1886.] THE HUME COLLECTION. ()9 



forming a very handsome ornamentation (82. 3. 9. 5, Junkceylon). 

 This race represents S. concolor, Bly. ^ 



These three forms are all without any marked seasonal change of 

 colour ; but in the next race, which is the original stock living in N. 

 Tenasserim, an entirely different sort of ornamentation has been set 

 up in the form of the assumption, during the rutting-season only, of a 

 brilliant orange-yellow back, the sides and belly still remaining dull 

 grey {S. caniceps typicus, 85. 8. 1. 178). 



Further to complicate matters, the nnrth-western yellow-bellied 

 race (5. caniceps pygerythrus) has again spread southwards and 

 overlapped the range of 8. caniceps typicus, which, being now pro- 

 vided with a highly specialized seasonal change of colour, has driven 

 it to adopt a still further development of its own form of ornamenta- 

 tion, namely, the production of a dark brown stripe between the 

 upper grey and the lower yellow, which shows up the latter in the 

 most brilliant manner possible (S. phayrei, 85. 8. 1. 175, Thatone). 



The original grey S. caniceps has thus, except in the unorna- 

 mented summer race of var. typicus, become entirely extinct, and 

 has been replaced by its variously decorated offshoots. 



With regard to nomenclature I think it is impossible to express 

 the present state of things in a binomial manner, but by using the 

 following trinomials we may perhaps approach more closely to the 

 truth : — 



S. CANICEPS PYGERYTHRUS ^ Gcof. 



(S. hlanfordi\ Bly.) 



No seasonal change ; belly yellow. 



Burma and Pegu. 



S. CANICEPS PHAYRII, Bly. 



No seasonal change ; belly rich orange, with brown lateral stripes. 

 Pegu and N. Tenasserim. 



S. CANICEPS GRISEIMANUS, M.-Edw. 



(*S. inornatus, Gr., S. leucopus, Gr.) 



No seasonal change. Belly pale yellow. Feet white. Black tail- 

 tip nearly obsolete. 

 Cambodja &c. 



1 J. A. S. B. (xxiv. p. 474, 1855), apud Blanford (J. A. S. B. xlrii. p. 161, 

 1878), who in describing the present series of Bankasun specimens belonging to 

 this form says, " These dark oHvaceous forms may perhaps be sufficiently 

 distinct to constitute a local race for which Blyth's name <S'. concolor may be 

 retained, but they are not, I think, i-eally separable from 8. caniceps." Anderson, 

 on the other hand, places S. concolor as a synonym of S. modestus, without any 

 remark ; but pending a renewed examination of the type, I prefer to take Mr. 

 Blanford's authority, as this course enables me to avoid giving the southern 

 race a new name. 



^ The full references to all these names will be found in Br. Anderson's 

 ' Monograph,' pp. 227-253. 



