1904.] Allen, Mammals from Tropical America. 67 



palest specimens of the former (chiriquensis Bangs) are not 

 paler than the palest of the hoffmanni series, and the brightest 

 have the upper parts as red, and the tail fringe and ventral 

 surface as deeply reddish orange, as any examples from Costa 

 Rica. (On individual variation in this species see antea, p. 



44-) 



I also refer to 5. hoffmanni a series of 12 specimens from 

 the upper Cauca Valley, Colombia, showing that the form has 

 an extended range to the southward of Costa Rica. 



As stated by me five years since (this Bulletin, XII, p. 17, 

 March 17, 1899), "true astuans and hoffmanni should be 

 recognized as distinct species," an opinion that seems to be 

 shared by Mr. Bangs (/. c., p. 23). 



15. Mus rattus Linn. Seven specimens, Boqueron, Oct. 4, 

 23 , and 29, and Nov. 23-30. Very abundant, with the habits 

 of a wild species, being found remote from towns or the 

 dwellings of man. 



1 6. Megadontomys flavidus Bangs. Five specimens, Bo- 

 quete (hence topotypes of the species), August 19-27. 



17. Peromyscus nudipes (Allen). 



Hesperomys (Vesperimus f) nudipes ALLEN, Bull. Am. Mus. Nat. 

 Hist., Ill, No. 2, 1891, p. 213. La Carpintera, Costa Rica. 



Peromyscus cacabatus BANGS, Bull. Mus. Comp. Zool., XXXIX, No. 

 2, p. 29, April, 1902. 



Ten specimens, Boquete, Chiriqui, Aug. 21-25, mostly 

 young adults. 



Peromyscus nudipes was described in 1891 from a single 

 specimen, preserved in alcohol, collected by Mr. George K. 

 Cherrie at La Carpintera, Costa Rica. Later other specimens 

 (skins in poor condition) were received from Messrs. Cherrie 

 and Alfaro, collected at Jimenez, Isla Nueva (Irazu Range), 

 Santa Clara, and near San Jose. Recently the Museum has 

 received a series of 19 excellent specimens, collected mostly 

 at the Rancho de R. Jimenez, Volcan de Irazu, by M. A. 

 Carriker, Jr., in March and April, 1902. This series is ap- 

 parently indistinguishable in coloration from Mr. Batty's 



