Guide to the study of insects and a treatise on those injurious and beneficial to crops, for the use of colleges, farm-schools, and agriculturists . inated antenna?. In C. ser-ricornis Say the antennae are seiTate. In Corydalus, the largestform known, the piO-thorax is square butnarrower than the headand the antennoe arestout but filiform. Themale of C cornutusLinn. (Fig. 594, fe-male ; fig. 595, male ;, pupa; fig. 597,larva), has very longmandibles, about twiceas long as the head,whence its specificname. According tothe Editors of the American Entomol-ogist, the eggs ofthis insect (Fig
Guide to the study of insects and a treatise on those injurious and beneficial to crops, for the use of colleges, farm-schools, and agriculturists . inated antenna?. In C. ser-ricornis Say the antennae are seiTate. In Corydalus, the largestform known, the piO-thorax is square butnarrower than the headand the antennoe arestout but filiform. Themale of C cornutusLinn. (Fig. 594, fe-male ; fig. 595, male ;, pupa; fig. 597,larva), has very longmandibles, about twiceas long as the head,whence its specificname. According tothe Editors of the American Entomol-ogist, the eggs ofthis insect (Fig. 598)are oval, about thesize of a radish seed,and of a pale color,with some dark mark-ings. They are usu-ally deposited in asquarish mass uponreeds or other aquaticplants overhanging thewater. Hagen doesnot think that thelateral filamentous ap-pendages are connect-ed with respiration;the little sponges atthe base of the filaments and a little l)cliind them are the truebranchiiv. The reason that the larva of Corydalus has bothbranchise and spiracles is, that it lives, like Sialis, some weeksout of the water before its transformation. (Hagen.). €08 NEUROPTERA. The genus Rajjhidia is uot aquatic in its habits as it is foundunder the bark of trees pursuing small insects. The adult hasa long neck (prothorax), which is much narrower than the head,and the antennae are short and filiform, while the ovipositor ofthe female is long and ensiform, probably enabling it to depositits eggs in the cliinks in the bark. The larva is long and slender; beforetransforming itmakes no first the pupais inactive, butaccording to a t e r h o u s e(Westwoods In-troduction), it be-comes activewhile the imagoskin is develop-ing, and walksabout, as the pu-pa skin is exceed-ingl}^ thin. Theg e n u s is onlyfound on the Pa-cific coast of tliiscontinent, anoth-er proof of theanalogy of the in-sect fauna of theWestern shoresof this countryto that of Europe,where this genusalso abounds. In thei
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectinsects
