38  Fretp Museum oF Natura History — Zoétocy, Vor. X. 
arduous trip to it. The short visit to El Guayabal was arranged for 
us by Messrs. Kohler and Boué, German business men of Cucuta. 
To Mr. Boué we were indebted also for other courtesies. Sr. Don Jose 
Osorio, a prominent citizen of Maracaibo, went with us to the Empalado 
Savannas and performed various services for us in Maracaibo. 
In identifying the collection of mammals, it has been necessary to 
borrow specimens from the U. S. National Museum, the American 
Museum of Natural History, and the Museum of Comparative Zoology. 
In addition, specimens were sent to the British Museum for compari- 
son, since it is the unfortunate fact that all American institutions com- 
bined have not as yet sufficient material from South America to insure 
satisfactory identification of specimens requiring only a few weeks to 
gather. The cordial codperation received from the officers of these 
institutions is most gratefully acknowledged. Special mention of 
courtesies received from particular individuals will be found else- 
where. ; 
For the final preparation of the accompanying map, I am indebted 
to Mr. A. B. Walcott, Assistant in the Department of Zoology, Field 
Museum. 
Cznolestes obscurus Thomas. Dusky Cenolestes. 
Eleven specimens, Paramo de Tama, head of Tachira River, Col- 
ombia and Venezuela. 
Being fortunate enough to find the home of these most interentiig 
and little known animals, we made every effort to secure as mahy 
as possible, but after a month’s work our series was still quite small. 
‘ A limited amount of material for study of the osteology and gross 
anatomy was preserved and this it is hoped may form the basis of a 
- subsequent paper to include also a discussion of habits and rela- 
tionships. 
One of our specimens was submitted to Mr. Thomas of the British 
Museum, who pronounces it specifically identical with C. obscurus from 
Bogota, agreeing in color and cranial characters and only showing such 
differences in proportions as are doubtless due to the unreliability of 
measurements taken from native-made skins. External measurements 
of 5 males average: Total length 240.6 (235-251); head and body 119.2 
(113-135); tail vertebrae 121.4 (118-126); hind foot (c. u.) 23.5 (23-24.5). 
Of 5 females: 223 (209-230); 107.6 (106-113); 115.4 (103-121); 22.5 
(22~23). 
