ORTHOPTERA OF NOVA SCOTIA. — PIERS. 257 



rounded, its median carina projecting very slightly; apex of pronotum 

 in extralimital extended from reaching considerably beyond hind 

 femora, and in abbreviated form reaching only very little beyond 



them 5. arenosum angustum, p. 259. 



Supposing that only two species occur in Nova Scotia, beginners may 



roughly separate them as follows; but too much dependence must not be 



placed on these distinctions, in case other forms should occur here. 



a. Front margin of vertex, viewed from above, distinctly but obtusely 

 angulate 4. granulatum. 



aa. Front margin of vertex very slightly rounded .... 5. arenosum angustum. 



4. Acrydium granulatum Kirby. Slender Grouse- 

 locust. (Long-pronotumed form.) 

 Acrydium granulatum. Gooderham, Proc. Ent. See. 

 N. S. for 19 1(), 23, 27 (1917); Col., Kings, Hants, 



Ann., and Yar. Cos. 



Description. — Form very slender, especially in male. Front of vertex, 

 viewed from above, projecting forward considerably in a distinct but obtuse 

 angle, its median carina i)rojecting but little if any beyond sides; pronotum 

 almost truncate in front, its posterior part long, attenuate, and passing con- 

 siderablj' beyond hind femora in the typical long-pronotumed form (some- 

 times called A. granulatum gfra^iit/a^tiw),* its median carina prominent through- 

 out its length, but not crested; hind wings reaching about apex of pronotum, 

 and with a delicate network of veins. Pronotum and legs finely granulated, 

 and dorsal surface of former with short wTinkles. Readily recognized from 

 our other related species by the i)rominent angulate form of front margin of 

 vertex. 



Colour. — Variable, but usually described by writers as grayish or reddish 

 brown, sometimes blackish, often with a whitish median band along the full 

 length of the pronotum; inner wings in life bluish or bottle-green in colour. 

 A female specimen from Deerfield, Yar. Co., N. S., (3 June, 1915), the only 

 Nova Scotian specimen I have seen, is blackish-brown, with a narrow, cream- 

 coloured border along sides of head and continued along dorsal margins of 

 pronotum; femora dark, with very shghtly lighter transverse bands, and a 

 cream-coloured line along upper edge; tibia? blackish; hind wings transparent, 

 except anterior margin which is dark. 



Measurements. — Male: body, 8.5-18.5 mm.; pronotum, up to 11.5 mm.; 

 hind femora, 6 mm. Female: body, 11-15.8 mm.; pronotum, up to 15.5 mm.; 

 hind femora, 7 mm. (The Deerfield, N. 8., female specimen is 12 mm. from 

 vertex to end of pronotum). 



Range. — Eastern and northern North America, north of about lat. 

 38°: from Nova Scotia, Maine, Montreal, Ont., Man., Sa.sk., Alb., and Van- 

 couver (B. C), south to New Jers., Ind., Kans., and Colo. Probably occurs 

 throughout all of New England, preferring sedgy meadow lands and swales 

 on sandy soil occasionally flooded by rains or freshets and perpetually moist 



Occurrence in Nova Scotia. — This marsh-loving, slender 

 grouse-locust was first reported from western Nova Scotia 

 by C. B. Gooderham in 1917 (Proc. Ent. Soc. N. S. for 1916, 



*A form with the pron >tuin and wings more or leas abbieviated, and in extreme cases 

 n;)t passing the hin'l femora, has sjmetimes been called .4. yranulalurn virieydtam Hancock. 

 It has not been taken in Nova Scotia. 



