THEODORE H. PRISON 321 



these are black the true color of the mesoph^ura is obliterated, 

 and instead the black of the legs is depicted. I see no more 

 justification for assuming DeGeer's species to be aun'comus 

 than for calling it pennsylvanicus. 



However, because of the fact that there is no ai)solute certainty 

 as to which species pennsylvanicus refers, without recourse to the 

 type, I have adopted the term americanorum for what Franklin 

 calls pe?ins7jhanicus. This is the position taken by Lutz and 

 Cockerell," as the identity of the latter [petuisylvonicus] is too 

 uncertain." 



Psithyrus fernaldae Franklin 



A\'hen Franklin first described this species of Fsifhyni.s, in 1911, 

 he described also in the same article a male of Psithyrus by the 

 name tricolor. At this time Franklin thought it very probable 

 that tricolor was the male oi fernaldnc , as ho says "I am strongly 

 of the opinion that fernaldae is the female of tricolor.'' There 

 were several reasons for this assumption. In the first i)laGe, 

 both tricolor and fernaldae were in many ways structurally unique 

 among the other Psithyrus. In both cases the opposite sex was 

 unknown, a condition which might readily be interpreted to in- 

 dicate that they were the same species, but opposite sexes. 

 Again, the distribution of tricolor and ferunldac corrcspond(Hl in 

 many places. In some localities, however, one form was known 

 and not the other, and Franklin ]iarticularly stresses the fact 

 that 'tricolor has been taken in Colorado while fernaldae has 

 not." Recently I found a specimen of P. fernaldae from Color- 

 ado in a collection of bumblebees sent me for study by Mr. H. L,_ 

 Viereck. This specimen was colle( ted at Duck Lake, (Irant, 

 Colorado, on July 17, 191(5, at ;in allifude of 1 1 ,000 fVot, by 

 Mr. L. (). Jackson. In view of this record and the adiHtioual 

 ones given in another i)art of this jjajier, it seems advisabh' to 

 drop the name tricolor and consider this mah' as the o])])osite 

 sex oi fernaldae. 



Psithyrus insularis ( F. Smith) 



In 1920, Bequaert listed both /'. insularis and /■". considtus 

 Fraidvlin, from Alaska. In this connection the statement of 

 Franklin that cojisnJtus" is most i)robal'l.\' the male of J^. in- 

 sularis'' was mentioned. In 19b"), Shiden published a siiort 



TIi.\\.S. AM. lONT. SOe., XLVIII. 



