EEPORT ON ECONOMIC ENTOMOLOGY 83 



segment very large, deep brown ; clypeus prominent, black ; palpi very minute, deep black ; 

 proboscis black, swollen apically. 



Mesothorax deep brown with narrow-cnrved bro\vn scales, apparently a line of blue 

 scales before the root of the wings as in the female ; scutellum brown with deep-brown small 

 flat scales and four bristles to the mid lobe ; metanotum pale brown basally, dark brown 

 apically ; pleurae brown with some pale and azure blue flat scales. 



Abdomen as in the female. Legs deep brown with bronzy sheen (ungues absent). 

 Wings with brown scales very similar to those of the female, and with a row of flat white 

 scales at the base of the fifth long vein ; the upper branch of the first fork-cell not as close 

 to the first longitudinal vein as in the female ; the stem of the second posterior about one and 

 a half times the length of the second fork- cell, the mid cross-vein longer than the others. 



Lefigth. 2 mm. 



Habitat. Goz-abu-Guma, White Nile. (Dr. Balfour). 



Observations. Described from a nearly perfect male, but with somewhat rubbed body. 

 The two females are just the same as in the type. The male wing venation cannot well be 

 made out as only one wing was left on the specimen and that was crumpled, but the general 

 appearance is that of the female. 



PART II 

 Human and Animal Pests 



depressa 



The Maggot Fly 

 {Bengalia depressa, Walker) Bengaiia 



Dr. Balfour has had this insect sent him from the Bahr-El-Ghazal province, and has 

 also given me a larva from the back of a native, which is undoubtedly the maggot of this 

 fly. The iVIaggot Fly [Bengalia depressa. Walker), is a well-known human and animal 

 pest in parts of Africa. It is also known under the generic name Anc.hmerovv/ia. The 

 larva is, however, very different from that of Aitchmeromyia luteola Fabricius, the Congo 

 Floor Maggot. 



The larva or maggot, which resembles a small "bot" or larval oestrid fly, lives under 

 the skin, producing so-called cutaneous myiasis. There are other instances of cutaneous 

 myiasis, notably in the Cayor Fly {OcJiromyia anthropopliaga, Blanchard) which attacks 

 man in Senegal, especially in the south in Cayor. The larvae called " ver du Cayor " 

 develop in the skin of man, eats, dogs, jackals, etc. 



A closely related species occurs in the South East of Africa. The larva of this fly is 

 very similar to the one described here, which is evidently that of the Bengalia that occurs 

 in the Sudan. The Bengalia occurs in numbers in Natal, but according to Fuller (1) the 

 range of the fly seems limited to the coast and no further inland than the 1,000 foot 

 elevation. It is common from the Tugela downwards, and is particularly abundant about 

 Verulam and Durban, but not so much so to the south of the port. It is also recorded 

 further up the coast from Delagoa Bay. 



Mr. F. P. Mennell of the Rhodesian Museum, Buluwayo, informs (2) me " That like 

 most undesirable insects, it seems to have its headquarters in Rhodesia." It also ranges 

 into British Central Africa and Uganda. 



