new Mites living on Lizards. 137 



hairs (one pair placed behind the other) ; finally, two pairs 

 of sh(jrt plumose liairs situated near the posterior margin, 

 those o£ the inner j)air being placed on either side of the 

 genital aperture. On each side of the posterior margin 

 there is a fringe of about nineteen or twenty very long 

 hairs, which are quite fine, not being feathered or modified 

 in any way. Venter with only four pairs of fine plain hairs, 

 which are of moderate length. There is also a tuft of 

 eleven very long fine hairs on each side of the genital 

 aperture. Legs slender and of moderate length ; coxse 

 unarmed, being furnished with long fine hairs. 



Length of body "6 mm. ; its width 1'15 mm. 



Hab. Sixty miles north-west of Kermanshaw, Persia ; 

 a few specimens found under the scales of the tail of 

 Agamu nvpta. 



Pterygosoma melanus, sp. n. 



? . — This species is not so wide as compared with its length 

 as is usually the case in the genus. On each side of the 

 anterior end of the dorsum there is a band of short slender 

 plumose hairs. Plairs on the rest of the dorsum verv few 

 in number and widely separated from one another ; some 

 distance behind the anterior margin there are two pairs of 

 racket-shaped hairs arranged so as to practically form a 

 transverse row, and a little further back there is another 

 pair of similar liairs. Posterior margin furnished with a 

 fringe of about 18-22 hairs, which are rather short and 

 paddle-shaped, the basal portion being short and cylindrical, 

 but the rest of the hair flattened so as to form a rather wide 

 blade-like expansion, which is striated. Hairs on venter 

 very few in number, a pair of short plain hairs being 

 situated immediately behind the mouth-parts, and another 

 pair of similar hairs in the middle of the body ; posteriorly 

 there are two more pairs of hairs, which have the distal end 

 plumose. Legs slender and rather short; coxse unarmed, 

 being furnished with quite fine plain hairs. 



Colour (spirit-specimens) usually black, but sometimes 

 paler. 



Length of body '72 mm.; its width I'l mm. 



Hub. Deelfontein, Cape Colony ; several specimens found 

 under axillae and ventral folds of neck of Agama atra. 

 Klipfontein, Damaraland ; two specimens found" on the 

 same host. 



