82 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.45. 



TUPAIA CUYONIS Miller. 



1910. Tupaia cuyonis Miller, Proc. U. S. Nat. Mus., vol. 38, p. 393, August 19, 

 1910. 



Type-locality. — Cuyo Island northeast of Palawan, Philippine 

 Islands. 



Type-specimen. — In the collection of the Philippine Museum, 

 Manila, Philippine Islands, No. 26, skin and skull of adult male, 

 collected on Cuj^o Island January 15, 1903, by R. C. McGregor and 

 A. Celestino; in good condition. 



Geographic distribution. — Known only from the Cuyo Island. See 

 No. 15 on map on page 75. 



Diagnosis. — Similar to Tupaia mbllendorffi; head and body of a 

 uniformly grizzled oclu'aceous and black coloration, but tail not dif- 

 ferent in color from lower back. Mammse, 2-2 = 4. 



Color. — Type: Upper parts and sides of head, neck, and body a fine 

 grizzle of oclu-aceous and black, the lighter color being slightly in 

 excess, especially along the sides and rump; under parts, including 

 thi'oat and inner side of legs, generally oclxraceous, darker anteriorly 

 and approaching buff posteriorly, the dark bases of the hairs showing 

 through, giving an ill-defined grizzled appearance; outer side of legs 

 essentially like the body, the feet similar, but grizzling finer; shoulder 

 stripe ill defined, buff in color; tail above and below a coarse grizzle 

 of ochraceous and blackish, the darker color slightly in excess above 

 and the lighter color below. 



STcuU and teeth. — These are without special peculiarities, distinctly 

 smaller than those of T. glis ferruginea; brain case relatively wide, 

 rostrum rather short and heavy, arising rather abruptly from rest of 

 skuU. The hypocones of the first and second molars are very poorly 

 developed. (Plate 9, fig. 1.) 



Measurements. — Type: Head and body, 154 mm.; tail, 166; hind foot, 

 41; condylo-basal length, 43; zygomatic width, 24.4; width of brain 

 case, 18; maxillary tooth row, 16.5. The external measurements of 

 the type are somewhat less than those of the majority of specimens, 

 but the cranial measurements are characteristic. For individual 

 measurements see page 83. 



Remarks. — The two species just described, T. mollendorffi and T. 

 cuyonis, are closely related forms but easily distinguished by the 

 tail being grayer than rest of upper parts in the one case and by its 

 being of generally the same color as the lower back in the other case. 

 They appear more closely related to one another than either of them 

 does to T. palawanensis. The skulls of the two forms are essentially 

 alike. There are many things about Tupaia cuyonis to suggest T. 

 javanica. The two are not so very different in size, especially when 

 the skulls are compared. The skulls have tlie same general shape 

 in the two species. The development of the central upper incisors 

 and lower canines is distinctly greater than in most members of the 

 genus, but on the whole rather less than what one finds in good 



