. A manual of zoology. Zoology. 41C ARTIIROPODA appressed to the body, so that only indistinct contours can be seen (fig. 450). ]\Iotion is conlhied to bending of the whole body, as is familiar in the pup;r of moths and butlerllies. The /)///>«- loarclalic are without motion because here the pupa (in structure a pupa liljcra) is enclosed in a larger coat, the last hirval skin (some llies). The variations among kir\;e are e\cii greater than with pupa-. Here structure is so completely under the inllaence of en\-ironment tliat with similar or dilTerent conditions Iar\;e widely remote, from the
. A manual of zoology. Zoology. 41C ARTIIROPODA appressed to the body, so that only indistinct contours can be seen (fig. 450). ]\Iotion is conlhied to bending of the whole body, as is familiar in the pup;r of moths and butlerllies. The /)///>«- loarclalic are without motion because here the pupa (in structure a pupa liljcra) is enclosed in a larger coat, the last hirval skin (some llies). The variations among kir\;e are e\cii greater than with pupa-. Here structure is so completely under the inllaence of en\-ironment tliat with similar or dilTerent conditions Iar\;e widely remote, from the systematic standpoint, mav closely resemble each otlier, while those of closely related species may differ extremely. The leaf-feeding lar\'a' of Lejuiloptera (fig. 460) and Tenthreds are brightly colored, the thoracic appendages remaining small and reinforced by the fleshy \-eiUral [)i"olcgs. The pre-. FiG. 459. 1''IG. 4O1. Fig. 4(10. Fig. 459.—Pupa of Sphinx lixuslri (after Liulwif^ t, eve; ::, head: 3, antenmc; 4-6, thoracic somite.^; 7, liind, 8, fore wIiil;; i), lei,'s; 10, prolHiseis; 11, alulonu- nal somiles; 12, spirack'S. I-'IG. 4O0.—],ar\-a of S/'IiiiLV lii^iislri (afler is-Ijciinis). ;;, caudal disc; />, thoracic feel; ps, proieLi;s. FiG. 401.—Larva (,maggol) of blowlly, Muscu voiiiilorij (after LeucliarlV daceous larva- of many beetles and Neuroptera have long thoracic legs, strong manthbles, and no prologs. Other beetle larvx, which burrow in wood or live in the earth, often h;ive the legs rtidimcnlary or wholly lack- ing. These lead to the maggoldike lar\u-, in which the moulh parts are inconspicuous and the distinction between head and may vanish. Such soff-skinned tiniiukited sacs occur in the bees (fig. 50) aiul other Hymenoptcra, as well as in many flies (lig. 461); that is, larva- which li\e in an abundance of food either because of parasitism or because the mother has pro\idetl Please note that these images ar
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
