44 Mr. T. t). A. Cockerell on Bees of the 



punctured. Antennaj reaching to base of metathorax ; fla- 

 gellum dark, only faintly brownish beneath. Mesothorax 

 shining, with distinct but sparse punctures. A short pro- 

 thoracic spine. Scutellum siiining, its hind third closely 

 punctured. Base of metathorax shining, bounded by a ridge, 

 and separated into quadrate spaces by irregular longitudinal 

 ridges. Posterior truncation shining, the lateral areas 

 sparsely pitted and clothed with long beautifully plumose 

 hairs. Tegul^e testaceous, edges paler. Wings perfectly 

 hyaline ; nervures and stigma dull testaceous, subcostal ner- 

 vurc black. Legs black, with sparse white pubescence ; tarsi 

 obscure brownish. Abdomen shining, first segment sparsely 

 punctured, the following segments not so sparsely but more 

 obscurely ; first segment with long dull white hairs, replaced 

 on following segments by short inconspicuous pubescence, 

 nowhere anything but white. Pubescence of apex white. 

 Segments 1 to 6 with very distinct apical bands of white 

 pubescence, which are continued narrowly on venter. 



Bab. Mesilla Park, N. M., June 2, 1896, on flowers of 

 Dalea scopana. Also Las Cruces, N. M., in the town, 

 June 9, 1894. 



This must be very near to C. producfa, Pob., d , but that 

 has black tegulas, and the scutellum is ditferent. 



(2) Distance between eyes and base of mandibles less than breadth of 

 latter ; much less except iu the vernal species. 



(«) Pubescence of thorax .sliort, the hairs stout, pubescent, moss-like; 

 abdominal bands broad and appressed ; tips of mandibles blunt. 



CoUetes aberranSj sp. n. 



$ . Length about 11 millim. 



Black, with short, tolerably dense, pale ochreous pubes- 

 cence. Head rather broad, vertex depressed ; clypeus ])romi- 

 nent, practically bare, with punctures running into grooves ; 

 face above clypeus with short ochreous pubescence ; vertex 

 "with a very few large punctures on a surface which appears 

 granular from an exceedingly minute ])unctuation ; ocelli 

 large ; checks with short pubescence, that on occiput some- 

 what longer, not at all mixed with black. The occipital 

 hairs at first seem sim])le, but a strong lens shows that they 

 arc minutely feathered all the way up. Antennae wiiolly 

 dark. Mandibles strongly grooved without, medially sub- 

 rufous, very blunt at tijjs, with the notch a fair distance from 

 the end. Labrum with no distinct median pit. Thoracic 

 dorsum densely covered with pubescence except a central 



