60 HENRY SKINNER, EDITOR. 



closely punctured, bearing dark hairs. All the segments, the apical one excepted 

 with a pure white, narrow band of appressed pubescence on the apical margins. 

 Black. Apex of mandibles, claws and apical tarsal joint brownish. 



Types. — Coll. Acad. Nat. Sciences, Phila. Type locality, Beulah, 

 N. M., August 27, 1901 (H. Skinner). July 28, Dailey Canon, 

 August 10, 3 % , 1 9 (T. D. A. and W. P. Cockerel!. Related to 

 C. americanus Cress., which, however, has the distance between eyes 

 and base of mandibles shorter. The sculpture of metathorax coarser, 

 the yellowish pubescence and heavier build. The paratypes have a 

 small round dent at base of labruni. The 9 is also smaller than 

 americanus and conspicuous by the brown pubescence dorsally, not 

 ochraceous as in the species cited. One $ , June 30, 1902 and one 

 S , June 29, 1902, Roripa nasturtium (Viereck). One % , August 

 7, 1902, Solidago canadensis var. (T. D. A. Cockered). 



Colletes nigrifrons Titus. 



One 9 , Crew's Mesa, near Beulah, June 29, 1902 (B. Chapman ). 



Colletes zonal iin u. sp. Labrum convex, polished, with a round dent at 

 base, coxa? apparently without spines, spines of prothorax if present, hidden by 

 pubescence. Distance between eye and base of mandibles about one-half width 

 of the latter at base. 



% Length 11 mm. — Front and vertex with distinct close punctures, partly dull, 

 partly shining, with a tuft of pale pubescence along the insertion of antennas, 

 clypeus closely almost conflusntly punctured on the anterior margin coarsely. 

 Cheeks indistinctly punctured, with fine pubescence, darker than that on front 

 where it is whitish. Dorsulum shining, punctures almost uniformly, closely 

 arranged. Mesopleurse more finely and closely punctured than the dorsulum. 

 Thorax rather densely clothed especially on the dorsulum, with pale grayish 

 pubescence, faintly tiuted with ochraceous. Superior face of metathorax hardly 

 defined, rather shining, but with no distinct longitudinal fovese. The funnel 

 shaped enclosure dullish, the lateral planes dull, roughened. Wings clear, ner- 

 vures and stigma dark brown, first recurrent nervure received by the second 

 submarginal cell at about the middle. First two basal segments with fine whitish 

 pubescence finely indistinctly punctured, shining, the following segments similarly 

 sculptured, bearing sparse black hairs. The segments with an apical margin of 

 white appressed pubescence. 



Black. Apex of mandibles and apical joints brownish, these same tarsal joints 

 with bright brownish appressed hairs. 



Type. — Coll. Acad. Nat. Sciences, Phila. Type locality, Beulah, 

 N. M., May 30 (W. P. Cockered). On wild plum. One S . Re 

 minds one of the preceding species to which it is nearly related. 



Colletes «lelo<loiitiis n sp. Labrum with a round dent at base in the 

 middle with a pair of faint impressions laterally. Space between eyes and base 



