370 DIPTERA. 



which are thicker tliau the maxillaa and barbed at the tip, and 

 the single hair-like lingua, or tongue (Jg). These five bristle- 

 like organs are folded together within the hollowed labium (A, 

 which is a little enlarged at the tip, and forms a gutter-like case 

 for the rest of the mouth-parts. The mosquito, without any 

 apparent ettbrt, thrusts them, thus massed into a single awl-likc 

 beak, into the flesh, and draws in the blood through the chan- 

 nel formed by the fine bristles, Wcstwood stating that the la- 

 bium does not penetrate the flesh, but becomes bent upon 

 the breast of the fly. lie adds "it is supposed that, at 

 the same time it instils into the wound 9, venomcus liquid, 

 which, while it enables the blood to flow faster, is the chief 

 cause of the subsequent irritation." So far as we are aware 

 1X0 poison glands have been demonstrated to exist in the head of 

 flies, or other six-footed insects, and we are disposed to doubt 

 whether any poison is poured into the woinid, and to question 

 whether the barbed mandibles are not sufficient to produce 

 the irritation ordinarily accompanying the punctured wound 

 made by the mosquito as Avell as other flies. 



A large mosquito, with two light spots on each wing (Ano- 

 pJieles quadrimaculatus Say), bites fiercely. It is abundant 

 ver}^ early in the spring before other mosquitoes appear. It 

 .seems to hibernate in houses. The genus Corethra has the 

 male antennje very long and densely hairj'. The wings arc 

 finely ciliated as in Culex, and the inner edge has a short 

 fringe. The l>eautifully transparent and delicate whitish larA jc 

 may be seen in early spring in quiet pools. Earlj^ in April 

 the pupa state is assumed, disclosing the flies late in the 

 month. 



Chironomid.e Westwood. Of this small famity the genus 

 Chironomus includes some small species which are mosquito- 

 like, with feathered antcnniie, and abound in swarms in early 

 spring before the snow disappears. The larva are long, slen- 

 der, worm-like ; sometimes of a blood-red color, and aquatic in 

 their habits. While most of the larvae of this genus live in 

 fresh water, we have observed multitudes of the .young of C 

 oceanicvs Pack, living on floating eel-grass and in green sea- 

 weeds at low water mark in Salem harbor. There are two 



