Occasional Papers of the Mnseuin of Zoology 21 



land and sparsely vegetated soils during the latter part of the 

 season. 



Chortophaga viridifasciafa (DeGeer).^Stump Lake, July 

 24-25, 1920, 3 males, i female; Devils Lake. May 7-1 1, 1921 

 (N. A. Wood), 3 females. 



A few specimens were taken on the sparsely vegetated flats 

 on the south shore of Stump Lake in the latter part of July, 

 but by this date the species seemed for the most part to have 

 disappeared. Mr. Wood found it common in similar situa- 

 tions on the shores of Devils Lake in May, in company with 

 Hippiscus apiculatus. 



Encoptolophus costalis (Scudder).^- — Devils Lake, Aug. 26, 

 1919, I male, i female; July 22-Aug. 16, 1920, 22 males, 12 

 females, 3 juveniles; Sheyenne River, Eddy Co., Aug. 8, 1920, 

 2 males, 8 females ; Aug. 8, 1920, 2 males, 8 females ; Stump 

 Lake, July 24, 1920, 6 males, 4 females, 2 juveniles; Bottineau, 

 Aug. I, 1920, I female; Sept. 12, 1920 (A. H. Eastgate), i 

 female; Fargo, Aug. 31-Sept. 2, 1920, 6 males, 3 females; 

 Medora, July 29, 1920, 2 females; Amidon, Aug. 21-28, 1920, 

 16 males, 14 females, 2 juveniles. 



This species apparently matures in the eastern part of the 

 state in the latter part of July. On July 22 nymphs were 

 very abundant at Devils Lake, but the only adults seen were 

 three teneral specimens ; a week later adults were common, 

 though many were still found in the teneral condition. The 

 species was quite generally distributed in North Dakota on 

 dry, sparsely vegetated soils ; it was common in dry pastures, 

 waste lands, and on the flats around the lake shores in the 

 east, while in the southwest it was abundant on the uplands 

 and on grassy slopes and ridges among the Bad Lands. One 



1- Determined by J. A. G. Rehn. 



