43 
brevis (fig. 22), a small species sometimes with a light-colored abdo- 
men, which is found commonly upon windows though not nearly so 
abundantly as the house fly, is also a dangerous species. The other 
most dangerous forms are the stable fly (Stomowxys calcrtrans) (fig. 23)— 
a biting fly which looks so much like the house fly that it can hardly 
Fig. 22.—Homalomyia brevis: Female at left; male next, with enlarged antenna; larva at right— 
enlarged (original). 
be distinguished from it, but which has a piercing proboscis and bites 
severely—and the forms known as Phora femorata and Sarcophaga 
trivialis. 
In brief, the results of the observations indicate— 
(1) That in the interests of health, and especially as obviating the 
FiG, 28.—Stomoxys caleitrans: Adult, larya, puparium, and details—enlarged (original). 
possibility of the transfer of typhoid fever by flies, the box-privy 
auisance should be abolished wherever it exists, even with ordinary 
farmhouses, and some form of earth closet should be substituted, 
preferably one in which the contents can be removed and securely 
buried at very frequent intervals. 
