Descriptions and Records of Bees. 21 



ir. — Descriptions and Records of Bees. — XLV. 

 By T. D. A. CocKERELL, University of Colorado. 



Bonibus lateralis wilmattce, subsp. n. 



Worker. — Hair of head black or with a little pale ou 

 front ; hair of thorax very pale yellow^ with a broad blaek 

 baud between wings ; hair of abdomen pale yellow on first 

 dorsal segment, middle half of second^ and a small elongate 

 triangle of yellow (sometimes nearly obsolete) ou middle of 

 third ; the apex of the little triangle points towards the 

 second segment, the yellow of which is eniarginate in the 

 middle. Compared with a worker lateralis from Costa Rica 

 (Bruner) our insect averages distinctly smaller (length 

 about 13 mm.) ; the yellow hair is paler and includes the 

 anterior and posterior parts of thorax above ; the ocelli are 

 distinctly smaller, and the malar space is perhaps a trifle 

 shorter. The brownish wings are the same. 



Hah. Antigua, Guatemala (type locality), six {W. P. 

 Cockerell) ;■ Guatemala City, Guatemala, four {W. P. 

 Cocker ell) . 



The original B. lateralis, Sm., was described from the 

 mountains of Guatemala, at a higher altitude than the 

 localities of loilmattce. I think it is probable that the 

 difference is only racial, the form from the higher altitudes 

 being more melanic. It is the Guatemala City form in which 

 the yellow triangle ou the third segment is evanescent. 



Psithyrus guatemalensis , sp. n. 



^ . — Length about 17 mm.; anterior wing 11^. 



Black, with the elongate obconieal abdomen ; malar space 

 broader than long ; antennae black, the flagellum rather 

 thick, its joints not in the least arcuate ; hair of head long 

 and black, a little pale on lower part of front, that on top of 

 head behind ocelli entii-ely very pale oehreous, but that ou 

 cheeks black ; hair of thorax long and loose, very pale 

 oehreous, a moderate amount of black on posterior middle 

 of mesothorax and middle of scutellum, hair of hind part of 

 pleura (especially a tuft beneath wings) and of metathorax 

 black; tcgulaj with a rufous spot posteriorly. Wings dusky, 

 strongly reddish. Legs with black hair, that on inner side 

 of tarsi dark red except at base ; hind tibiae slender, convex ; 

 hind basitarsi hardly as broad as tibiae. Abdomen shining, 

 with abundant black hair, but a large pale oehreous tuft at 



