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 . resjiires by branchial fila-ments. (Leconte.) Elmis (Fig. 401, larva of a Europeanspecies) is known by the narrow, elongate scutellum. Heterocekid^e MacLeay. This family consists of but asingle genus, Heterocerus; it is represented in cA^ery portionof our territory. The species are numerous, but very similarin form and color, so that care is necessary in distinguishingthem. They are oblong or subelongate, oval, densely clothedwith short, silky pub
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 . resjiires by branchial fila-ments. (Leconte.) Elmis (Fig. 401, larva of a Europeanspecies) is known by the narrow, elongate scutellum. Heterocekid^e MacLeay. This family consists of but asingle genus, Heterocerus; it is represented in cA^ery portionof our territory. The species are numerous, but very similarin form and color, so that care is necessary in distinguishingthem. They are oblong or subelongate, oval, densely clothedwith short, silky pubescence, very finely punctuate, and of abrown color, with the elytra usually variegated with undulatingbands or spots of a yellow color. They live in gallerieswhich they excavate in sand or mud at the margin of bodiesof water, and, when disturbed, run from their galleries and takeflight, after the manner of certain species of Bembidium.(Leconte.) LuCANiD^ Latreille. This family is closely allied to thenext, and is often united witli it, as it differs chiefly fromttie outer lamellate joints of the antennae not being so closely SCARAB^ID^. 451. anited into a compact club, as in the Scarabeidce, and thementum is iisuall} large. The genus Lucanus, called the Stag-horn beetle, is of large size, with enormously developed jawsin the male, as in Lucanusdama Fabr. (Fig. 402,S). The larva of Lu-canus dama (Fig. 403, andcocoon, natural size) islong, thick, nearly cj^in-drical, and the corneousrust-colored head is armedwith two large jaws. Liv-ing in rotten wood, likethe Cerambycidoi, itconstructs a cocoon of thechips it makes. The larvaof the European L. cervusis stated by Roesel to livesix years. Harris states that they lay their eggs in crevices ofthe bark of trees, especially near the roots. The larvae resem-ble the grubs of the Scarabseans in color and form, but are smoother, being lesswrinkled. Dorcas hre-vis Say (Fig. 404) isan exceedingh rare in-sect whose habits areunknown. In Pas
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectinsects
