so University of Michigan 



males, 3 females; Amidon, Aug. 22-26, 1920, 7 males, 6 

 females. 



Common in company with the last in nearly all the campes- 

 tral habitats in the eastern part of North Dakota ; while fairly 

 common in moist situations such as marshes, grassy meadows, 

 etc., it seemed to be more typical of dry grassland habitats. 

 In the dry fields and pastures of the eastern part of the state 

 it was usually more numerous than C. fasciatus, and in the 

 western areas was common on the dry plains and in the Bad 

 Lands in the vicinity of Amidon, where fasciatus was not 

 found at all. C. viridifrons was found in the greatest abun- 

 dance on the upper portions of the dry flats around the shores 

 of Devils Lake, where the sandy soil was covered with a sparse 

 growth of tall grasses, liquorice plants, and low shrubbery. 



Decticinae 

 Anabnts simplex Haldeman, var. niaculatus Caudell. — Stump 

 Lake, July 25. 1920, i male; Bottineau, July 31-Aug. i, 1920, 

 5 males; Sept. 12, 1920 (A. H. E^stgate), i male. 



This species seemed to be fairly common on the dry prairies 

 in the eastern part of the state. None were taken in the Red 

 River V^alley in North Dakota, but a male is at hand which 

 was taken at Donaldson, in the valley on the Minnesota side 

 of the river ;-' it is said to be quite common in that vicinity. 

 The specimen taken at Stump Lake was found among a thick 

 growth of dry grasses, clumps of Artemisia and goldenrod, 

 and other herbaceous plants on the dry flats north of the lake. 

 Attention was attracted to it by its very loud stridulation, 

 audible at a distance of over one hundred yards. This con- 

 sisted of sharp staccato notes, repeated in rapid succession at 



-■^ Minnesota : 5 miles west of Donaldson, Kittson Co., July 4. 1920 

 (O. B. Olson), I male. 



