The Mosquito Must Go 



17 



from your cottage and the cottage remain free if no favoring 

 winds blow from the breeding place toward it, while cottages 

 in the direction of the favoring winds may be badly infested at a 

 distance of 30 miles from the breeding places. 



The problem of suppressing the salt-marsh mosquito is of 

 state-wide interest and the work already so well started should 

 De completed largely with state funds, while the problem of 

 maintaining the drainage systems thus established on the salt 



Fig. 4. The Common Killifish — The Great Natural Enemy of 

 the Salt-Marsh Mosquito 



1 — Male; 2 — Female. Give them a chance and they will eat the 

 mosquitoes before they can fly and bite 



marshes and of suppressing the fresh-water bred mosquitoes can 

 and will be taken care of by local funds. 



The Salt-Marsh Mosquito and Its Natural Enemies 



The eggs of the salt-marsh mosquitoes are in the marsh 

 mud, and every time the meadows are covered with the warm 

 water of summer, either by tide or rain, a brood of wrigglers 

 (immature forms of the mosquitoes) hatches and within two 

 weeks the mosquitoes are on the wing. 



Two natural agencies limit or entirely eliminate the broods 

 thus started. If the weather is bright the shallow sheet water 

 covering large areas of marsh surface and filling the shallower 

 pools is quickly evaporated and the wrigglers die. The deeper 



