ORTHOPTERA OF NOVA SCOTIA. — PIERS. 273 



Subfamily CEdipodinae (Vertical-faced Spineless Locusts). 

 Size rather large; colour dull brown or grayish; pronotum 

 not extending over abdomen; no spine or tubercle on pro- 

 sternum between front pair of legs; face nearly or quite 

 vertical; median carina of pronotum usually raised as a 

 crest and usually cut by more than one tranverse linear groove, 

 wings usually brightly coloured. Most species are peculiar, 

 in that they stridulate when in flight; the cracking or rattling 

 notes being produced by rubbing the under surface of the 

 wing-covers against veins on the upper front surface of the 

 hind wings. Other species stridulate as in the subfamily 

 Acridince by rasping a series of teeth on the hind femora 

 against a roughened vein of the wing-covers. The winter 

 is passed in the egg state. 



Key to Nova Scotian Gexera of (Edipodin^. 

 a. Disk of hind ■R'ing transparent, not bordered by black; median carina 



of pronotum faintly cut by one sulcus (notch) Camntjla, p. 274. 



aa. Disk of hind wing opaque, coloured. 



b. Disk of hind wing black, bounded by a pale greenish-yellow border, 

 apex smoky and having a few darker spots; median carina of pro- 

 notum cut by one deep sulcus : Dissosteira, p. 278. 



bb. Disk of hind wing yellow, with a broken dark median tranverse 

 band, apex dusky; median carina of pronotum cut by two sulci. 



CiRCOTETTIX, p. 281. 



The student is cautioned that the above verj' artificial 

 key only refers to such genera as have so far been reported 

 from Nova Scotia, and that it will not answer should the 

 number of represented genera be increased here. As it is 

 quite probable that other genera may yet be found in the 

 province, the following key has been extended so as to embrace 

 those of possible occurrence here, the names of which are 

 inclosed in square brackets. 



Key to Genera of CEdipodix^ fouxd or liable to be found ix Nova 



Scotia. 



a. Median carina of pronotum raised as distinct crest and not notched by 

 principal sulcus. (Inner wings bright sulphur-yellow on basal two-thirds, 

 beyond which is a broad curved dusky band with a dark offshoot extending 

 to near base) [Arphia*]. 



*Arphia sulphurea (Fabiicius;. Sulphur-winged Locust. — Common in ipastures in 

 New Encland, north to Maine and southern Ont., and may possibly yet be taken in south- 

 western Nova Scotia. In this species, which is eenerally of a yellowish-brown or brown colour, 

 the median carina of pronotum is not notched at all by the principal sulcus; and the hind wings 

 have the basal two-thirds bripht sulphur-yellow and the outer third covered by a curved dusky 

 band with a dusky offshoot extending to near base. Length, male, IS mm.; female, 27 mm. 

 F. Walker in 1S70 reported (E- sulphurea from Xova Scotia (Cat. Derm. Salt., iv, 731; and 

 Can. Ent., iv, 1872) but his specimen proves on re-examination to be Circolettix verruculalus 

 (see that species). 



