First lesson in zoology : adapted for use in schools . CHAPTEE HOUSE FLY AND OTHER TWO-WINGED INSECTS. The body of the fly difEers in a good many points fromthat of a grasshopper or beetle. In the first place, thereare but two wings; hence the flies are called two-winged orDiptera, from two Greek words signifying two wings. !Now, closely inspecting the house-fly, we see that thehead is distinct from the thorax, and the latter from thehind body. The three divisions are seen to be very weUmarked. Turning to the head (Fig. 116) we see that the com-pound eyes are very large and full. The a

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First lesson in zoology : adapted for use in schools . CHAPTEE HOUSE FLY AND OTHER TWO-WINGED INSECTS. The body of the fly difEers in a good many points fromthat of a grasshopper or beetle. In the first place, thereare but two wings; hence the flies are called two-winged orDiptera, from two Greek words signifying two wings. !Now, closely inspecting the house-fly, we see that thehead is distinct from the thorax, and the latter from thehind body. The three divisions are seen to be very weUmarked. Turning to the head (Fig. 116) we see that the com-pound eyes are very large and full. The antennae are short. Fio. 116.—>i, front, and B, side, viewof head of house-fly. oc, sim-ple, e, compound, eye; ant. an-tenna; mxp, maxillary palpi; 2,tongue; lab, labelliun. (Magni-fied.)

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1894