EVOTOMYS 255 



May 28 to June 5, 1908; hind-foot 15-5-16 ram.; condylo-basal length 

 19 (one skull with teeth very slightly worn) to 23-7 mm. General 

 colour of larger specimens exactly as in E. r. shanseitis (adults), collected 

 at the same spot, where it was " much less common than the last," 

 i.e., " C. inez '' — adults usually are less common than young in early 

 June. If further we assume that post-natal growth in " C. inez " 

 enlarges the skull to the same relative degree as in other voles, then a 

 skull with very sHghtly worn teeth measuring 19 mm. may be taken as 

 indicating that a fully adult example would measure not less than 

 27 mm., and that is approximately the measurement of an adult 

 skull of E. r. shanseius. 



(2) " Caryomys nux " : — Based upon twenty-three specimens col- 

 lected in the neighbourhood of the type locality between November 20 

 and December 6, 1909; hind-foot 15-16 mm.; condylo-basal length 

 22-4-23-7 mm.; colour described as darker brown than in " C. inez,"- 

 tail more distinctly bicoloured and averaging slightly longer. These 

 specimens are of about the same age as those referred to C inez; the 

 differences in colour are probably seasonal ; the slightly greater length 

 of the tail is well within the limits of individual or colonial variation. 



(3) " Caryomys era '' : — Based upon four specimens collected at the 

 type locality on April 3, 1910; eleven other specimens from the same 

 district collected between September 13 and October 25, 1911; hind- 

 foot 14-16 mm.; condylo-basal length 20'8-22-9 mm. Colour about 

 as in " C. inez " ; tail longer, 42-51 instead of 31-37 mm. These speci- 

 mens are obviously a little younger than those upon which O. inez and 

 C. 71 ux are based ; in the absence of any other character I am not inclined 

 to attach any systematic importance to differences in the length of the 

 tail in such young specimens ; these differences are not greater than 

 those to be observed in the specimens from Japan, referred to E. r. 

 smithii. 



(4) " Caryomys alcinoiis " : — Based upon thirteen specimens col- 

 lected at the type locality November 20-24, 1910; hind-foot 16-5- 

 17 mm.; condylo-basal length 21 •4-23-4 mm. Colour dusky, hands 

 and feet dark brown; tail blackish above, little lighter below, long as 

 in " C. era " (48-54 mm.). These specimens are evidently still in the 

 first pelage, and as regards colour, they can be exactly matched in 

 the long series of " E. (Phaulomys) smithii " from southern Japan. 



(5) " Caryomys aquilns " : — Based upon six specimens from various 

 localities in Hupeh. Hind-foot 17-20; tail 52-59 mm. The second 

 largest specimen of the series is now in the British Museum (No. 

 13.9.13.3 female); it is obviously quite immature with a condylo-basal 

 length of 23-3 mm., and I can find no character that will distinguish it 

 from " C. eva " or " C. 7inx."- 



Summing up " C. inez " is definitely shown to be a synonym 

 of E. r. shanseius ; with existing materials neither " C fiux," 

 "C eva," " C. ahinous " nor '"C. aquilus'' can be distinguished 

 satisfactorily from " C. inez," and for the present, they must 

 therefore be relegated to the synonymy. But adult material 

 from the various type localities may well show some subspecific 

 differences, in which event one or more of these names will 

 have to be resuscitated for subspecies. 



E. r. shanseius, as represented by adults from the type 

 locality and its vicinity, is a well-marked subspecies inter- 

 mediate between the typical E. r. rufocanus and the subspecies 



