296 T. D. A. COCKERELL. 



A. chromotricha Ckll. Rio Euidoso. 



A. chromotricha beulahensis Vier. Beulah.* Mr. Viereck now holds that 

 his A. beulahensis is a variety of chromotricha. 



A. chromotricha clypeonitens Ckll. Benlah. Mr. Viereck considers that 

 his A. truncata is identical with clypeonitens (described from Wisconsin), 

 and believes that the latter is a variety oi chromotricha. 



A. occidentalis Ckll. Beulah ; Santa Fe Canon.* This was described as a 

 variety of platyparia Rob. (fragilis Smith), and was later even considerd 

 doubtful as a variety. Upon comparison with a male platyparia from Mil- 

 waukee, received from Dr. Graenicher, I find that occidentalis is apparently 

 a distinct species; known by its larger head, with the eyes diverging be- 

 low, and the sides of the vertex (viewed from in front) presenting a more 

 distinct angle. 



Canadian to Transition. 

 A. hirticincta Prov. Beulah ; San Iguacio. 



Canadian to Upper Sonoran. 



A. argemonis Ckll. Beulah ; S. F. * ; Rio Ruidoso ; Las Valles; San Germino ; 



Pecos; Glorieta, fis. Argemone intermedia; L. V.; Beatty's Cabin (W. P. C). 

 A. helianthi Rob. Beulah (var. % , with hair of thorax bright ferruginous) ; 



Rociada; Pecos; L. V. ; Albuquerque. 



Transition. 

 A. cerasifolli Ckll. S. F.* 

 A. johnsoniana Ckll. Johnson Mesa.* 

 A. xanthigera Ckll. San Ignacio.* 



A. canadensis D. T. (simulata Prov.) San Ignacio. The record relates to A. 

 (dhovirgata Ckll., which Mr. \'iereck says he cannot separate from simulata. 

 A. nitidior Ckll. San Iguacio.* 

 A. semirufa Ckll. L. V. H. S.» 



A. erythrogastra Ashm. Placita. Typ. loc. in Colorado. 

 A. pluvialis Ckll. Placita. Typ. loc. Olympia, Wash. 



Transition to Upper Soiioran. 



A. placitse Ckll. Placita * ; L. V. 



A. cratsegi Rob. L. V. H. S. (a variety) ; Pecos (det. Viereck). 



A. cressoni kansensis Ckll. Placita; Las Valles; both localities are on the 



Gallinas River. 

 A. aureocincta Ckll. S. F. * ; Glorieta, fis. Gntierrezia sarofhne, Aug. 23, % 



(W. P. C.) ; Pecos, Sept. ; San Ignacio. 

 A. mentzelise Ckll. S. F. * ; Pecos. 

 A. porterse Ckll. L. V. H. S.,* and down the Gallinas R. well into the Upper 



Austral. 



Transition to Middle Sonoran. 



A. mimetica Ckll. Placita ■■■ ; Alamogordo, May 26-29 (V.). 

 A. prunorum Ckll. S. F. ; Las Valles; Pecos; Paraje; Johnson Park, July 4, 

 fls. Rosa (Anna Gohrman) ; M. V.* 



