SCIURUS. 215 



together from the Himalaya, the Malayan peninsula, Pormosa, Central China, and 

 Tibet, however divergent those from the extreme Mmits of distribution may appear, 

 the races from the intermediate localities show a connecting, gradational series. But 

 besides these, there are evidently other and occult causes at work producing local 

 modifications in the pelage of certain species and which are the occasion of much 

 perplexity to the systematist. This is especially observable in such squirrels as 

 S. pygerytlirus, S. pJiayrei, S. blanfordii, S. caniceps, and S.ferrugineus. 



In the f oUowing pages it has been attempted to indicate the transitional phases, 

 varieties, or local races, whichever they may ultimately prove to be, that appear 

 referable to given species, but the following interpretation of the similarities which 

 some of them manifest to certaia species may not be considered as conclusive 

 evidence of their identity, yet the facts generally would seem to prove that the course 

 followed is one in the right direction. 



ScnjBTJS BicoLOE., Sparrmann. 



The Javan Squirrel, Pennant, Hist. Quad. 1793, 3rd ed. p. 143. 



Sciurus iicolor, Sparr. Gotheb. Wet. Sevensk. Handl. vol. i. 1778, p. 70 j Pallas, Hist. Nat. Quad. 



Glir. 1778, p. 377; Gmelin, Syst. Nat. 13th ed. vol. i. 1788, p. 148; Pennant, Hist. Quad. 



3rd ed. 1793, p. 142; Shaw, Genl. Zool. vol. ii. pi. i. 1801, p. 130; Desmarest, Nouv. Diet. 



d'Hist. Nat. vol. X. 1817, p. 105; Mamm. 1820, p. 336, pi. Ixxv. fig. 3 (Schi-eber's figure 



of 8. javensu) ; Kuhl. Beitr. Zur. Zool. und Anat. 1830, p. 68 ; Horsfield's Zool. Eesch. Java, 



1824, plate; Proc. Zool. Soc. 1839, p. 150; Cat. Mamm. E. Ind. Co.'s Mus. 1851, p. 155 



(in part) ; Desmouhns, Diet. Class. d'Hist. Nat. vol. vi. 1842, p. 72; Lesson, Man. de Zool. 



1827, p. 236; Fischer, Syn. Quad. 1829, p. 357 (in part) ; Wagner, Schreber, Siiugeth. Suppl. 



vol. iii. 1843, p. 189 (in part), plate ccxvi. A; MiiUerundSchlegel, Verhandl. 1839-44, pp. 85, 



88 (in part); Schinz, Syn. Mamm. vol. ii. 1845, p. 32 (in part) ; Blyth, Cat. Mamm. As. Soc. 



Mus. 1863, p. 99 (in part). 

 Seiwus javensis, Zimmermann, Geograph. Gesch. 1780, vol. ii. p. 342; Schreber, Saugeth. vol. iv. 



1792, p. 781, pi. 216; Gray, Hand-List Mamm. B. M. 1843, p. 136; Proc. Zool. Soc. 1861, 



p. 137 ; Blyth, Journ. As. Soc. Bengal, vol. xvi. 1847, p. S70. 

 Sciurus albiceps, Desmarest, Nouv. Diet. d'Hist. Nat. vol. x. 1817, p. 105; Desmoulins, Diet. Class. 



d'Hist. Nat. vol. vi. 1824, p. 72; Gray, Griffith's An. Kingd. vol. iii. 1827, plate opposite to 



p. 180. 

 Sciurus lesehenawltii, 'DQsm2xfis.i,M.2,mm.. 1830, p. 335; Horsfield, Zool. Resch. Java; Gray, Griffith's 



An. Kingd. vol. iii. 1827, p. 180, (plate S. alhiceps) ; Lesson, Man. de Zool. 1827, p. 236; 



Pischer, Syn. Mamm. 1829, p. 356; Schinz, Syn. Mamm. vol. ii. 1845, p. 33. 

 Sciurus affinis, B.a&es (nee Horsfd.) Trans. Linn. Soc. vol. xiii. 1822, p. 259; Lesson, Man. de 



Zool. 1827, p. 234; Pischer, Syn. Mamm. 1829, p. 355 (in part) ; Wagner, Schreber, Saugeth. 



Suppl. vol. iii. 1843, p. 202; Schinz, Syn. Mamm. vol. ii. 1845 (in part), p. 44; Blyth, 



Ann. and Mag. Nat. Hist. vol. xx. 1847, p. 314. 

 Sciurus hypoleucus, Horsfield, Zool. Resch. Java, 1824; Cat. Mamm. E. Ind. Co.'s Mus. 1851, 



p. 156; Miiller und Schlegel, Verhandl. 1839-44, pp. 85, 90; Gray, Hand- List Mamm. 



B. M. 1843, p. 137; Wagner, Schreber, Saugeth. Suppl. vol. iii. 1843, p. 189; Blyth, Journ. 



As. Soc. Beng. vol. xvi. 1847, p. 870; Cat. Mamm. As. Soc. Mus. 1863, p. 99. 

 nurus auriventer, Is. Geoff. St.-Hil. Mag. de Zool, 1832, cl. i. pi. v. ; Voy. des Ind. Orient. Be'lan- 



ger, Zool. 1834, p. 150 ; Coulon, Mem. de la Soc. des. Sc. Nat. de Neufchat. vol. i. 1835, p. 



123, pi. ix. ; Gervais, Eyd. et Soul. Voy. autour du Monde, Zool. vol. i. 1841, p. 41 ; Mag. de 



