271 



in the bottom, and they could constantly be seen browsing 

 upon the microscopic algae that covered the sides of the jar and 

 the submerged leaves. They fed peaceably, side by side, with 

 the mosquitoes, which swarmed in the same water. 



Pupae: The outer coat of the full-grown larva hardens 

 into the puparium, with slight change in form, except that a 

 pair of prominent horns terminate the cephalic portion. At 

 this stage they become very buoyant and float in masses or 

 lodge at the edges of the vessel. 



Professor J. M. Aldrich gives an interesting account* of the 

 use of the puparia of closely related flies for food by the 

 Indians of the Western United States. 



Faiinid ( IJo)naloi)ti/ia) pusio (Wiedemann). f 



Hah. South America, ranging north through West Indies 

 into Southern United States. 



Hawaiian records. The collection of the Hawaiian Sugar 

 Planters' Association has seven specimens taken in Honolulu 

 from 1904 to 1907, also two specimens from Hawaii, 1905. 

 There are no specimens in the College of Hawaii collected 

 previous to 1911-. 



Food liahits of larvae: The specimens in the collections of 

 Honolulu show that the^v have been reared from meat, papaia 

 stem, and dead Japanese beetles by Mr. Terry; and from 

 soured bread, dead cockroaches and chicken manure by the 

 writer. The latter substance was swarming with them. 



Eggs: The eggs are white, beautifully sculptured, and 

 have a median ridge above and a pair of lateral wings Avhich 

 extend the entire length. They are laid in great numbers 

 upon the surface of the food supply. 



Larrae: The larvae, when freed from the substance in 

 which they are feeding, are beautiful objects. They are brown 

 in color and bear two prominent rows of fringed appendages, 

 which extend along the sides and around the caudal border. A 



* Journ. N. Y. Ent. Soc. XX, 90-92. 



t The species has been determined by Frederick Knab, of the U. S. 

 National ^[useum, who states that it was described from South Amer- 

 ica, and is evidently widely distributed. 



