dry. 

 Fuller, on the other hand, thinks that the fly deposits its eggs chiefly on 

 the scalp, in .which situation he has seen twenty to thirty maggots. 

 The larvae always leave their host and pupate in the ground. 



