26 University of Michigan 



of a small alkali lake on the grassy upland near the town; 

 here they were common on the alkali-crusted flats among scat- 

 tered tufts of grass and other low plants. Both red and yel- 

 low-winged forms occurred together in about equal numbers ; 

 of the 25 specimens captured, 15 have red and 10 yellow wings. 

 The species was evidently local in occurrence in this region, 

 as it was not found elsewhere in a week's collecting in the 

 vicinity. 



Mestohrcguia kiozva (Thomas)-.^'' — Devils Lake, July 8-15, 



1919, 3 males, i female; July 19-Aug. 16, 1920, 22 males, 15 

 females ; Stump Lake, July 24, 1920, 6 males, S females ; 

 Sheyenne River, Eddy Co., Aug. 8, 1920, 2 females ; Lake 

 Upsilon, Turtle Mountains, July 30-Aug. 6, 1920, 7 males, 3 

 females; Bottineau. July 31-Aug. i, 1920, 5 males, 10 females; 

 Buford, July 23, 1920, 5 males, 5 females ; Williston, July 24, 



1920, 4 males, i female; Medora, July 29-Aug. 3, 1920, 155 

 males, 128 females; Amidon, Aug. 21-27, 1920. 27 males, 24 

 females. 



This species occurred throughout the state ; it was extremely 

 abundant on the western plains, but somewhat less numerous 

 in the east. It was fairly common in grassy fields and pas- 

 tures, roadsides, cultivated fields, and on the stony and sandy 

 flats around the margins of the lakes in the Devils-Stump 

 Lake region. On the western side of the state it was the most 

 aVjundant of the bare-ground Oedipodinae in all of the locali- 

 ties where collecting was done. Its favorite habitat api)ears 

 to be the dt}' uplands, where a considerable amount of bare 

 soil is exposed among the scanty vegetation of grasses and 

 xerophytic plants. 



Great variability of color and color pattern exists iu this 



'^■' Determined by J. A. G. Rehn. 



