. Fig. 47. Wing of H. piibipes. linear, membranous empodium. Wings with the mediastinal vein bent at the apex and reaching the margin, the cubital vein forked, the upper branch somewhat long and not steep; there are thus two cubital cells; the discai vein branched, four posterior cells and the discai cell sending three veins to the margin, the lowermost is the upper branch of the postical vein, which closes the discai cell below; the lower branch of the postical vein recurrent, about parallel with the wing-margin, and the anal cell shorter than the second basal cell; the anal vein generally we
. Fig. 47. Wing of H. piibipes. linear, membranous empodium. Wings with the mediastinal vein bent at the apex and reaching the margin, the cubital vein forked, the upper branch somewhat long and not steep; there are thus two cubital cells; the discai vein branched, four posterior cells and the discai cell sending three veins to the margin, the lowermost is the upper branch of the postical vein, which closes the discai cell below; the lower branch of the postical vein recurrent, about parallel with the wing-margin, and the anal cell shorter than the second basal cell; the anal vein generally weak, sometimes reaching the margin, but generally abbreviated. Stigma present. Axillary lobe well devel- oped. Alula not or almost not developed, fringed at the margin. The alar squamula roundish, and likewise fringed at the margin. Of the developmental stages I have only examined a pupal skin of H. niveipennis Zett., but Beling (Arch. fiir Naturgesch. 48, 1, 1882, 218—221) describes larvæ and pupæ of H. interstincta Fall., pilosa Zett., maura Fabr,, quadrivittata Meig., fiavipes Meig. and matrona Hal., and (Verh. zool. bot. Gesell. Wien, XXXVIII, 1888, 2) H. qua- drivittata Meig. again, and Brauer (Denkschr. d. Akad. d. Wissenschaft. Wien, math. nat. Cl. XLVII, 1883, 65, Taf. IV, Fig. 77-79) describes the larva of H. lurida Fall. The body of the larva consists of twelve segments, the head included; it is cylindrical, white or yellowish; the head is small; the last segment is somewhat globular with a mem- branous, somewhat large, triangular tooth or wart; above it lie the terminal spiracles; the anterior spiracles lie at the front end of the
Size: 3661px × 1365px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishercopenhagengecgad
