DESCRIPTIONS OF NINE NEW MAMMALS COLLECTED 



BY E. W. NELSON IN THE STATES OF 



COLIMA AND JALISCO, MEXICO. 



BY C. HART MERRIAM, M. I>. 



The well known ornithologist, Mr. E. W. Nelson, whose zeal 

 and indefatigable energy have led him to penetrate many remote 

 and little-known regions for the purpose of collecting mammals 

 and birds, and whose efforts have been rewarded by the discov- 

 ery of many new species from the Arctic regions as well as the 

 arid deserts and lofty mountains of the United States has re- 

 cently directed his steps into Mexico, in the interest of the 

 United States Department of Agriculture. 



Diagnoses are here given of nine new mammals contained in 

 the collections sent by him from Colima and Jalisco, in addition 

 to the new genus and species just described (Xeiiotnijs nelsoni).* 

 Illustrations of cranial and dental characters will appear in a 

 later paper. 



Genus Geomys. 



The collection contains three new pocket gophers of the genus 

 Geomys: a small species from the high mountains of Jalisco (6r- 

 nelsoni) ; a large species from the- plain of Colima (G.fumosus), 

 and a large species from the valley of Zapotlan (G. gymnurus). 

 They may be known from the following descriptions : 



Geomys nelsoni sp. nov. 



Type No. Hill old <j\ U. S. National Museum (Department of Agri- 

 culture collection). Froln north slope of the Sierra Nevada de Colima, 

 .Jalisco, Mexico (altitude 1,980 meters, or 0,500 feet), April 11, 1802. Col- 

 lected by E. W. Nelson. (Original number, 2436.) 



Measurements (in millimeters, taken from dry skin of type, 

 slightly overstuffed; this is the largest and oldest of the 



*Proc. Biol. Soc. Wash., vol. vii, Sept., 1892, pp. 159-168. 



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