. A manual for the study of insects. Insects. DIPT ERA. 459 eyes are contiguous in both sexes. The antennae are two- or three-jointed, and are furnished with a style or bristle in some genera, in others not. The venation of the wings varies greatly in the different genera. We are unable, there- fore, to point out distinctive features drawn from these organs. The figure given (Fig. 554) represents a single genus rather than the VIIj+IX Vj + VIII Fig. 554.—Wing of Eulonchus. The flies are generally slow and feeble in their move- ments. In some species that feed upon flowers the pro- bos
. A manual for the study of insects. Insects. DIPT ERA. 459 eyes are contiguous in both sexes. The antennae are two- or three-jointed, and are furnished with a style or bristle in some genera, in others not. The venation of the wings varies greatly in the different genera. We are unable, there- fore, to point out distinctive features drawn from these organs. The figure given (Fig. 554) represents a single genus rather than the VIIj+IX Vj + VIII Fig. 554.—Wing of Eulonchus. The flies are generally slow and feeble in their move- ments. In some species that feed upon flowers the pro- boscis is very long, sometimes exceeding the body in length. Other species take no nourishment in the adult state, and have no proboscis. The empodia are pulvilliform. '* The larvae are apparently chiefly parasitic, and in the few species in which they have been observed are parasitic on spiders or their cocoons, in the former cases the young larvae living within the ; (Williston.) Family Nemistrinid^ (Nem-is-trin'i-dae). The Tangle-veined Flies, The members of this family are of medium size; some of them resemble horse-flies, and others bee-flies. They can be recognized by the peculiar venation of the wings, there being an unusual amount of anastomosing of the veins (Fig. 555), which gives the wings a very characteristic Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Comstock, John Henry, 1849-1931; Comstock, Anna Botsford, 1854-1930. joint author. Ithaca, N. Y. , Comstock Pub. Co.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectinsects, bookyear1895
