1902.] NATURAL SCrEXCES OF PHILADELPHIA. 139 



bb. — Head with four distinct lines extending to a common 

 centre on the crown of the head. Dorsal line distinct 

 on the crown of head, . . c. javanicus E. Geoffrov. 

 aa. — General color rufescent gray. Crown of head with a consid- 

 erable blotch of brown. 

 b. — General tint pale rufescent; dorsal line and crown patch 

 not very distinctly marked and of a rufous tint, the 

 latter involving the eai-s, . c. malaianu-'< Anderson. 

 bb. — General tint deep rufescent; dorsal line and crown patch 

 very distinct and of a deep chestnut tint, the latter 

 not involving the ears, . . . c. natuine n. subsp. 

 bbb. — General color chestnut rufescent, more or less washed 

 with gray; dorsal line very distinct, deeply colored; 

 crown patch large, fading into the general surrounding 



tint, c. hilleri n. subsp. 



Regarding the Teuasserim form^® we can say nothing, as no speci- 

 mens from that region are available. 



Nycticebus couoang hilleri n. subsp. 



1822. Lemur tnrdigradus Raffles (not of Liuii.), Trims. Linn. Soc. 

 London, XIII, p. 247. 



Type, d, No. 6,590, Acad. Xat. Sci. Phila. Batu Sangkar, 

 Tanah Datar, Padangsche Bovenland, Sumatra. August or Sep- 

 tember, 1901. Collected and presented by ■Mr. A. C. Harrison, 

 Jr., and Dr. H. M. Hiller. 



Distribution. — Specimens from the type locality only have been 

 examined, but it is possible the form is found throughout the island. 



Characters. — This form is most nearly related to malainus and 

 javanicus, but diffei*s from the former in the much more strongly 

 marked doi-sal line, and in the predominance of chestnut-brown and 

 not ochraceous in the general tint. Yvoui javanicus it diffei*s in the 

 much less definite head bars, in the broad crown patch and in the 

 gradual transition from the latter to the surrounding tint. 



Color. — General color of the upper parts reddish-cinnamon 

 (between Ridgway's russet and cinnamon), more or less washed 

 with ecru, the more noticeable toward the extremities. Dorsal line 

 very distinct, seal-brown and more or less visible to the caudal 

 region. Crown patch broad, mai-s brown with the four head bare 

 not well marked, all merging gradually into the general hoary tint 

 which suffuses the head ; eyes suiTounded by the customary black 

 ring; interocular stripe clear white; cheeks whitish, sometimes 

 " Vide Blansford, Mavim. Brit. Ind., pp. 45 and 40. 



