HOUSEHOLD AND CAMP INSECTS 7 



Lucilia, and the large blue bottle flies, Cynomyia and several species 

 of Calliphora. 2 



The effect of insanitary conditions jsuid favorable weather changes 

 is strikingly exemplified in the following: In February and March 

 1909 it was unusually cold at Cairo, Egypt. April 24th heavy rains 

 fell, followed by a hot wave May ist and by the appearance 14 

 days later of a plague of flies, the latter evidently having bred in 

 the accumulated filth which, moistened and warmed, afforded 

 almost ideal breeding conditions. 3 



House Fly 



Musca domestica Linn. 



The house fly is most easily recognized as the rather slender, 

 dull-grayish insect some one-quarter of an inch long, which abounds 

 in and about dwellings during warm weather, especially in mid- 

 summer. It is easily distinguished from the stouter, metallic-blue 

 or green bottle flies or meat flies occasionally seen in houses, especi- 

 allv about meats. 



Fig. T Typhoid or house fly; a, male, seen from above; b, proboscis and palpus 

 from the side; c, tip of the antenna; d, head of female; e, puparium; f, the ante- 

 rior breathing pore or spiracle, all enlarged. (After Howard & Marlatt, U. S. Dep't 

 Agr. Div. Ent. Bui. 4 n. s. 1896) 



2 Bishopp Jour. Econ. Ent., 10:269-77. 1917. 



3 Ross. Sci. Amer. Supp., 2003, p. 322-23, May 23, 1914. 



