SCIUEUS. 215 



together from tlie Himalaya, tlie Malayan peninsula, Eormosa, Central China, and 

 Tibet, however divergent those from the extreme limits 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. phayrei, S. blanfordii, S. caniceps, and S.ferrugineus. 



In the following 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 certain 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. 



SciURTJS BICOLOR, ^parrmann. 



The Javan Squirrel, Pennant, Hist. Quad. 1793, 3rd ed. p. 14^. 



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



Glir. 1778, p. 377 j 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. 18-20, p. 336, pi. Ixxv. fig. 3 (Schreber's figure 



of S. javensis) ; Kuhl. Beitr. Zur. Zool. und Anat. 1820, p. 68; Horsfield^s Zool. Eeseh. Java, 



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



(in part) ; Desmoulins, 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, Saugeth. Suppl. 



vol. iii. 1843, p. 189 (in part), plate ccxvi. A; MiiUer und Schlegel, 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). 

 Sciurus 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 ^(?5c/ze^a2^^i5w', Desmarest, Mamm. 1820, p. 335; Horsfield, Zool. Resch. Java; Gray, Griffith-'s 



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



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

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



Zool. 1827, p. 234; Fischer, 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; Mliller 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. 

 Sciurus auriventer. Is. Geoff. St.-Hil. Mag. de Zool. 1832, cl. i. pi. v. ; Voy. des Ind. Orient. Belan- 



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 



