REPORT OP THE STATE ENTOMOLOGIST 1903 201 



spared without detriment to the general collections, and in return 

 it has been our desire to obtain, so far as possible, species of 

 economic importance in other sections of this country or any other 

 countries, specially those which might develop into injurious pests. 

 A preliminary exchange list was sent out in the early summer, 

 and the results have been very gratifying, since we have been 

 able by this means, to make a number of extremely valuable addi- 

 tions to the state collections. This is specially true in the case of 

 Ooccidae, and was largely possible through the kindness of Prof. 

 V. L. Kellogg of Leland Stanford Jr Uni\ersity, who was able 

 to offer us some extremely desirable Calif orni an and Japanese 

 scale insects in exchange for some of our native forms. Another 

 very desirable exchange was arranged with Prof. F. H. Snow 

 of Kansas University, who sent valuable Diptera and some 

 cotypes, all determined by the noted authority in this group, Dr 

 S. W. Williston. The species, 118 in number, acquired in this 

 manner are listed below. 



SPECIES RECEIVED IN EXCHANGE 



The source of various species listed below, is indicated by 

 superior figures following the author of the species, as follows : 



1, from Prof. C. P. Gillette, Agricultural College, Fort Collins 

 Col.; 2, from Prof. V. L. Kellogg, Leland Stanford Jr University, 

 California; 3, from E. M. Ehrhorn, Mountain View Cal. : 1, from 

 Prof. F. H. Snow, University of Kansas, Law^rence Kan.; 5, from 

 Prof. E. A. Popenoe, state entomologist, Topeka Kan.; 0, from 

 I'rof. H. Garman, Agricultural Experiment Station, Lexington 

 Ky.; 7, from J. G. Sanders, 8, from Prof. Herbert Osborn, both of 

 the Ohio State University, Columbus O. 



Hymenoptera 



Bombus separatns Cress.^ 

 B. sylvicola Kirhy^ 

 B. putuami Cress.^ 

 B. proximus Cress.^ 

 B. nevadeusis Cress.^ 

 B. morrisonii Cress.^ 

 B. mixtus Cress.^ 

 B. jiixtus Cress.^ 

 B. flavifrous Gress.^ 



B. bifarins Cress.^ 

 B. appositus Gress.^ 

 Psithyrus insularis Gress.^ 

 Anthopora vallorum GklU 

 A. urbana Gress.^ 

 A. smithii G)'ess.^ 

 A. occidentalis Gress.^ 

 Synhalonia frater Gress.^ 

 Melissodes obliqiia Say^ 



