206 BRITISH ORTHOPTERA. 



(a). Elytra and wings de- 

 veloped . . . C. elegant. 

 (/3). Elytra abbreviated in 

 female ; wing ahortive 

 in both cases . . C. 

 (ii). Antennas clubbed. 



1. Colour somewhat uniform brown ; 



costa arched at the base ; clubs 

 pronounced, whitish at tip . G-. rufus. 



2. Smaller ; spotted and varying 



much ; costa unarched at base ; 

 clubs less pronounced ; not white 

 at the tip . . . . Gr. mnculatus. 



B. Pronotum covering the abdomen ; no pad 

 between the tarsal claws ; species very 

 small. 



(a). Stout; pronotum extending to tip of 

 hind femora ; ridge of pronotum 

 elevated ; two black spots some- 

 times present . . . . T. bipunctatu 

 (b). More slender; pronotum extending 

 well beyond the tip of hind femora ; 

 ridge less pronounced . . T. subulatus. 



Genus 1. TETBIX Latr. 



(GROUSE LOCUSTS.; 



Gryllus BuUa LINN. Syst, Nat, (eel. x) i, p. 427 . . 1758. 



Acrydium GEOFF. Hist. Ins. i, p. 390 . . 17<i 



Acridiiim SCHRANK Fauna Boica, ii, p. 30 . . 1801. 



Tetrix LATR. Hist. Nat. Crust. Ins. xii. p. 161 . 1804. 



Tettix CHARP. Germ. Zeitschr. Ent. iii, p. 315 . 1841. 



Amongst the smallest of the Orthoptera. Vertex, 

 viewed from the side, more or less distinctly produced 

 in advance of the eyes. Antennae short, stout or 

 slender, consisting of twelve to fourteen segments. 

 Pronotum large, covering mesonotum, metanotum, and 

 not infrequently reaching beyond the tip of the 

 abdomen and the apex of the hind femora ; lateral 

 lobes two-angled behind. Elytra reduced to two small 

 lobes or scales, situated in the hinder of the two angles 

 of the flap of the pronotum. Wings may be large 



