. The butterfly book; a popular guide to a knowledge of the butterflies of North America. Butterflies. The Life-History and Anatomy of Butterflies pillars have long, worm-like bodies. Frequently they aie thickest about the middle, tapering before and behind, flat- tened on the under side. While the cylindrical shape is most common, there are some families in which the larvae are short, oval, or slug-shaped, sometimes curiously modified by ridges and promi- nences. The body of the larvae of lepi- doptera consists normally of thirteen rings, or segments, the first constituting the head. The head
. The butterfly book; a popular guide to a knowledge of the butterflies of North America. Butterflies. The Life-History and Anatomy of Butterflies pillars have long, worm-like bodies. Frequently they aie thickest about the middle, tapering before and behind, flat- tened on the under side. While the cylindrical shape is most common, there are some families in which the larvae are short, oval, or slug-shaped, sometimes curiously modified by ridges and promi- nences. The body of the larvae of lepi- doptera consists normally of thirteen rings, or segments, the first constituting the head. The head is always conspicuous, com- posed of horny or chitinous material, but varying exceedingly in form and size. It is very rarely small and retracted. It is generally large, hemispherical, conical, or bilobed. In some families it is ornamented by horn-like projections. On the lower side are the mouth-parts, consisting of the upper lip, the mandibles, the antennae, or feelers, the under lip, the â'^'°- '^â -^^^^'â P'''?,'' ^J maxillae, and two sets of palpi, known as Paptho philenor (Riley). , ' .,, . .. , i ⢠, , ⢠, the maxillary and the labial palpi. In many genera the labium, or under lip, is provided with a short, horny projection known as the spinneret, through which the silk secreted by the cater- pillar is passed. On either side, just above the man- dibles, are located the .^â¢â¢iv^ eyes, or ocelli, which in the caterpillar are â u . ⦠â J . Fig. 14. âHead of caterpillar Simple, round, shining oiAnosiapicxippiis,\o^Qxs\dit, H , prominences, generally niagnifled 10 diameters: lb, la- neaa ^ o j brum, or upper lip; ma, mandi- of caterpillar of only tO be Clearly dlS- bles; mx, maxilla, with two ^''^'filf ,^i'r tinguished by the aid palpi; //», labium, or lower lip, nas,front view, & J_ vvith one pair of palpi; 5, spin- enlarged, of a magnifying-glass. neret; a, antenna; 0, ocelli. These ocelli are fre- (After Burgess.) quently arranged in series o
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbutterf, bookyear1904
