38 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 45. 



h. Wilkinsoni subgroup, approaching helangeri of the chinensis 

 group : 



Tupaia lacernata wilkinsoni, middle portion of Malay Penin- 

 sula, pi. 8, fig. 3, page 52. 



Tupaia lacernata lacernata, Lankawi and Terutau Islands, pi. 

 8, fig. 5, page 53. 



Tupaia lacernata raviana, Butang Islands, pi. 8, fig. 4, page 54. 



Tupaia lacernata obscura. Great Redang Island, page 55. 



Tupaia lacernata longicauda, Perhentian Island, page 56. 



4. Splendidula group. Color various, usually solid, varying from 

 seal brown to bright ferruginous. Color of underside of tail always 

 clear along the central line at least; mammge, 2-2 = 4, 



Tupaia splendidula, Borneo, pi. 10, fig. 11, page 83. 



Tupaia natunse, Bunguran, Natuna Islands, pi. 10, fig. 12, page 85. 



Tupaia lucida, Pulo Laut, Natuna Islands, page 86. 



Tupaia chrysomalla, Siantan, Anamba Islands, pi. 10, fig. 10, 



page 88. 

 Tupaia riabus, Riabu, Anamba Islands, page 88. 

 Tupaia anambse, Jimaja, Anamba Islands, page 89. 

 Tupaia carimatseS Karimata Island, pi. 10, fig. 6, page 98. 

 Tupaia castanea^ Bintang Island, pi. 10, fig. 9, page 90. 

 Tupaia siaca^ Sumatra, pi. 10, fig. 8, page 91. 



5. Discolor group. Underparts rather brightly colored, anterior 

 portion of upper parts ferruginous, posterior olivaceous; mammae, 

 3-3 = 6. 



Tupaia discolor, Banka Island, pi. 9, fig. 4, page 73. 



Tupaia longipes longipes, northern Borneo, page 76. 



Tupaia longipes salatana, southern Borneo, pi. 9, fig. 5, page 77. 



6. Hypochrysa group. Underparts very brightly colored, upper 

 parts darkly olivaceous or brownish; mammae, 1-1 =2. 



Tupaia hypochrysa, Java, pi. 9, fig. 6, page 70. 



Tupaia chrysogaster, Pagi and Nias Islands, pi. 9, fig. 9, page 71. 



7. Montana group. Entire animal a grizzled dark brownish, often 

 with a well-marked black area on back; mammae, 2-2 = 4. 



Tupaia montana montana, Mount Dulit, Borneo, pi. 9, fig. 2, 



page 94. 

 Tupaia montana baluensis, Mount Kina Balu, Borneo, page 95. 



8. Pida group. Back \vith a narrow dorsal stripe; mammae, 

 2-2 = 4. 



Tupaia picta, Borneo, pi. 9, fig. 3, page 96. 

 Remarks. — Tupaia is the most generalized member of the Tupaiidae 

 and, as would be expected, shows the largest number of distinct forms 

 and the widest geographic distribution. It is easy to see how the 

 other members of the family with the exception of Ptilocercus have 

 been derived by relatively slight modifications from Tupaia. 



1 Suggests the montana group. ' Closer to the femiginea group than the others. 



