20 INTRODUCTORY LETTER. 



desired, and to their courtesy and uniform kindness much of the success of 

 the natural history operations is attributable. 



In the special work of preparing the reports relative to its collections, 

 the expedition is under obligations to a number of distinguished scientists 

 for their kind and gratuitous services in the work of identification of the 

 individual specimens. The following are among the large number of the 

 gentlemen in question: 



In the determination of 



Mammals, thanks are due to Prof. S. F. Baird, of the Smithsonian Insti- 

 tution; Prof. Harrison Allen, of the University of Pennsylvania; Dr. Elliott 

 Coues, U. S. A., naturalist of the Northern Boundary Survey; Prof. J. A. 

 Allen, of the Museum of Comparative Zoology, Cambridge. 



Birds, Prof. S. F. Baird; Dr. Elliott Coues, U. S. A.; Mr. Robert Ridg- 

 way, of the Smithsonian; Prof. J. A. Allen; Mr. George N. Lawrence, of 

 the Lyceum of Natural History of New York; Mr. C. Hart Merriam, of 

 the Yale Scientific School; Dr. Thomas Brewer, of Boston; Mr. William 

 Brewster, of Cambridge; Mr. Charles E. Aiken, of Colorado; and Capt. C. 

 Bendire, U. S. A. 



Eeptiles, Prof. S. F. Baird; Prof. E. D. Cope, of the Academy of Natu- 

 ral Sciences of Philadelphia; and Mr. G. Brown Goode, of the Smithsonian. 



Fishes, Prof. S. F. Baird; Mr. G. Brown Goode; Prof. E. D. Cope; 

 Prof. Theo. Gill; Mr. J. II. Milner, of the United States Fish. Commission; 

 Mr. T. Bean, of the Smithsonian; and Mr. M. P. Madsen, of Utah. 



INSECTS. 



Coleoptera, Mr. Henry Ulke, of Washington, D. C.; Dr. George II. 

 Horn, of the Academy of Natural Sciences of Philadelphia; Prof. John L. 

 LeConte, of the Academy of Natural Sciences of Philadelphia. 



Lepidoptcra, Mr. W. II. Edwards, of Coalburgh, W. Va.; Mr. Theo. L. 

 Mead, of Cornell University, New York; Mr. R. II. Stretch, of San Fran- 

 cisco, Cal. 



Orthoptcra, Prof. Cyrus Thomas, of Washington, D. C.; Mr. S. H. 

 Scudder, of Cambridge, Mass. ; Prof. Townend Glover, of the Agricultural 



