THE CANADIAN ENTOMOLOGIST 75 



Canadaj separatus Cr., morrisoni Cr., and the widely distributed 

 and chameleonic rufocinctus Cr. 



A second part of the work treats of the species south of the 

 United States. Here we find as many as twenty species of the 

 Dumoucheli group, if we include the four northern forms, of which 

 two have already been taken in Mexico, sixteen of the Fraternus 

 group, only four of the Pratorum group, and no representative of 

 any other group. 



Dr. Franklin follows five of his groups into the Old World, 

 but thinks that the Auricomus and Fraternus groups are not cer- 

 tainly known to be represented there. He has probably not seen 

 the male of Bombus culliimanus Kirby, a rare and little known 

 European species, of which rufocinctus appears to be the nearctic 

 representative. The name dumoucheli Rad. is not employed by 

 European workers, but it appears to be synonymous with armeni- 

 acus a Central Asiatic form allied to pomorum Panzer, the type of 

 a well known group in Europe. Reference is also made by Dr. 

 Franklin to five other groups occuring in the Old World, but, so 

 far as is known, absent from America. 



The author treats the genus Psithyrus, consisting of the para- 

 sitic bumble-bees in the same thorough and liberal manner as 

 Bombus. Eleven forms of Psithyrus have been separated in the 

 region north of Mexico, but three of these are unpaired sexes. 

 The only record of a Psithyrus from South Amenca is that of F. 

 Smith from Brazil, but Dr. Franklin doubts if it was ever taken 

 there. 



In his work Dr. Franklin introduces new names for six Bombid 

 species north of Mexico and for ten species south of the Mexican 

 border. In the case of some forms the relationships are so close 

 that Dr. Franklin considers "it must be entirely a matter of per- 

 sonal opinion whether they should be given full species rank or 

 considered only a subspecies," a view with which none at this date 

 will quarrel. The author also buries as synonymous a large num- 

 ber of old names. That he is well qualified to do this is evident 

 from the fact that he has seen and examined "practically all of the 

 types of species described by the New World workers on the group." 



The twenty-two plates consist of illustrations of various 

 structures, chiefly camera-lucida drawings of the genitalia and of 



