First lesson in zoology : adapted for use in schools . Fig. 1^.—Section through the head of the blow-fl^. 6, cranial bladder; f, ful-crum; h, hypophaiynz; «d, salivary duct leading into the throat; o, mayilla. much mischief to the covers of our books, by scraping offthe albuminous polish, and leaving tracings of its depreda-tions in the soiled and spotted appearance which it occasionson them. The head of the blow-fly may also be examinedwith the aid of Figs. Fig. 121.—Side-view of the lahellum. ca, chltinous arch supporting the falsetracheae (j>t). The thorax is somewhat rounded,
First lesson in zoology : adapted for use in schools . Fig. 1^.—Section through the head of the blow-fl^. 6, cranial bladder; f, ful-crum; h, hypophaiynz; «d, salivary duct leading into the throat; o, mayilla. much mischief to the covers of our books, by scraping offthe albuminous polish, and leaving tracings of its depreda-tions in the soiled and spotted appearance which it occasionson them. The head of the blow-fly may also be examinedwith the aid of Figs. Fig. 121.—Side-view of the lahellum. ca, chltinous arch supporting the falsetracheae (j>t). The thorax is somewhat rounded, and though composedof three rings, yet these are so consolidated that it is atfirst hard to identify them. The prothorax is rudimentary,the thorax consisting almost wholly of the middle ring 112 FIRST LESSOm IN ZOOLOGY. (mesothorax). The latter forms the greater part of the tho-rax. It consists of three large upper pieces, the prcescuium,scutum, and the triangular or shield-shaped seutellum (Fig.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1894
