13G ^h\ S. Tlirsf on some ( Vivernu Paradu.iurus, Cynogale, tiiid their allies) have the perineal area provided with seeut-^lands, situated in the male between the scrotum aiul the j)rc|)U('e, which are widely separated. In GaUdictis and Galidia a similar gland is jjrescnt at least in the female, the position of the prepuce beinj^ unknown. In the Hyicnas there is a large sac, receiving the secretion of the anal glands, above the anus, the i)rcpuce is far in advance of the scrotum, and tlie glans penis is long. Finally, Cnjptoproda, which has even been referred to the same family as the Feiidse on account of the misleading character of its dentition, has widely different external genitalia and the anus opening into a hirge sac. Thus, if we set aside Linsung. Evpleres, and Fossa, about which our knowledge is defective, it may be seen that the genito-anal area of the Felidse possesses a combination of characters distinctive of this family of /liluroidea. VIII. — On some 7iew Mites of the Suborder Prostic/mata Ihiny on Lizards. By Stanley Hirst. (Published by permission of the Trustees of the British Museum.) Tni; Acari described below are forms living on lizards, and> v,\\.\i the probable exception of Pimeliaphilus tenuipes, they are all true blood-sucking parasites. The species dealt Avith in tliis preliminary note will be figured and described in detail in a later paper on parasitic mites. Genus Pterygosoma, Peters. Pterygosoma persicus, sp. n. $ . — Body much vider than long. On each side of the anterior end of the dorsum there are two patches of very short plumose hairs ; these patches being almost continuous with one another, the inner one consists of about 5-8 hairs, the outer of 8-16 hairs. Hairs on rest oi dorsum very few in number ; some distance behind the anterior patches of hairs there is a transverse row of four plain hairs, which are short and widely separated from one another ; there are also two or three rather long fine hairs on each side near the margin ; posteriorly there are two more pairs of short plain
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