184 AMERICAN HYMENOPTERA. 



tance from the supra-orbital line toward the bases of the an- 

 tennae, the lateral ones being separated from the margins of 

 the eyes by less than their own diameter ; the hind meta- 

 tarsi of the male have fringes of long hairs on their poste- 

 rior borders. On the other hand, however, the clypeus of 

 the queen and worker is finely and evenly punctate over its 

 entire surface as with the species of the Atiricomus group, 

 and the third antennal segment of the male is nearly equal 

 in length to the fourth and fifth taken together, 



Vorticosus may belong to the Auricomus group or it may 

 represent a group not found in the New World. 



From Schmiedeknecht's figure of the male genitalia of 

 mendax and from my own examination of the genitalia of 

 confusus, I am sure that those two species represent two 

 groups not present in the New World. The Coiihisus group 

 seems more nearly allied to the Auricomus group than to the 

 Fraternus group. 



B. Subgenus Bombus. 



1, DuMoucHELi Group. 



dumoucheli Rad., from southern Siberia (Irkutsk and Nerchinsk). 



2. Pratorum Group. 



alticola Kriechbaumer. 

 ? consobrinus Dahlbom. 



haematurtis Kriechbaumer. 



hypnorum (L.). 



lapponicus (F.). 

 ? modestus Eversmann. 



pratorum (L.). 



jonellus Kirby. 



ussurensis Rad. 



I have examined the male genitalia of lapponicus (taken 

 from a specimen determined by Schmiedeknecht). As the 

 descriptions and figures, given by Radoszkowski (Bull. Soc. 

 Natural. Moscou, LIX, 1884, pp. 59-62 and plates) and Sch- 

 miedeknecht (Apid. Europ., I, P. 5, 1883), of the genitalia 

 of the males of alticola, haematurjis, hypnorum, pratortim, 

 jonellus (= scrimshiranus) and ussurensis agree, I have no 

 hesitation in placing these species in this group. Conso- 

 brinus and modestus, if Radoszkowski (Bull. Soc. NaturaJ. 



