20 University of Michigan 



plants ; the other among short grass and occasional clumps of 

 Artemisia in a dry upland pasture. It was one of the least 

 common of the Acrididae in this region. 



Arcyptcra gracilis Scudder. — Lake Upsilon, Turtle Moun- 

 tains, July 15, 1919, I male; Aug. 6, 1920, 10 males, 5 females. 



This species was fairly common in some of the low, moist 

 meadows and grassy marshes bordering the ponds and occu- 

 pying the depressions in the Turtle Mountains. Specimens 

 were also taken in low fields in growths of tall herbaceous 

 plants, such as goldenrod, fireweed, Helianthus, nettles, and 

 others ; in this rank herbage it was especially numerous, but 

 very difficult to capture on account of its habit of dropping to 

 the ground and burrowing into the thickest parts of the tangled 

 mass of vegetation when alarmed. No females would have 

 been taken had it not happened that a low meadow of tall 

 grass was being cut for wild hay, and a large number of 

 specimens of this and other species were crowded into the 

 small patch of uncut grass, sedges, and cat-tails bordering a 

 small pond in the center of the field. In the field the females 

 present considerable superficial resemblance in actions and 

 appearance to large, lubberly females of Melanoplus hivittaUis, 

 the light coloring of the dorsal margins of the closed tegmina 

 adding to the likeness. 



oEdipodinae 

 Arphia pscmlonictana (Thomas). — Devils Lake, Aug. 7-26, 



1919, 3 males, i female; July 20-Aug. 13, 1920, 8 males, 2 

 females ; Sheyenne River, Eddy Co., Aug. 8, 1920, 8 males, 

 7 females; Bottineau, Aug. i, 1920, i male; Fargo, Aug. 31, 



1920, I male; Medora, July 31-Aug. 3, 1920, 6 males, 2 juvenile 

 f eriiales ; Amidon, Aug. 21-28, 1920, 16 males, 7 females. 



This species was common throughout the state on dry grass- 



