. A manual for the study of insects. Insects. 330 THE STUD V OF INSECTS. as long as the body; but in one subfamily it is short and membranous. When not in use it is closely coiled like a watch-spring beneath the head. None of the species have ocelli. The venation of the wings (Fig. 407) is quite character- istic ; the most distinctive feature is the presence of what. ¥iG. 407.— Wings of Phlegethontius celeus. appears to be a cross-vein between subcosta and radius of the hind wing. This apparent cross-vein is due to the fact that veins II and III are grown together for a short distance, and the
. A manual for the study of insects. Insects. 330 THE STUD V OF INSECTS. as long as the body; but in one subfamily it is short and membranous. When not in use it is closely coiled like a watch-spring beneath the head. None of the species have ocelli. The venation of the wings (Fig. 407) is quite character- istic ; the most distinctive feature is the presence of what. ¥iG. 407.— Wings of Phlegethontius celeus. appears to be a cross-vein between subcosta and radius of the hind wing. This apparent cross-vein is due to the fact that veins II and III are grown together for a short distance, and then vein II separates and joins vein I. The obvious presence of vein I in the hind wings is unusual; but it occurs in the Psychidae, \\\ the Bombycidae, and in the Anthroceridae (a family not represented in our fauna) also. This basal part of vein I is probably preserved in other cases where it appears to be the base of vein II. Thus in Citheronia (Fig. 417) there is a rudiment of the so-called cross-vein, which has entirely disappeared in the more specialized forms of the family to. 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
