Author Description

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1907 Excerpt:...before the apex and a feeble tooth rudiment in the middle between this and the setiform empodial appendix. Wing membrane hyaline. Pterostigma (fig. 14) broad and large. The pattern of the fore wing produced by the scaling is shining silvery gray-white with brown to gray-brown markings. The markings are distributed as follows:--On all the ends of the veins occurs a spot, those of the posterior margin larger; through the middle of the axillary cell a narrow band passes obliquely outwards from the posterior margin to the anterior margin without however quite reaching the latter; with this band the marginal spots at the ends of an and cu2 are connected; the marginal spot at the end of CMj communicates with a larger irregular spot in the wing centre, which encloses a small round silver white spot; the marginal spots of the wing apex also partly anastomose among themselves. In the middle of the wing base a brown spot. Marginal hair relatively short, yellowish white, blackish at the brown spots. Hind wing with narrow radial cell (R);n near the base of Cm. Veins brown. Marginal hair of the anterior border relatively short and brown, that of the posterior border long and yellowish white. Membrane intensely iridescent in all colours. Ground scales (fig. 50 gs) longish ovate, almost imperceptibly acuminate at the apex; cover scales (da) similar, though slenderer in the basal portion. Macrochaetae (fig. 50) finely pubescent in the distal half. Length of fore wing 23 mm.; wing expanse 5J mm. Ceylon Peradeniya, on tree trunks; January, 1905, two specimens; February, 1905, two; March, 1905, two; collected by Mr. E. E. Green. Perientomum trichopteryx (Hag., 1859). Amphientomum trichopteryx, Hagen. Verh. Zool. Bot. Ges. Wien., 1859, p. 205. Perientomum trichopteryx, Hagen....