. A manual for the study of insects. Insects. 464 THE STUDY OF INSECTS. The larvae are parasitic, infesting hymenopterous and lepidopterous larvae and pupae and the egg-sacs of Orthop- tera. The pup^ are free, . II HI,. III4 + Vi ^^^^^ V,, "dcvTi; Vj + viu Fig. 564.—Wing of Panfarbes cnJ>iio. The family is a large one, including many genera and species. Family Therevid^e (The-rev'i-dae). The StilettO'flies. With the flies of this family the head is transverse, being nearly as wide as the thorax; and the abdomen is long and tapering, suggesting the name stiletto-flies. These flies are s
. A manual for the study of insects. Insects. 464 THE STUDY OF INSECTS. The larvae are parasitic, infesting hymenopterous and lepidopterous larvae and pupae and the egg-sacs of Orthop- tera. The pup^ are free, . II HI,. III4 + Vi ^^^^^ V,, "dcvTi; Vj + viu Fig. 564.—Wing of Panfarbes cnJ>iio. The family is a large one, including many genera and species. Family Therevid^e (The-rev'i-dae). The StilettO'flies. With the flies of this family the head is transverse, being nearly as wide as the thorax; and the abdomen is long and tapering, suggesting the name stiletto-flies. These flies are small or of medium size; they are hairy or bristly. The antennae are three-jointed ; the third segment is simple, and usually bears a terminal style ; but this is sometimes want- ing. Three ocelli are present. The legs are slender and bristly; the empodia are wanting. Vein III of the wings (Fig. 565) is four-branched, and the last branch (vein III^) terminates beyond the apex of the wing ; the branches of vein V are all separate ; cell VIII is closed near the border of the wing; the 2d cell III and cell V are long. The adult flies are predaceous; and conceal themselves among the leaves of low bushes or settle on the ground in sandy spots, waiting for other insects upon which they prey. The larvae are long and slender, and the body is appar- ently composed of nineteen segments. They are found in. 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
