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 . Fig. 12. scm ms. ? epm douin going from before backwards,the prcescwfjuu, scutum, scuteUum,and postscutellum. The scutum is invariably presentand forms the larger part of the «?upper portion (tergum) of the tho- -Pjrax; the scutellum is, as its name emindicates, the little shield so promi- ^..nent in the beetle, which is alsouniformly present. The other twopieces are usually minute andcrowded down out of sight, and placed between the two oppos-ing
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 . Fig. 12. scm ms. ? epm douin going from before backwards,the prcescwfjuu, scutum, scuteUum,and postscutellum. The scutum is invariably presentand forms the larger part of the «?upper portion (tergum) of the tho- -Pjrax; the scutellum is, as its name emindicates, the little shield so promi- ^..nent in the beetle, which is alsouniformly present. The other twopieces are usually minute andcrowded down out of sight, and placed between the two oppos-ing rings. As seen in Fig. 11, the prjescutum of the moth isa small rounded piece, bent vertically down, so as not to beseen from above. In the lowly organized Hepkdus, and some FIG. 11. Tergal view of the middle segment of the thorax of 7elea Polyphemfisprm, priBscutum; ms, scutum: .scm, s,-ntelUnn; ptm, postscutellum; pt, patagium,or shoulder tippet, covering the insertion of the wings. — Onr/i»(l. Fir; 13 Side view of the thorax of T. Pohiphemus, the hau-s removed. 1, rro-thoraK • -2, Mesothorax;.?, Metathorax, separate.! by the wider black Imes. Te
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectinsects
