REHN AND HEBARD 45 



and vulgare occur, Avhich really refer to the present species. Un- 

 less the material on which the record is based is in existence there 

 is, however, little probability of these errors being detected and 

 corrected. 



In the female sex the very robust ovipositor with a straight 

 dorsal outline will readily separate this form from all the other 

 species of the genus except volantum, which, however, has a less 

 robust and less expanded form of the same, although the two 

 species superficially resemble one another in this respect. The 

 form of the cercus in the male sex is very distinctive. The shape 

 of the lateral lobes of the pronotum, and to a lesser degree the 

 shape of the fastigium, will aid in separating both sexes of the 

 present species from vulgare. 



As a rule this species has the ventro-external margin of the 

 caudal femora unarmed, l)ut in the series before us there are 

 three specimens having a single spine on this margin and a single 

 individual having two spines on the same. 



There is an appreciable amount of variation in size in both 

 sexes, but the diagnostic characters are quite constant. 



Distribution. — Covering the grassland areas and liottom lands 

 of the northern United States and southern Canada, extending 

 from at least the vicinity of Montreal, southwestern Maine and 

 eastern Massachusetts, west to the eastern slopes of the Cascades 

 in west-central Washington (Ellensburg) and to northern Cali- 

 fornia (Sisson), south as far as southwestern Connecticut (Stam- 

 ford), southern New Jersey (Winslow Junction), Tennessee, 

 northeastern Kansas (Douglas County), south-central Nebraska 

 (North Platte) and south-central Montana (Billings). 



Specimens Examined: 87; 5.3 cf, 34 9. 



Montreal, Quebec, Canada, VII, 15, (Caulfield), 1 o", [M. C. Z.j. 



Norway, Maine, (Smith), 1 cf, IM. C. Z.]. 



Montgomery, Vermont, VII, 18, 1891, (Morse), 1 d", [Morse Cln.]. 



Stowe, Vermont, VII, 22, 1891, (Morse), 1 9, [Morse Cln.]. 



White Mountains, alpine and valleys, New Hampshire, (Scudder), 8 cf , 3 9 , 

 [M. C. Z.]; IX, 8, 1889, (F. H. Sprague), 1 9, [M. C. Z.j. 



Faneuil Station, Massachusetts, VII, 22, 1892, (Morse), 1 cf , [Morse Cln.]. 



Readville, Massachusetts, VII, 21, 1892, (Morse), 1 cf, 2 9, [Morse Cln.]. 



Stamford, Connecticut, VIII, 22, 1894, (Mor.se), 1 cf , [Morse Cln.]. 



Ithaca, New York, VII, 19, 1904, VIII, 16, 1890, 1 cf , 1 9, [Morse Cln.]; 

 VIII, 4, 1885, 3 cf , [Cornell Univ.]. 



Winslow Junction, New Jersey, VII, 8, 1911, (H. Fox; in hog along tracks 

 of Cape May division R. R.), I cf , [A. N. S. P.j. 



TR.\NS. AM. ENT. SOC, XLI. 



