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FIELDIANA: ZOOLOGY, VOLUME 42 



(1952) from Japan in having 3 instead of 2 pairs of long, posterior 

 setae. Also, Asanuma, et at. (1952) pointed out that the Japanese 

 species differs from the Javanese species in having more or less pro- 

 nounced postero-lateral angles of the epigynial plate, and a posterior 

 median projection on the dorsal plate, both of which are apparently- 

 lacking in the Philippine specimen. Except for these differences the 

 Philippine specimen is well in accord with the original description. 



Family DERMANYSSIDAE Kolenati, 1859 

 Genus Steatonyssus Kolenati, 1858 

 Steatonyssus faini, new species. Figure 37, A, B. 



The two subequal dorsal plates with short setae, the thickly 

 sclerotized posterior margin of the sternal plate, and the short peri- 



FiG. 37. Steatonyssus faini, female: A, dorsum; B, venter. 



treme extending to the middle of coxa II are the characteristic fea- 

 tures of this species. 



FEMALE: Chelae slender, tapered apically; first palpal segment with ventral 

 spinelike process. Two subequal dorsal plates, reticulation rather weak; anterior 

 plate 249 n long, 236 /x wide, with 12 pairs of short setae; posterior plate 268 fj. 

 long, 230 n wide, with 9-10 pairs of setae. Three specimens in the series, probably 

 unengorged, have larger dorsal plates. Setae on uncovered dorsum numerous, 

 slightly longer than setae of dorsal plates. Sternal plate about twice as long as 

 broad, strongly reticulate, the anterior margin not well defined, the posterior mar- 



