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Show 1893.] ME. E. Y. WATSON ON THE HESPEEIIDJS. 3 Mr. Oldfield Thomas exhibited three adult specimens, a male and two females, of the Bornean Monkey recently described by him under the name of Semnopithecus cruciger1. These specimens showed that this Monkey was after all fully as large as S. chryso-melas and S. hosei, the adult male having a body 520 m m . and a tail 700 m m . in length; so that the typical skin must have been decidedly immature. In the male specimen the coloration was almost exactly similar to that of tbe type, but in the two females the broad black dorsal line was interrupted just below the level of the shoulders for a distance of two or three inches, the hairs being here red as on the flanks, but still intermixed with black. In all three also there was a blackish patch on the postero-internal side of the lower leg, but this patch varied in its intensity, and was not visible in the type. The crest in these specimens was much more developed than in the younger example, the hairs on the occiput attaining a length of nearly three inches, and being mixed black and red, owing to the red crown hairs mingling with the black ones of the anterior end of the dorsal black line. These specimens had been taken on the Batang Hupar River, Western Sarawak, in August 1892, by one of Mr. Hose's collectors; and Mr. D. J. S. Baily, a resident in the neighbourhood, had informed Mr. Hose that he had often seen black and red Monkeys, presumably of this form, in the forests of the district. In spite of the confirmation given by these facts, Mr. Hose himself was inclined to think that S. cruciger might be only a red form or " erythrism " of 8. chrysomelas, the common black and white Monkey of Sarawak, in the company of which he believed he had seen the specimen first described by Mr. Thomas. Mr. Hose pledged himself specially to investigate this most interesting question on his return to Borneo. The following papers were read:- 1. A proposed Classification of the Hesperiides, with a Revision of the Genera. By Lieut. E . Y. W A T S O N, Madras Staff Corps, F.Z.S., F.E.S. [Eeceived October 27,1892.] (Plates I.-IIL) The arrangement here proposed is based entirely upon the collection of the British Museum -, therefore only the species represented in the National Collection are referred to their respective genera, those species of which the types are in the collection being marked with an asterisk. A s the time at m y disposal has been strictly limited, only such new genera have been described as differ very markedly from those 1 Ann. Mag. N. H. (6) x. p. 475 (1892). 1* |