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NO. 2188. MAMMALS FROM ISLANDS OFF SUMATRA— LYON. 449 



RATTUS LINGENSIS BANACUS, new subspecies. 



1903. Mus lingensis Miller, Proc. U. S. Nat. Miis., vol. 26, p. 463, February 3, 1903. 



Type-spedmen.—No. 114294, U.S.N.M., skin and skull of adult 

 male, collected on Pulo Bankam, Banjak Islands, January 19, 1902, 

 by Dr. W. L. Abbott; original number 1434. 



GeograiMc distribution.— Pulo Bankam, Banjak Islands. 



Diagnostic characters. — General coloration rather dull (light mark- 

 mgs on hairs ochraceous buff to dull ochraceous orange; underparts 

 dull whitish, apparently stained; collar nearly always present, dark 

 and light colors of sides and underparts so mixed as to produce a 

 coarse speckled effect. 



Measurements. — Size slightly smaller; head and body of adults, 

 190 to 205 mm.; tail, 160 to 175; hmdfoot, 40 to 43; condylobasal 

 length of skull, 41 to 43; width of braincase, 16.4 to 16.8; maxillary 

 tootlu'ow, 6.4 to 7.4. 



Specimens examined. — Thirteen from Pulo Bankaru. 



Remarlcs. — This rat is very similar to its relative on Tuanku but 

 averages distmctly duller; from typical Battus lingensis it is chiefly 

 distmguished by the coarse speckled appearance of the upperparts 

 and sides, and by its somewhat shorter tail. 



RATTUS LINGENSIS ANTUCUS, new subspecies. 



1903. Mus lingensis, Miller, Proc. U. S. Nat. Mus., vol. 26, p. 463, February 3, 1903. 



Type-spedmen.—^o. 114390, U.S.N.M., skin and sloill of adult 

 female, collected on Pulo Tuanku, Banjak Islands, January 28, 1902, 

 by Dr. W. L. Abbott; original number 1484. 



GeograpTiic distribution. — Pulo Tuanku, Banjak Islands. 



Diagnostic cliaracters. — General coloration moderately bright (light 

 markuigs on hairs ochraceous buff to ochraceous orange), collar nearly 

 always lackhig, imderparts dull whitish, the coarse speckled effect of 

 the Bankaru rat lacking. 



Measurements. — Size slightly smaller; head and body, 175 to 205 

 mm.; tail, 135 to 160; hindfoot, 37 to 40; condylobasal length of 

 skull, 38 to 43; width of bramcase, 15.5 to 17; maxillary toothrow, 

 6.5 to 7.2. 



Specimens examined. — ^Eleven from Pulo Tuanku. 



RemarTcs. — ^This rat is distinguished from its relative on Bankaru 

 by its somewhat brighter color, less conspicuous coarse specklmg; 

 from Rattus lingensis, by its more marked speckling and by its dis- 

 tinctly shorter tail. 



RATTUS LINGENSIS MABALUS, new subspecies. 



Type-specimen.—^o. 121825, U.S.N.M., skm and skull of adult 

 female, collected on Tana Masa, Batu Islands, February 19, 1903, by 

 Dr. W. L. Abbott; original number 2310. 

 65008°— Proc.N.M.vol.52— 17 ^29 



