. Agriculture for southern schools. can be escaped, for the malarialmosquitoes are active only between sunset and thorough screening of thehouses is the most certain meansof preventing the spread of thedisease. In addition the drainingor filling of the standing waterpools in which the mosquitoesbreed should be done. Small fishlive on mosquito wigglers and,hence, fish should be kept inponds that cannot be drained orfilled. How to know the malarial mos- rio. x76-MALA^iAL Mob- we desire to de-QUITO below; Common hMosquito above stroy or to avoid these mosquitoes, we sho
. Agriculture for southern schools. can be escaped, for the malarialmosquitoes are active only between sunset and thorough screening of thehouses is the most certain meansof preventing the spread of thedisease. In addition the drainingor filling of the standing waterpools in which the mosquitoesbreed should be done. Small fishlive on mosquito wigglers and,hence, fish should be kept inponds that cannot be drained orfilled. How to know the malarial mos- rio. x76-MALA^iAL Mob- we desire to de-QUITO below; Common hMosquito above stroy or to avoid these mosquitoes, we should know how to tell them from harmless kinds and also be able to tell the larvae or wigglers, in their breeding places. All of the mosquitoes that are concerned in spreading this disease belong to a single group and are closely related. The adults are rather long-legged as compared with other kinds; when at rest, they stand with their bodies pointing head first to the surface to which they are clinging (Fig. 176). Other mosquitoes. INSECTS AND HEALTH 27s rest with the body parallel to the surface upon whichthey touch. Among the larvag, or wigglers, these positions are quitereversed, as the malarial kinds are usually found with theirbodies just under the surface of the water and parallel to it,while the other kinds hang, headdownward, nearly at right anglesto the surface (Fig. 177). Greenscum is usually present wheremalarial mosquitoes abound. The Remedies. — These mos-quitoes do not fly far from theplaces where they breed. It isonly necessary to thoroughlyscreen the houses, to avoid beingbitten by the mosquitoes, and tofill or drain the places where theybreed to stop completely the spread of this disease. Careshould be taken to empty the water at least once a weekfrom drinking troughs, barrels, etc., where the mosquitoesmight breed. Tin cans, or similar water holders, shouldbe buried or placed so that they cannot hold water. Cis-terns and wells should be covered and everythi
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