330 ORTHOPTERA OF NOVA SCOTIA. PIERS. 



Key to Nova Scotian Genera of Gryllin^. 



a. Species small (length of body less than 12 mm.); last joint of maxiUarj^ 

 palpi double the length of preceding one; hind tibiae with long, movable, 

 pilose spines; first joint of hind tarsi without teeth above, or with one 

 row of small teeth " Nemobius, p. 330. 



aa. Species large (length of body more than 12 mm.); last joint of maxillary 

 palpi but little, if any, longer than preceding one; hind tibise with strong 

 immoveable spines; first joint of hind tarsi grooved above, with two rows 

 of teeth .' Grylltjs, p. 337. 



Genus Nemobius (Ground Crickets). 

 Key to Nova Scotian Species of Nemobius. 



a. • Ovipositor distinctly longer than hind femora, very nearly straight; 

 colour blackish or fuscous, with dark lengthwise stripes on occiput. 



26. fasciatus , p. 330. 



aa. Ovipositor distinctly shorter than hind femora, usually more or less curved ; 

 wing-covers reaching tip of abdomen in male, shorter in female, their 

 ground-colour yellowish-brown; dorsal area of pronotum and the legs 

 yellowish-brown more or less mottled with black. . . 27. carolinus, p. 335. 



26. Nemobius fasciatus (De Geer). Striped Ground 

 Cricket. (Short-winged form, sometimes called 



N. fasciatus vittatus (Harris)). 

 Nemobius vittatus. F. Walker, Cat. Derm. Salt. Brit. 



Mus., i, 57, 114 (1869); Nova Scotia, etc.— Do., 

 •Can. Ent., iv, 30 (1872); Nova Scotia. 

 Acheta vittata. Piers, Trans. N. S. Inst. Sc, viii, 410 



(1894); Windsor, N. S. 

 Nemobius fasciatus vittatus. Piers, Trans. N. S. Inst. 



Sc, ix, 210 (1896); Halifax and Windsor, N. S. 



Description. — Size small; head and pi'onotum hairj-; ovipositor straight 

 'or very nearly so and about one-eighth or more longer than hind femora; wing- 

 covers of male cover about two-thirds of abdomen, while those of female 

 ■cover about half of abdomen and have prominent cross- veinlets ; hind wings 

 wanting in both sexes in short-winged form which has sometimes been called 

 vittatus (but are more than twice length of wing-covers and extend, like two 

 tails, to about apex of ovipositor in typical long-winged form fasciatus, whibh 

 latter has not yet been taken here). 



Colour. — Nova Scotian specimens. The general colour of the short- 

 winged form, varies from black to brown-black, the wing-covers and legs 

 somewhat paler, particularly the basal part of inside of hind femora; top of 

 head, between eyes, with three black longitudinal stripes, which are very 

 obscure, or not noticeable, in darker specimens. Walden (Connecticut) 

 and Beutenmuller (New York) say there are four black stripes on the head; 

 but such Nova Scotian specimens as are before me, have only three stripes, 

 when noticeable. Ovipositor blackish. 



