Feb., 'o6] ENTOMOLOGICAL NEWS. 65 



that they will eat fermented vegetable matter I was able to 

 keep them under observation for long periods in cages. They 

 are attracted by the smell of vinegar, maize beer or any sour 

 smell, and may be captured by using paper soaked in vinegar 

 as a bait. 



I hope to publish on some future occasion the morpho- 

 logical observations which I have made, so I give here very 

 brief notes on the appearance in the various stages. 



THE OVUM. 



The ovum* (Fig. i, A) is light cream color, about 1.5 x 0.6 

 mm. in size with smooth surface and oval outline. 



THE LARVA. 



The larva (Fig. 1, B) has eleven segments, mouth parts 

 formed for piercing, and is of a light gray color. Its size 

 ranges from about 0.2 mm. long in very young specimens to 

 15 mm. in those about to pupate. 



THE PUPA. 



The puparium (Fig. 1, C) is deep brown in color and is 9.5 

 -12 mm. in length. 



THE IMAGO. 



The imago (Fig. 2), first described by Fabricius, is 12-14 

 mm. in length, stoutly built and of a tawny color with dark 

 markings. 



The distal half of the abdomen is blackish. As Mr. Austen 

 informs me that it is common along the entire west coast of 

 Africa, f the name which has been given to the larva — ' ' Congo' ' 

 floor maggot is manifestly incorrect and misleading. 



HABITS AND LIFE HISTORY. 



A. luteola is partly domestic and partly sylvan in its habits. 

 When one sits in a native village the flies come buzzing about 

 him, in the evening especially, as if seeking an inhabited spot 

 to oviposit. I, however, saw a number of individuals one 

 evening (Feb. 4th, 1904) in the bush half a mile from any 



• From the ovary of a pregnant female. 



t It has recently been reported from Uganda (vide Journal of the Royal Army Medical 

 Corps, November, 1904). 



