HENRY J. FRANKLIN. 445 



nest, taken by him and in the same collection, contains only 

 a few specimens. There is a specimen from Ottawa before 

 me, however, which was taken eight inches under ground, 

 and this leads me to believe that the species, sometimes at 

 least, makes nests under ground. 



That the females and males above described should go 

 together, I have the following proofs : 



1. Similarity of appearance . — These females and males resemble 

 each other quite strongly, much more so than they either resemble 

 other males or females respectively. 



2. Corresponding variation. — These females and males both run 

 through a wide range of color variation, and the range of variation of 

 the males is, in general, very similar to that of the females. 



3. Coordination of structure. — The location of the ocelli of the fe- 

 males and the location of the ocelli and form of the eyes of the males 

 are all transitional Bornbias in character. 



4. Concordance of habitat. — The females and males both have the 

 same range of habitat, and they are taken in corresponding numbers 

 in different parts of that range. 



Prof. Cockerell has kindly loaned me a cotype of iridis, 

 and it is a form of rufocinctus beyond doubt. Prof. Cock- 

 erell's description of B. prunellce was based upon specimens 

 of two distinct and not at all closely allied species. Some 

 of the cotypes evidently belong to a valid new form of the 

 Pratorum group, and I am, in this paper, calling this form B. 

 cockerelli. The specimen of prtinellce in the United States 

 National Museum, marked distinctly as the type and further 

 labelled "White Mts., N. Mex., Rio Ruidoso, about 7600 ft. 

 alt.," together with some of the cotypes deposited in the 

 collection of the American Entomological Society, represent, 

 beyond a doubt, a subspecies of rufocinctus, as above noted. 

 As the name of a species must go with the type specimen, 

 where such is indicated, I have placed prunellcB in the syno- 

 nomy of rufocinctus. 



With the exception of niexicensis and of kenshawi, rzcfocinc- 

 tus seems to have no very close allies in North America ; 

 on the basis of the structure of the genitalia, B. crotchii seems 

 to come next nearest. 



The yellow pile of this species varies considerably in 



TRANS. AM. ENT, SOC. , XXXVIII. 



