Occasional Papers of the Museum of Zoology 37 



weed and goldenrod, interspersed with small, grassy areas. 

 This species and M. in. atlanis occurred together here in about 

 equal numbers. M. hruncri was not taken elsewhere in the 

 state, though some of the larger, heavier-bodied females of 

 M. in. atlanis taken in the grain fields at Bottineau were mis- 

 taken for this species in the field. 



Melanophis mexicanus atlanis (Riley). — Devils Lake. Jnly 

 25-Aug. 8, 1919, 4 males, 2 females; July 19-Aug. 17, 1920, 

 24 males, 17 females; Stump Lake, July 24, 1920, i male; 

 Sheyenne River, Nelson Co., July 25, 1919, i male; Lake 

 Metagoshe, Turtle Mountains, July 16, 1919, i male, i female; 

 Lake Upsilon, Turtle Mountains, July 30-Aug. 6, 1920, 29 

 males, 18 females; Bottineau, July 16, 1919, 35 males, 17 

 females; July 31-Aug. i, 1920, 20 males, 23 females; August, 

 1920 (A. H. Eastgate), i male; Buford, July 2't,, 1920, 24 

 males, 24 females; Williston, July 24-25, 18 males, 14 females; 

 Medora, July 29- Aug. 3, 1920, 34 males, 47 females ; Amidon, 

 Aug. 21-28, 1920, 59 males, 45 females. 



This species was probably the most abundant grasshopper 

 occurring in the state. It was found in greatest numbers in 

 dry fields of tall grass and on cultivated land, being especially 

 abundant in grain fields. It occurred, however, in a consider- 

 able variety of habitats. In point of view of destructiveness 

 this species surpasses all others in North Dakota. At Botti- 

 neau an examination of some of the devastated grain fields 

 in the vicinity showed that this species outnumbered all others, 

 although it was accompanied by great numbers of Melanophis 

 bivittatus and Camnida pelhicida. 



Melanophis dawsoni (Scudder). — Devils Lake, July 23- 

 Aug. 26, 1919, 4 males, 12 females; July 19-Aug. 15, 1920, 

 37 males, 2i7 females ; Stump Lake, July 24.-2^, 1920, i male, 

 3 females; Sheyenne River, Nelson Co., July ,^5, 1919, i male, 



