A text-book of entomology, including the anatomy, physiology, embryology and metamorphoses of insects, for use in agricultural and technical schools and colleges as well as by the working entomologist . Fio. 49.—Mandible of Pusxalus cornutus with theprostheca (!): A, that of a Nioaraguan species; a, inside,&, outside view, with the muscle. 62 TEXT-BOOK OF ENTOMOLOGY Mandibles are wanting in the adults of the more specialized Lepi-doptera, being vestigial in the most generalized forms (certainTineina and Crambus), but well developed in that very primitivemoth, Eriocephala (Fig. 51). They are al
A text-book of entomology, including the anatomy, physiology, embryology and metamorphoses of insects, for use in agricultural and technical schools and colleges as well as by the working entomologist . Fio. 49.—Mandible of Pusxalus cornutus with theprostheca (!): A, that of a Nioaraguan species; a, inside,&, outside view, with the muscle. 62 TEXT-BOOK OF ENTOMOLOGY Mandibles are wanting in the adults of the more specialized Lepi-doptera, being vestigial in the most generalized forms (certainTineina and Crambus), but well developed in that very primitivemoth, Eriocephala (Fig. 51). They are also completely atrophied inthe adult Trichoptera, though very large and functional in the pupaof these insects (Fig. 52), as also in the pupa of Micropteryx (Fig. 53).. Fio. 50. — Mandible of C«prwcarol!n«.— After Smith. AC. licus. 4 (figureto right),do. of Leixluti-ojihiin cttir/ii/attm; £, of Phanatua carnifeJ-; (/, end of galea, — g, eularged;c, conjunctivas. C, of Meloe anguslicollis: I, lacinia; a, lacinia enlarged. They are also wanting in the imago of male Diptera and in thefemales of all flies except Culicidse and Tabanidse. They are said by Dr. Horn to be absent in the adult Plalupsyllusr,/.s/o/-/,s, though well developed in the larva; and functional mandi-bles arc lacking in the Hemiptera. The first maxillae. — These highly differentiated appendages areinserted on the sides of the head just behind the mandibles and themouth, and are divided into three lobes, or divisions, which are sup-ported upon two, and sometimes three basal pieces, the basal THE FIRST MAXILLA 63
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectinsects
