532 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



G. Size slightly smaller; greatest length of skull about 58 mm.'; maHtoid 

 and audital bullae smooth, rounded, and rather inflated. Malay 

 Peninsula, and lowlands of Sumatra malaianus. 



G^. Size slightly larger; greatest length of skull about 61 mm.; mastoid 

 and audital bulla' irregularly grooved, not inflated. 1,500-3,000 

 feet i u Sumatra hilleri. 



NYCTICEBUS COUCANG (Boddaert.) 



1783. Tardigradus roucang Boddaekt, Elenchus animalium, p. 67 (Fide Stone 



and Rehn) . 

 1812. Xj/cfirebus hengalensls E. Geoffroy, Ann. du Mus., XIX, p. 164. 



DUtrihut/on. — The type locality is given by Stone and Rehn as 

 Bengal. It probably ranges throughout Burma and eastern Bengal.'* 



Diagnostic characters. — Size large, greatest length of skull about 63 

 mm.; temporal ridges forming a sagittal crest in old age; upper 

 incisors usually two on each side; face markings indistinct; face, 

 neck, and forearms not conspicuously gray. 



Color. — General color of upper parts of the single specimen at hand 

 similar to Ridgway's buff, becoming dirty grayish al>out the head, 

 neck, and underparts. Four face lines present but indistinct; dorsal 

 stripe extending whole length of back, narrow. 5 to 10 nun. wide, 

 generally similar to Ridgway's cinnamon. 



Skull and teeth. — Skull large, temporal ridges meeting in age to 

 form a sagittal crest. Upper incisors usually two on each side. 



Pleasure in ents. — See table, page 537. 



Specimens examined. — A mounted skin. Cat. No. 14290, U.S.N.M., 

 and its skull. Cat. No. 21179, U.S.N.M., received by the U. S. National 

 Museum in the flesh from Central Park, New York City, in April, 1884. 



Reniarl's. — While no locality is known for the above specimen, yet 

 it seems to agree in size and color with the specimens referred to by 

 Blanford * as the large northern variety. It is distinctly different 

 from Edwards's *■ plate of cinereus^ and from any other specimens in the 

 National Museum. It is generally lighter in color than Audebert's*^ 

 plate. 



NYCTICEBUS CINEREUS Milne-Edwards. 



1867. Niirtirchus ri)ierevf< Milne-P^dwakds, Xouv. Archiv. du Mus., Bull., Ill, p. 

 11, pi. III. 



Distribution. — Vicinity of Bangkok should probably })e regarded as 

 the type locality. Its range is given by Edwards as Siam and Cochin 

 China. 



Diagnostic c/iaracters. — Similar to Nycticebus coucang^ but head, 

 neck, and forearms clear gray and face markings obsolete. 



« Blanford, Fauna British India, Mammalia, 1888, p. 46; and Anderson, Zool. 

 Results Two Expeditions Western Yunnan, 1879, p. 101. 

 ''Blanford, Fauna British India, Mammalia, 1888, p. 46. 

 c Milne- Edwards, Nouv. Archiv. Mus., Bull., Ill, pi. in. 

 c^Audebert, Hist. Nat. des Singes et des INIakis, 1800, pi. i. 



