TABLE OF CONTENTS. 



Page. 



LETTER OF TRANSMITTAL 13 



INTRODUCTORY LETTER, BY DR. H. C. YARROW, ACTING ASSISTANT SURGEON, U. S. A., SURGEON 



AND ZOOLOGIST 15 



XJlIMTER I. NOTES UPON GEOGRAPHICAL DISTRIBUTION AND VARIATION WITH REGARD TO THE 

 ZOOLOGY OP THE WESTERN UNITED STATES, AS RELATES MORE PARTICULARLY TO 

 MAMMALS AND BIRDS, BY DR. IT. C. YARROW 23 



CHAPTER II. REPORT UPON THE COLLECTIONS OF MAMMALS MADE IN PORTIONS OP NEVADA, UTAH, 

 CALIFORNIA, COLORADO, NEW MEXICO, AND ARIZONA DURING THE YEARS 1871, 

 1872, 1873, AND 1874, BY DR. ELLIOTT COUES AND DR. H. C. YARROW 35 



CHAPTER III. REPORT UPON THE ORNITHOLOGICAL COLLECTIONS MADE IN PORTIONS OF NEVADA, 

 UTAH, CALIFORNIA, COLORADO, NEW MEXICO, AND ARIZONA DURING THE YEARS 

 1871,1872, 1873, AND 1874, BY H. W. HENSHAW 131 



CHAPTER IV. REPORT UPON THE COLLECTIONS OF BATRACHIANS AND REPTILES MADE IK PORTIONS 

 OF NEVADA, UTAH, CALIFORNIA, COLORADO, NEW MEXICO, AND ARIZONA DURING 

 THE YEARS 1871, 1872, 1873, AND 1874, BY DR. H. C. YARROW 509 



CHAPTER V. SYNOPSIS OF THE REPTILES AND BATRACHIANS OP ARIZONA, WITH CRITICAL AND 



FIELD NOTES, AND AN EXTENSIVE SYNONOMY, BY DR. ELLIOTT COUES, U. S. A 585 



CHAPTER VI. REPORT UPON THE COLLECTIONS OP FISHES MADE m PORTIONS OF NEVADA, UTAH, 

 CALIFORNIA, COLORADO, NEW MEXICO, AND ARIZONA DURING THE YEARS 1871, 



1872, 1873, AND 1874, BY PROF. E. D. COPE AND DR. H. C. YARROW 035 



CHAPTER VII. REPORT UPON THE COLLECTIONS OP HYMENOPTERA MADE IN PORTIONS OP NEVADA, 

 UTAH, COLORADO, NEW MEXICO, AND ARIZONA DURING THE YEARS 1872, 187:!, 

 AND 1874, BY E. T. CRESSON, WITH LIST OP FORMICIDAE, BY EDWARD NORTON 705 



CHAPTER VIII. REPORT UPON THE COLLECTIONS OP DIURNAL LEPIDOPTERA MADE IN PORTIONS OF 

 COLORADO, UTAH, NEW MEXICO, AND ARIZONA DURING THE YEARS 1871, 1872, 



1873, AND 1874, WITH NOTES UPON ALL SPECIES KNOWN TO INHABIT COLORADO, BY 

 THEODORE L. MEAD, AND A LIST OP ALL SPECIES COLLECTED, BY W. H. EDWARDS 737 



CHAPTER IX. REPORT UPON NEW SPECIES OF ZYG-ENID2E AND BOMBYCID^: COLLECTED IN POR- 

 TIONS OF CALIFORNIA AND ARIZONA DURING THE YEARS 1871, 1872, AND 1873, BY 

 RiCHAiiD H. STRETCH 795 



CHAPTER X. REPORT UPON THE COLLECTION OP DIPTERA MADE IN PORTIONS OF COLORADO AND 



ARIZONA DURING THE YEAR 1873, BY C. R. OSTEN-SACKEN 803 



7 



