4 FARMERS’ BULLETIN 679. 
of course, is distinctly not the case. They breed in decaying vege- 
table material, in excreta of animals, and in dead insects. 
Still another fly—and this one is still smaller—is a jet-black 
species known as the window fly (Scenopinus fenestralis L.), which 
Fic. 6.—The little house fly (Homalomyia brevis) : Female at left; male next, with 
enlarged antenna; larya at right, All enlarged. (Author’s illustration.) 
in fact has become more abundant of later years. Its larva is a white, 
very slender, almost threadlike creature and is found in cracks of the 
floor in buildings, where it feeds on other small insects. 
In the autumn, when fruit appears on the sideboard, many speci- 
mens of a small fruit fly (Drosophila ampelophila Loew) (fig. 7) 
make their appearance, attracted by the odor of overripe fruit. 
Fic. 7.—The fruit fly (Drosophila ampelophila) : a, Adult; b, antenna of same; c, base of 
tibia and first tarsal joint of same; d, puparium, side view; e, puparium from above; 
f, full-grown larva; g, anal spiracles of same. All enlarged. (Author’s illustration.) 
A small slender fly is not infrequently seen in houses, especially 
upon windowpanes. This is Seps?s violacea Meig., shown enlarged 
in figure 8. 
All of these species, however, are greatly dwarfed in numbers by 
the common house fly. In 1900 the senior author made collections 
