NOTE ON DipoAomys montanus BAIRD.-Among the mammal types treas¬ 
ured in the collection ot the United States National Museum is 
the type of Baird's Dipodomys mon.an^s , originally described in 
the Proceedings of the Philadelphia Academy of Natural Sciences, 
in 1855, but figured and more fully elaborated in uhat, aaxhor's 
Mammals of North America, published in 1857. This well-marked 
species proves on comparison to be strictly identical with Dipod- 
omys man-tanug elator Merriam, named and described in the Proceed¬ 
ings of the Biological Society of Washington, in 1894; The syn- 
onoray of Pipodomy s montanus v/ill therefore be as follows 
Dipodomys montanus BAIRD, Proc. Acad. Nat. Sci.^ Phila., April, 
1855, p. 334(Fort Massachusetts). 
Dipodomys ordii var. montanus BAIRD, Mammals of North America,1857, 
pp. 410, 411, 757, 762, pi. LXXXIII, fig. 4,a, b, £ (teeth of 
type—-No. - v 1631, 'fa.j youngish adult).Type collected by Captain 
E. G. Beckwi^lM, near Port Massachusetts(»N.M.-On head of 
Rio Grande, in San Luis valley. Altitude, 8,365 feet. Latitude, 
37°- 32' ; longitude, 105°- 23' »). 
Dipodomys elator MERRIAM, Proc. Biolog. Soc. Wash., Vol. IX, p. 
109, June 21,^1894 (type from Henrietta, Clay Co., Texas). 
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