4l6 ENTOMOLOGICAL NEWS [NoV., '15 



29. Psithyrus latitarsus Morrill. Creede, Colorado, 8,844 ft. alt., one 



female (S. J. Hunter). 



30. Psithyrus suckleyi (Greene). Creede, Colorado, 8,844 ft. alt., 



three males (S. J. Hunter). 



The following differences, in addition to those given in my 

 monograph of the Bombidae, should be noted as distinguish- 

 ing the females of the three American groups of Psithyrus : 



1. The Laboriosus Group. Females with the sides of the fifth 

 dorsal abdominal segment moderately punctate and its middle portion 

 either impunctate or sparsely or moderately punctate ; the middle 

 portion of the exposed part of the sixth dorsal segment more or less 

 punctate. 



2. The Ashtoni Group. Females with sides of fifth dorsal segment 

 very densely punctate, the dense punctuation extending nearly to the 

 middle line on the hind part of the segment a little in front of the 

 apical margin ; the middle part of the exposed portion of the sixth 

 dorsal segment only sparsely punctate at most. 



3. The Fernaldae Group. Females with fifth dorsal segment im- 

 punctate in the middle, except for a few punctures in front of the 

 apical margin, and sparsely to moderately punctate on the extreme 

 sides ; the middle part of the exposed portion of the sixth dorsal seg- 

 ment practically impunctate. 



In a collection of bumblebees recently received from Mr. A. 

 S. Skorikov, of Petrograd, Russia, and named by him, I find 

 the following interesting records of capture at high altitudes : 

 Bomhiis morawitzi Rad., §, Pamir, Turkestan, 15,000 ft.; 

 Bombus regeli F. Mor., $ , Bucharei, Turkestan, 12,500-13,000 

 ft. I also find that the following species represented in this 

 collection belong to the sub-genus Bombias: regeli F. Mor., 

 niveatus Kriechb., incertus F. Mor. The females of niveatus, 

 incertiis and apollineus Skor. present the most remarkable case 

 of a parallel development in coloration of species not at all 

 closely allied, with which I am familiar, their coloring, espe- 

 cially that of the first two species, being almost exactly alike. 

 They can be readily separated structurally, however. The 

 female niveatus has a long malar space (much longer than its 

 width at the apex — a remarkable character for Bombias), and 

 its ocelli are large and placed considerably below the supra- 

 orbital line, in the narrowest part of the vertex. The female 

 incertus has a short malar space (slightly shorter than its 



