186 MOSQUITOES. 
hospitality should not in such a case become a general prac- 
tice, as these insects are apt to take an unfair advantage of 
their host. The mosquitoes were not slow to utilize these 
artificial ponds and in a manner that will be shown later. 
At the same time large numbers of both sexes of these mos- 
quitoes congregated upon the windows, and many entered 

































































































































































Fig. 153.—Mosquitoes at home; a, larva; b, pupa; c, adult leaving pupal 
skin; d, female depositing egg; e, male. Greatly enlarged. After Brehm. 
the houses, as if to indicate to the inhabitants that mos- 
quito-screens would soon be of some use. The great major- 
ity of mosquitoes entering houses were females, and but very 
few males could be detected. Early in May, and through- 
out the summer, numerous generations of mosquitoes were 
produced in these barrels and in all stagnant water that 
