First lesson in zoology : adapted for use in schools . Fio. 119.—Head and proboscis of the blow-fly. e, eye; c, cranium; 6j), basiprobos-ois; p, maxillary palpus; pr, chitinous ridges uniting with the rudimentarymasjlla; Ip, lower labial plate; mp, medi-, dp, disti-proboscis. like surface, with which the fly laps up liquid sweets, orany matter which seems good to the flys mind. The two flaps at the end of the proboscis are supportedupon a framework of strong but delicate rods which act as EOUSE-FLT AND OTHER TWO-WINGED INSECTS. Ill a set of springs to open and shut the broad flaps. The in-side
First lesson in zoology : adapted for use in schools . Fio. 119.—Head and proboscis of the blow-fly. e, eye; c, cranium; 6j), basiprobos-ois; p, maxillary palpus; pr, chitinous ridges uniting with the rudimentarymasjlla; Ip, lower labial plate; mp, medi-, dp, disti-proboscis. like surface, with which the fly laps up liquid sweets, orany matter which seems good to the flys mind. The two flaps at the end of the proboscis are supportedupon a framework of strong but delicate rods which act as EOUSE-FLT AND OTHER TWO-WINGED INSECTS. Ill a set of springs to open and shut the broad flaps. The in-side of this broad, fleshy expansion is rough, like a rasp,and, as Newport states, is easily employed by the insectin scraping or tearing delicate surfaces. It is by means ofthis curious structure that the busy house-fly occasions. 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. 119-122.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1894
