ART. 28 REVISION OF DISONYCHA NORTH OF MEXICO BLAKE 41 



Type locality. — Fort Defiance, Ariz, (type female and one para- 

 type in National Museum). 



Distrihution. — Arizona (Fort Defiance) ; New Mexico (Albuquer- 

 que, Kohler Junction, Torrance County) ; Nevada (Lincoln County, 

 White Pine County) ; Utah (Juab County) ; Colorado (Buttes, Den- 

 ver, Fort Collins, Golden, Pawnee, Pingree Park) ; Wyoming 

 (Medicine Bow, Paint Creek, Yellowstone National Park) ; Montana 

 (Assiniboine, Bozeman, Butte, Crazy Mountains, Dillon, Gallatin 

 Mountains, Musselshell) ; California (Macdoel) ; South Dakota 

 (Black Hills, Elmore). 



Remarks. — Typical latifrons from Arizona, as described by 

 Schaeffer, is pale with a dark labrum and a dark occiput behind the 

 eyes, the pronotum has only 2 transverse spots, the elytral vittae 

 are narrow, and the ventral surface is black except the prosternum, 

 middle of mesosternum, and last 2 ventral segments, which are pale. 

 This color form is common throughout the Rocky Mountains from 

 Arizona to Montana. 



DISONYCHA LATIFRONS var. ASTERIS Scha«ffer 



Plate 4, Figure 21 



Disonycha asteris Schaeffee, Journ. New York Ent. Soc, vol. 32, p. 141, 1924 



(Stonewall, Manitoba; type, U.S.N.M. No. 42427). 

 Diaonycha latifrons var. asteris Schaeffer, Journ. New York Ent. Soc, vol. 



39, p. 281, 1931. 



Description. — Of same size and sculpture as typical latifrons^ but 

 darker in markings, frontal tubercles marked by a dark line (but 

 this line not any more depressed than in many specimens of typical 

 latifrons,' prothorax with five large spots, sometimes the two an- 

 terior coalescing; elytral vittae wider than in paler form. 



Type locality. — Stonewall, Manitoba; collected by J. B. Wallis. 

 Type, U.S.N.M. No. 42427, and three paratypes in National Museum. 



Distrihution. — British Columbia (Rolla, Swift Current) ; Alberta 

 (Edmonton, Banff, Leduc, Pincher Creek) ; Saskatchewan (Moose 

 Jaw) ; Manitoba (Aweme) ; Quebec. 



Food plant. — Collected on white aster in a swamp (AVallis). 



DISONYCHA LATIFRONS var. LATICOLLIS Schaeffer 



Plate 4, Fiqukb 22 



Difionycha liiticollis Schaeffer, Journ. New York Ent. Soc, vol. 39, p. 284, 1931 

 (Vv^yandanch, N.Y. ; type in collection of Cliarles Schaeffer). 



Disonycha quinquevittata Whitehead, Nova Scotia Ent. Soc Proc, 1918, p. 38. 

 (Not Altica quinquevittata Say.) 

 Slightly larger than typical western specimens of latifrons, and 



paler, the pronotum usually with only two well-marked small an- 



