278 Proceedings of the Asiatic Society, [No. 3. 



R. C. M., which is noticed in my Catalogue of Birds (No. 69, I,) as " per- 



this is a mere variety of the last. The series of specimens in our museum de- 

 monstrates this beyond further question. 



9. Pr. leucogenys, Temminck. Japan. 



These various races of large c Flying Squirrels' with long and cylindrical tail 

 bear the same relationship together, as do the numerous races of gigantic Squirrels 

 which inhabit the same geographical region, and which were brought together by 

 the late Prof. Temminck by the name Sciurus giganteus. 



The smaller * Flying Squirrels' with flat and distichous tail constitute the genus 



SCIUROPTERA, F. CUV. 



*1. Sc. caniceps, Gray : Sc. senex, Hodgson. From Sikhim. 



2. Sc. Layardi, Kelaart, nobis, J. A. S. XX, 165. Mountains of Ceylon. 



3. Sc. Baberi (?), nobis, J. A. S. XYI, 866. Trans-Himalayan ? 



*4. Sc. fuscocapilla, Jerdon, nobis, J. A. 8. XVI, 867. Malabar. Akin 

 to the next. (A good species since added to the museum.) 



# 5. Sc. fimbriata, Gray : Pteromys Leachii (?), Gray. N. W. Himalaya. 



*6. Sc. albonigra, Hodgson : Pteromys Turnbullii, Gray. S. E. Himalaya. 



*7. Sc. villosa, nobis, J. A. S. XVI, 866. Sikhim, Butan, Asamese moun- 

 tains. 



8. Sc. Horsfieldii ; Pteromys Horsfieldii, Waterhouse : Ft. aurantiacus, 

 Waaler. Malayan peninsula. 



9. Sc. genibarbis, (Horsfield.) Java, Malayan peninsula. 



10. Sc. lepida, Horsfield. Java. N. B. This and the preceding race or 

 species would appeal' to hold the same mutual relationship as Sc. villosa and 

 Sc. albonigra of the S. E. Himalaya. 



*11. Sc. Phayrei, nobis, n. s. : Sc. sagiita of Burma, apud nos, passim. 

 Rangoon, Mergui. Like Sc. albonigra, but considerably smaller, and the 

 tail much less bushy. Length 6 to 6| inches ; the tail (vertebrae) 5i in. ; hind- 

 foot with claws If in. 



*12. Sc. spadicea, nobis, J. A. 8. XVI, 867. Size of Sc. volucella j 

 from Arakan. 



13. Sc. momoga, Temminck and Schlegel. Japan. 



14. Sc. volans ; Sciurus volans, L. : Pteromys sibiricus, Desmarest ; Pt. 

 russicus, Tiedemann. Siberia, Lapland. 



15. Sc. volucella; Sciurus volucella, Pallas: Mus volans, L. ; Sciurus 

 acrobates, Schreber ; Sciuropterus americanus, Desm. N. America. (') 



16. Sc. sabrina j Sciurus sabrinus, Shaw: Sc. hudsonius, Forster. N. 

 America. 



N. B. — The true Sc. sagitta will be a small Javanese species. M. M. Temminck 

 and Schlegel unite under this name Nos. 5, 6, 8, 9 and 10, which can be little 

 more than guess-work. The first three of this series attain to about 2 ft. in total 

 length: No. 12 scarcely exceeding 9 in. 



(') Of this we possess a skeleton. 



