478 DESCBIPTIONS OF SOME NEW SPECIES OP SPIDERS FROM BRITISH INDIA. By R. I. PococK, OF the British Museum of Natural History. (Bead before the Bombay Natural History Society on 9th October, 1900.) The descriptions contained in the following pages are based to a large extent upon materials kindly forwarded to me through Messrs. H. M. Phipson and R. C. Wroughton, by various members of the Indian Forest Service and of the Bombay Natural History Society. The descriptions were drawn up for publication in a volume upon the A7'achmda of India, forming part of the Fauna of India Series. But, unfortunately, exigencies of space compelled me to omit them from the volume, together with the diagnoses of many previously established species. I hope at some future time to be allowed to publish in this Journal illustrations of the essential characters of the species here described. Family ARGIOPID^. Tetragnatha coelestis, sp. n. Colour of carapace and limbs yellowish-brown, sternum infuscate ; abdomen with the dorsal area ashy yellow above, bordered with black ; a broad sinuous superior lateral white band on each side ; median ventral line black with a pale band at the sides. Head much shorter than in T. mandibulata ; eyes of posterior line slightly recurved, subequal, subequally spaced ; of anterior line strongly recurved, the laterals separated from the posterior lateral by about the diameter of the latter; median quadrangle about as wide as long, a little narrowed in front. Basal segment of mandible about as long as carapace, lower border of fang-groove armed with 9 teeth, one close to the fang-socket, one some little distance behind it, and a row of 6 close set ; there is in addition 1 largish tooth projecting downwards and inwards beneath the base of the fang ; upper edge of groove armed with a row of 7 close set teeth and 1 larger tooth close to the fang-socket, also 1 small tooth above close to the joint of the fang ; fang bent at right angles in its basal portion, armed externally on the angle with a single forwardly directed tooth, the rest of the fang unarmed but slightly sinuous. Abdomen abruptly narrowed behind the middle, the posterior half cylindrical, genital aperture only a short distance behind the pulmonary opercula.