24 University of Michigan 



Medora, July 29- Aug. 3, 1920, 3 males, 3 females; Amidon, 

 Aug. 21-23. 1920, 2 females. 



Common along roads and in cultivated fields and sparsely 

 vegetated areas throughout the state. 



Spharagemon aeqiiale TSay)." — Amidon, Aug. 21-28, 1920, 

 35 males, 17 females. 



Common on the grassy uplands in the vicinity of Amidon, 

 but rather local in distribution. Specimens were taken around 

 the sparsely vegetated rocky edges of the mesa top of Black 

 Butte and in bare, dry pastures near the town. It seemed to 

 frequent drier and more sparsely vegetated areas than those 

 preferred by S. collare, and was much less generally distrib- 

 uted than that species. In this region S. collare was frequently 

 entirely absent from areas inhabited by S. aequale, and where 

 the two species were found together the latter in most cases 

 considerably outnumbered the former. 



Spharagemon collare (Scudder). — Devils Lake, Aug. 7-26, 

 1919, 3 females; July 19-Aug. 15, 1920, 2)Z uiales, 22 females; 

 Stump Lake, July 24, 1920, 12 males, 3 females ; Sheyenne 

 River, Eddy Co., Aug. 8, 1920, i female; Lake Upsilon, Turtle 

 Mountains, July 3oAug. 6, 1920, 15 males, 11 females; Bot- 

 tineau, July 31-Aug. I, 1920, 9 males. 12 females; Fargo, Aug. 

 31, 1920, I male; Buford, July 23, 1920, i male; Medora, July 

 29-30, 1920, I male, i female; Amidon, Aug. 21-28, 1920, 23 

 males, 17 females. 



Common throughout the state in dry, grassy fields and sim- 

 ilar situations. In the Turtle Mountains it was common in 

 brushy fields and pastures. At Amidon it was very common 

 on the grassy uplands, but no specimens were taken in the 

 Bad Lands. Triiiierotropis monticola frequently occurs with 



1* Determination verified by A. P. Morse and J. A. G. Rehn; accord- 

 ing to the former, these specimens are "not typical." 



