256 ORTHOPTERA OF NOVA SCOTIA. PIERS. 



Dr. E. M. Walker of Toronto and Mr. J. A G. Rehn of 

 Philadelphia confirm the determination of these specimens. 

 The extended form, sometimes designated N. cristatus 

 carinatus Scudder, in which the pronotum is further prolonged 

 (measuring 9.8-11.5 mm. in male, and 9.5-10.7 mm. in female), 

 has not so far been met with in Nova Scotia. The species 

 has, I believe, onh^ once before been reported from Canada, 

 Caulfield having taken it {Batrachidea cristata) at Toronto, 

 Ont. (Can. Rec. Sc, ii, -102, 1887). Bayard Long did not 

 observe it on Prince Edward Island, so that this may be 

 the northern limit of its range. 



It is an active little species, jumping vigorously with 

 its thick hind femora, as one will find out on attempting 

 to capture it; and its very small size and inconspicuous colour 

 when on the ground, make it extremely difficult to detect 

 and capture. It appears, like allied species, to frequent 

 dry, sandy soil, lighth' covered with fine debris, and dry 

 • sunny banks in scant pastures. In New England, where 

 it is locally common, it is found, according to Morse, on 

 light soils, but especiall}^ in dry pastures. 



Key to Nova Scotian Species of Acrydium. 

 {A. omatum is included for comparative purposes and because it is 

 liable to occur.) 



Median carina of pronotum low, its dorsal outline rather flat when viewed 

 from side; upper lateral sinus of pronotum nearly as deep as lower one 

 {Acrydium). 



a. Median carina of pronotum more or less distinctly elevated along 

 entire length; dorsal surfaces of pronotum higher in middle, sloping 

 on sides. 



b. Body very .slender, especiallj^ in male; front margin of vertex 

 obtusely ungulate when viewed from above, its median carina 

 not projecting or only very slightly; hind part of pronotum 

 long-drawn-out, its apex narrowly acute, in extended form 

 surpassing hind femora and in extralimital abbreviated form 



reaching near their end 4. granulatum. p. 257. 



[bb. Body more robust; front margin of vertex rounded, its median 

 carina distinctly projecting; apex of pronotum in extended 

 form considerably surpassing hind femora and in abbreviated 



form {(riangulare) reaching about their end omatus 



(See nomenclatural remarks under arenosum anguslum) .] 

 aa. Median carina of pronotum indistinct, a little elevated on its anterior 

 third; dorsal surface of pronotum flat or nearly so; body rather 

 robust in abbreviated form; front margin of vertex very slightly 



