JAMES A. G. REHN AND MORGAN HEBARD 281 



Mandan, North Dakota, VII, 25, 1909, (H.; along stream in rolling hills), 

 2 c?. 



Bismarck, North Dakota, VIII, 9, 1885, 1 cf , [Hebard Cln.]. 



Englewood, Black Hills, South Dakota, IX, (D. A. Haggard), 2 cf, 1 9, 

 [Hebard Cln.]. 



Custer, Black Hills, South Dakota, 1 cf , [Hebard Cln.]. 



Livingston, Montana, VII, 29, 1909, 4500 feet, (R. & H.; beaten from 

 bushes near river), 1 9 . 



Bozeman, Montana, (Wilcox), 1 cf, [U. S. N. M.]. 



Newcastle, Weston County, Wyoming, VII, 25, 1909, 4300 to 4400 feet, 

 (R. ; hills covered with grasses and low plants), 1 c?". 



Fort Fetterman, Wyoming, 1 cf , [U. S. N. M.]. 



Scudderia curvicauda borealis new subspecies (PL IX, fig. 9; PI. X. 



fig. 27.) 



1904. Scudderia curvicauda E. M. Walker, Can. Ent., XXXVI, p. 326. 

 (In part.) [Toronto, Tobermory and Severn River, Ontario.] 



1910. Scudderia curvicauda E. M. Walker, Can. Ent., XLII, p. 351. 

 [Aweme, Manitoba.] 



The records of curvicauda from ''Boreal America" by F. Walker, 

 Provancher, Thomas, Caulfield, Harvey and Ivnight and Scudder 

 up to 1898, apply not to this race but to S. pistillata. 



From the characters of the present geographic race a close re- 

 semblance to S. pistillata results, but that species may be readily 

 separated by the smaller eyes, the much broader tegmina, shorter 

 caudal limbs, much larger tympanal area of the male tegmina and 

 excellent genital characters in that sex. 



The measurements given below, when compared with those of 

 curvicauda curvicauda, show the chief differences upon which this 

 northern race is based. 



Type— 9 ; Aweme, Manitoba. August 19, 1909. (N. Criddle; 

 in tall dry vegetation.) [Hebard Collection.] 



Description of Type. — Similar to curvicauda curvicauda but of smaller 

 size and more compact structure. Pronotal disk broader in proportion 

 to length with lateral angles somewhat more decided. Tegmina broader 

 in proportion to lez^gth (width of same contained in length verj^ slightly 

 more than four times as an average), limbs proportionately shorter. Ovi- 

 positor very similar. 



Allotype— d'; Aweme, Manitoba. August 22, 1909. (N. 

 Criddle; on hillside.) [Hebard Collection.] 



Description of Allotype. — Very similar in proportions to tj-pe. The 

 produced portion of the supra-anal plate is similar to, but somewhat smaller 

 than, that found in curvicauda curvicauda. 



TRANS. AM. ENT. SOC, XL. 



