No. 1626. MAMMALS FROM HASTERN SUMATRA—LYON. 653 
in its distinctly smaller size and greater distance between lateral 
plates of the palate bones. _ 7 
Measurements.—Type, Cat. No. 144324, U.S.N.M., adult male, 
Pulo Tebing Tinggi, and paratype, Cat. No. 1444336, U.S.N.M., 
adult female, Pulo Merbau, respectively: Head and body, 465, 450 
mm.; tail, 490, 460; hindfoot, 85, 80; weight in pounds, 4, 32; in 
kilograms, 1.8, 1.7; greatest length of skull, 98, 96; basal length, 92, 
87; basilar length, 91, 86; palatal length, 52, 51; zygomatic breadth, 
56, 51.5; interorbital constriction, 19.3, 17; postorbital constriction, 
18.3, 15; width of brain case above roots of zygomata, 32, 32.7; max- 
illary toothrow (alveol1), 35, 33.4. 
Specimens examined.—The above two. 
‘ARCTOGALIDIA SUMATRANA, new species. 
1889. Arctogale stigmatica, JENTINK, Notes Leyden Museum, XI, p. 23. 
Type.—Skin and skull of adult male, Cat. No. 144120, U.S.N.M.. 
collected at Makapan, eastern Sumatra, February 19, 1907, by Dr. 
W. L. Abbott. Original number 5054. 
Diagnostic characters A. large member of the Arctogalidia stiq- 
matica group, closely resembling A. stigmatica from Borneo as to 
color, but cranially more nearly related to A. major Miller,* from 
the Malay Peninsula. 
Color—Type: General effect of upper parts varies between smoke- 
gray and mouse-gray, produced by a mixture, almost a grizzling of 
the dark terminal, the light subterminal, and the dark basal portions 
of the hairs. Top and sides of head much darker, blackish, slightly 
grizzled with cream-buff. Ears, feet, and all of tail except terminal 
fifth, blackish. Legs and terminal fifth of tail similar to upper 
parts but darker. Median dorsal stripe only faintly indicated and 
lateral stripes still less evident. The under parts have the general 
effect of a very light smoke-gray. Paratype (Cat. No. 144121, 
U.S.N.M.): This differs from the type in being somewhat lighter 
colored throughout and in having the three dorsal stripes well 
marked. 
Skull and teeth.—The skull and teeth of Arctogalidia sumatrana 
closely resemble those of the Bornean A. stigmata and the peninsular 
A. major, but its teeth are smaller. In form the skull exactly re- 
sembles that of A. major. Both major and sumatrana differ from 
stigmatica in having distinctly wider postorbital regions and broader 
rostrums. A. swmatrana differs from A. major in having the lateral 
plates of the palate bones very closely approximated, distance between 
their outer surfaces, 8.5 mm., while in A. major it is 12.83 mm. (In 
A. stigmatica this distance is 10 mm.) 
@Proc. Biol. Soc. Washington, XIX, p. 25, February 26, 1906. 
