18 MANDIBULATA. ORTHOPTERA. 



Sp. 3. griseus. Obscurus, thorace tricarinato, carina medid antice abbreviatd, 

 elytris abdomine longioribus, griseo subpellucidis, lineis fuscis albo strigatis- 

 (Long. Corp. S 11 — 14 lin.; ? ovip. incl. 14 — 16 lin.) 



Lo. grisea. Fabricius. — Soiuerby B. M. i. pi. 64 — Ac. grisea. Steph. Catal. 

 300. No. 3310. 



Obscure fuscous; head glossy, smooth, somewhat testaceous: eyes linear; 

 thorax above flat, with three ridges, the central one abbreviated in front, 

 and terminating in a furcate groove with a black base, the deflexed lateral 

 lobe is spotted with black, and distinctly edged with pale ; elytra longer 

 than the abdomen, of a pellucid griseous tint, each with three longitudinal 

 fuscescent streaks, faintly interrupted with transverse white ones ; the 

 left elytron in the male with an opaque space, the right with a corresponding 

 very pellucid one ; legs greenish-brown; posterior femora with a blackish 

 longitudinal streak in the middle ; tibite testaceous. 



A very local species, and apparently confined to chalky maritime 

 districts; found, not uncommonly, beneath the cliffs at Dover, 

 towards the end of July, and also in the Isle of Wight, and I believe 

 near Southampton. " Dawlish, Devon, August 1829." — C C. Ba- 

 bington, Esq. 



Family II.— LOCUSTID.^, Leach. 



Tarsi three-jointed; autennce short, filiform, sometimes thickened, or capitate, 

 at the apex ; head perpendicular, forehead descending, generally with a 

 ridge extending backwards; eyes ovate, not prominent; thorax oblong- 

 subquadrate, sometimes a little narrowed anteriorly, at others produced 

 behind and concealing the wings, its sides equally deflexed ; luings simply 

 folded, not subulated at the apex ; elytra vertical, sometimes minute, but 

 mostly as long aa the abdomen, this last more or less subcylindric, with 

 occasionally a ridge down the back, the apex with four styles ; legs \m- 

 equal; anterior short and generally slender; posterior elongated, with their 

 femora ample, and formed for leaping. 



The Locustid^e, at least the major portion of the indigenous 

 species, are smaller than the Gryllidse, and from them they differ in 

 having the antennas shorter, usually filiform, but occasionally elavate 

 or hooked at the extremity ; the elytra are generally longer than the 

 body, though in the less typical genera they become abbreviated or 

 distorted, and the thorax is frequently much produced behind : the 

 majority of the species frequent meadows, &c.: the females have not 

 an exserted ovipositor. 



The indigenous genera may be thus briefly known : — 



