162 Psyche [December 



the name lateralis. Types in the Boston Society of Natural 

 History, American Museum of Natural History and the author's 

 collection. These two forms resemble Bomhiis terrestris moderatus 

 and Psithyrus ashtoni. 



Another form has the dorsum of the thorax more or less black 

 pilose with the middle of the third segment of the abdomen reddish, 

 with long reddish pile. As the latter character applies to san- 

 guinea Will., I will adopt that name, although there is apparently 

 a slight discrepancy in the color of the pile on the thorax. This 

 form I have only from the Rocky Mountain region, Silver Lake, 

 Utah, July 16; top of Las Vegas Range, 11,000 feet, end of June 

 (T. D. A. Cockerell); top of range between Sapello and Pecos 

 Rivers, about 11,000 feet, August (T. D. A. and W. F. Cockerell); 

 Banff, Alberta, July 17, 1902 (Amer. Mus. Nat. Hist.). The 

 reddish band across the abdomen suggests a resemblance to 

 Bombus ternarius, B. huntii, B. melanopygus, B. sylvicola, etc. 



Specimens, which have been referred to V. evecta Walker, rep- 

 resent two quite distinct forms, the typical evecta has the face 

 black, pile on the dorsum of the thorax entirely yellow and the 

 abdomen with a band of yellow pile at the base and another at 

 the tip of the abdomen, pleura yellow pilose. The other form 

 differs in having only a basal band of yellow, the remainder of the 

 abdomen black. To this form I give the name americana. Types 

 in the Boston Society of Natural History and the author's col- 

 lection. It resembles a number of the more characteristic species 

 of American Bombus, including Bombus pennsylvanicus, B. affinis, 

 B. bimaculatiis, etc., and Psithyrus laboriosus. 



Typical specimens of evecta are in the collection of the Boston 

 Society of Natural History from Franconia, N. H. (Mrs. A. T. 

 Slosson), North Adams, Mass., June 14, and Sharon, Mass., 

 June 13. 



The form americana is more widely distributed. Monmouth 

 and Orr's Island, Me.; Hanover, N. H.; North Adams, Great 

 Barrington, Mount Tom, and Auburndale, Mass.; Delaware Water 

 Gap and near Newark, N. J., and Folsom, Pa. 



The Labrador specimens represent an interesting form and 

 were it not for the great variation and wide distribution of the 

 group, I would describe it as a new species without hesitancy. 



