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The sucking apparatus of the Diptera Fig. 9.Fig. 10.
Fig. 9.—Cone-fly (Rhingia roslrata), natural size. Fig. 10.—Eristalis arbustorum, natural size. consists of a suctorial proboscis, resembling in a general way that of the common house-fly. It is tubular, short and thickened at its extremity, so as to form a disk, upon which are