TABLE OF CONTENTS. 



Officers and Committees for b»i2 iii 



Proceedings for L912 vii 



Description of a New Water Mongoose Erom East Africa, by 

 X. Hollister 1-2 



Notes on the Distribution of some Colorado Mammals, by Ed- 

 ward R. Warren 3-8 



A New Weasel from Costa Rica, by E. A. Goldman 9-10 



Three New Phloethripidae (Thysanoptera) from Texas ami 



Michigan, by J. Douglas Hood 11-1(1 



Seventeen New East Indian Crinoids belonging to the Families 

 Comasteridse and Zygometrida?, by Austin H. Clark 17-28 



A New Species of Dennacentor and Notes on other North 

 American Ixodidse, by F. C. Bishopp 29-38 



Professor Robert Collett on Pterycombus hrama Fries, by R. \V. 



Slmfel.lt 39-50 



A New Carex from Alberta, by Kenneth K. Mackenzie .... 51-52 



The Status of Bulorides brune&cent (Lembeye), by Harry C. 



(tberholser 53-56 



Two New American Pikas, by N. Hollister 57-58 



Two New Murine Rodents from Turkestan, by (ierrit S. 



Miller, Jr 59-60 



New Genera and Species of North American Thysanoptera from 

 the South and West, by J. Douglas Hood 61-76 



Six New East Indian Crinoids belonging to the Family Chari- 



toinetridse, by Austin H. Clark 77-84 



A New Puma from Lower California, by. I. C. Phillips .... 85-86 



Descriptions of some New Species and Subspecies of Birds from 

 Tropical America, by Robert Hidgway S7-!)i' 



General Notes <»:;-!M; 



The Trinidad Opossum on Martinique, by X. Hollister, 93 : 

 The Mona Monkey on the Island of St. Kitts, by X. Hollister, 

 93; Two Genera of P>ats New to Middle America, by E. W. 

 Nelson, '.>'■'>; The Generic Names Cercomys and Proechimys, 

 by E. A. Goldman, 94; Fossil Crocodiles from the Canal 

 /one, by ( '. \V. ( iilmore, 94 ; The Names of Two North Ameri- 

 can Wolves, by Gerrit S. Miller, Jr., 95. 



Diagnoses of some New Genera of American Birds, by Robert 

 Ridgway 97-102 



Descriptions of Five New Birds from the West Coast of Sumatra, 

 by Charles W. Richmond 103-106 



(v) 



