40 Mr. T. D. A. Cockerell on Bees of the 



cheeks, pleura, base of abdomen, and legs greyish wliite or 

 very pale grey, that of vertex and dorsum of thorax yellowish 

 ocbraceous. Face broad, with erect pale grey pubescence 

 except on clypeus and middle of supraclypeal area, which are 

 bare. Clypeus with elongate irregular punctures, the surface 

 between them striate, the sculpture reminding one of the 

 surface of a strawberry. Supraclypeal area shining, with 

 two longitudinal rows of large subconfluent punctures on each 

 side. Vertex very closely and distinctly punctured. Space 

 between eyes and base of mandibles about twice as broad as 

 long. Mandibles black, with a dark rufous ring, tips blunt, 

 notch a fair distance from tij). Labrum wuth three or four 

 short longitudinal grooves on each side ; no central pit. 

 Antennae wholly dark, flagellum with a very fine sericeous 

 pubescence, first joint of flagellum distinctly longer tlian 

 second. Thorax quite densely pubescent above ; prothoracic 

 spines horizontal, long and slender, easily overlooked amidst 

 the pubescence. Mesothorax moderately shiny, median groove 

 very well marked ; punctures very large and distinct, sepa- 

 rated from each other by intervals about equal to the diameter 

 of one. Pleura shiny, with strong punctures. Enclosure at 

 base of metathorax very short, coarsely longitudinally plicate, 

 bounded behind by a straight transverse keel. Tegulse 

 rufo-testaceous. Wings perfectly hyaline, ncrvures and 

 stigma black. Legs entirely dark, the claws only rufescent, 

 spurs pale brownish. Basal joints of tarsi fairly but not 

 remarkably stout. Pubescence at tips of inner side of tarsi 

 more or less rufous. Abdomen short and stout, hind margin 

 of second segment and slightly of first and third narrowly 

 rufous. Punctuation of first two segments strong and rather 

 close, on a shining surface ; of third extremely fine and small, 

 on a microscopically tessellate surface. No liair-bands, but 

 base of first segment with long hairs. Hind trochanters with 

 a thin long curled brush of beautifully ramose hairs. 



Uab. Las Cruces, N. M., March 23, on liowers of plum. 



(2) Witli dark hairs on thorax, 

 (a) Tegidcc piceous, piinctuatiou very strong and close ; wing's smoky. 



CoIIefes higelovice, sp. n. 



$ . Length 11 millim., anterior wing 7^ millim. 



Very much like C. arinata, but nt once distinguislied if 



attention is given to the following points : — The flagellum is 



entirely dark beneath, at most very obscurely brownish or 



rufescent. The unpuncturcd middle of the supraclypeal area 



