Ml-. T. D. A. Cockerell on Dees. 25 



Si/ nhalonia f rater (Cress.), subsp. aragaUi, no v. 



? . — Mandibles entirely black ; eyes in life black ; light 

 parts of abdominal bands very pale ochraceous (not white or 

 ashy) ; shining hind margins of first two segments narrower, 

 and that on third reduced to an extremely narrow streak ; 

 dark apical hairs sooty or seal-brown (not at all ferruginous) j 

 last ventral hair- band deep strong ferruginous^ edged with 

 whitish. 



JIab. Prospect Lake, Colorado Springs, Colo.^ at flowers of 

 Aragallus Lamherti, May 22 ('/'. & \V. Ckll.). 



Synhalonia crenulaticornis (Ckll), subsp. h'ppice, nov. 



(^ . — Averaging perhaps slightly larger; clypeus yellow, 

 except the broad hind border, the upper margin of the yellow 

 therefore with a pyramidal outline; fourth antenna! joint 

 averaging longer. 



Hab. La Cueva, Organ Mts., N. M., prox. 5300 feet, at 

 flowers of Lipjjia Wrightii, Sept. 5 {(J. II. T. Toicnsend) ; 

 also three collected by Prof. Townsend at Dripping Spring, 

 Organ Mts., N. M., Aug. 10. 



Easily known by tlie large amount of yellow on the clypeus ; 

 the middle part of the labrum is also yellow, whereas in true 

 crenidaticornis the whole labrum is black. 



Sphecodes pecoseriHis^ Ckll. 



Cheyenne Canon, Colorado, at flowers of Prunus, May 18, 

 1904, 2 ? (TF. P. Cockerell). 



New to Colorado. The specimens are a little larger than 

 the type. The hair at the end of the abdomen is sooty, and 

 there is a deep constriction between the first two dorsal 

 abdominal segments. 



Agapostemon viridulus (Fabr.). 



Colorado Springs, Colo., at flowers of Tarax icuin tarax- 

 acum, 1 ? , May lO (IF. I\ Cockerell). 



Ileriades gracilior, Ckll. 



Heriadcs graciUvr, Ckll. Ann. & Mao:. Nat. Hist., Aug. 1S97, p. 138. 

 ? Trypetes barbatus, Kobeitsou, Traus. Anier. Eut. Soc. xxix. (11)03) 

 p. 171. 



Females from Las Vegas, New Mexico, at flowers of 

 Convolvulus arvensis, June 17 {Cockerell), and Pecos, N. M., 

 July 15 (IF. P. Cockerell), agree with IJ, gracilior, but also 



