PARASITOLOGY. 25 
the flies away. Coal-tar solutions, such as creolin 
and kreso, keep the flies away for only a short 
time. 
Stomoxys CALCITRANS (Stoma—mouth, calcitro—sting). 
Synonyms.—Stomoxys stabulans; stable-fly; sting- 
ing fly. 
ffistory.—Widely distributed, they appear in the 
latter part of summer. They were first described in 
1761. 
Description.—It is about the size of the house-fly. 
When at rest the wings are nearly at right angles. 
The head is provided with a solid, elongated stylet- 
shaped proboscis, bent near its base. 
Life Cycle.—The ova are laid in the fresh feces, 
where the larval stage is passed. The pupal stage 
‘is passed in the ground. 
Animals Attacked.—It enters stables and attacks 
horses and cattle. Its bite is severe, causing vesi- 
cles, which rupture and produce scab; the hair be- 
comes erect and the legs become sore. This fly has 
been thought to carry the germs of anthrax and of 
glanders, by attacking healthy animals soon after 
diseased ones have been feasted upon. 
Curysors VITTATUS. 
Synonyms.—Deer fly; striped ear fly. 
Description—About one-half the size of the common 
house fly. Narrow slender thorax and abdomen, yellowish 
with brownish-black stripes running longitudinally of the 
thorax and abdomen. The wings are set out from the 
body similar to the stomoxys and are banded wiih brown 
and white stripes. The mouth parts are provided with a 
stylette with which it pierces the skin and sucks blood. 
Distribution —They are common in the Rocky Mountains, 
where they are a great annoyance to horses and cattle. 
