Reduction of Domestic Mosquitos Instructions for the Use of Municipalities Tow
Reduction of Domestic Mosquitos Instructions for the Use of Municipalities Tow
Edward Halford Ross
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These spermathecse are spherical, inelastic chitinous bodies situated in the last abdominal seg- ment of the female ; they can just hold the number of spermatozoa requisite to fertilise all the eggs laid in each brood. If a female lays a whole egg-raft or complete brood, she exhausts all the spermatozoa within her spermathecae and then she must again cohabit with a male in order to be replenished. This is the reason why males are likely to remain in or, resort to the places where the females co...mmonly THE PERPETUATION OF THE SPECIES 35 lay their eggs. For example, in houses, the males of the Culecines are commonly found in the water- closets. The females are attracted there by the seal- water, for they know that their children will thrive therein ; and also that as soon as they have laid their eggs the males are ready to refertilise them again. The eggs exude their larvae into the seal- water of the closet, the latter are washed down into the cesspool where the water is at an even tempera- ture, and where there is plenty of food for them ; so the perpetuation of the species is assured.
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