. Elementary entomology . entirely wanting. The mouth-parts of the adults are exceedingly rudimentar\-, and they probably take no food. The antennae are short, but at the end of ^'^ '" ^f^ ^^ ^ netbuiidmg caddis worm the lono:, soft abdomen are two or three 1 â ⢠. J .1 in 1 (After Comstock) long, many-jomted, threadlike append- ages, the cerci, which are cjuite characteristic of the May-flies. On warm nights of late spring and early summer the lights of towns near rivers and lakes are often darkened by myriads of May-flies. They are light brown or dusky colored, with wings expanding fro
. Elementary entomology . entirely wanting. The mouth-parts of the adults are exceedingly rudimentar\-, and they probably take no food. The antennae are short, but at the end of ^'^ '" ^f^ ^^ ^ netbuiidmg caddis worm the lono:, soft abdomen are two or three 1 â ⢠. J .1 in 1 (After Comstock) long, many-jomted, threadlike append- ages, the cerci, which are cjuite characteristic of the May-flies. On warm nights of late spring and early summer the lights of towns near rivers and lakes are often darkened by myriads of May-flies. They are light brown or dusky colored, with wings expanding from one to one and one half inches, and with cerci fully as long. The nymphs live at the bottom of ponds, streams, and lakes, feeding on small insects and vegetable matter in the ooze. Along either side of the nymph's abdomen is a row of delicate, platelike, fringed tracheal gills, through which it breathes, and at the tip of the abdomen are three feathery appendages. The legs are strong and enable it both to walk and to swim. The nymphs molt very frequently, there being as many as twenty molts in some species. After about the ninth molt the wing pads commence to appear on the back, and become 1 From ephemeras (lasting but a day).
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Keywords: ., bookcentury1900, bookdecade1, booksubjectentomology, bookyear1912
