592 CORIXIxXA. 



4-jointed; Isfc aud 2nd joints short, cylindrical ; 3rd long-clavate or 

 fusiform ; 4th shorter and narrower than the 3rd, subulate. Eyes 

 large, triangular, remote, the inner margins parallel, the posterior 

 margin reaching the base of the head. Bostrum smooth ; labrum 

 transversely wrinkled. 



Thorax. — Pronoium triangular, broader than long ; sometimes with 

 a slight, short, raised, longitudinal middle line, and always with fine 

 dark and pale transverse lines. Scutellum concealed. Elytra trans- 

 versely convex ; davits and Corium mostly rastrate ;* GJavus at its 

 base with a small, triangular, dull piece (seen only when the elytra 

 are expanded) ; Corium ; the antei"ior margin throughout formed into a 

 dull-coloured, broad, deep, parallel, subvertical, rounded channel, 

 posteriorly narrow and shallow, the basal \ occupied by the Emlo- 

 lium, the inner margin strongly defined for frds of its length ; 

 Memhrane imperceptibly separated from the corium, bent ob- 

 liquely over the abdomen ; with only 1 scarcely visible nerve near 

 aud parallel to the inner margin. Sternum; Prosternum short, 

 laterally bilobed, the lobes narrow or quadrangular ; Mesosternum 

 oblong, trapeziform, anteriorly deeply, angularly excised ; pos- 

 teriorly narrow subtruncate ; scajmlcs trapezoidal ; Metasternum 

 trapeziform, produced into a triangular xyphus ; pleurcB trape- 

 zoidal ; para^iJeurce free, oblong, attached to the pleurae. Legs ; 

 1st pair shortest, stout ; coxce oblong, rather shorter than the 

 thighs; tliighs short, stout, sub cylindrical, compressed; tibice very 

 short, subclavate ; tarsi monomerous, scoop-formed, cultrate seen 

 sideways {Palce, Fieb.), characteristically modified in the ^ of the 

 different species, longer and broader than the tibiae and articulated 

 thereto, each edge with long cilia : — 2nd pair longest and thinnest, 

 finely ciliated ; coxce subglobose ; thiglis simple, very long, slender, 

 subcylindrical or flattened; tihice not -J- the length of the thighs, 

 small, cylindrical ; tarsi monomerous,t rather shorter and thinner 

 than the tibiae; claws 2, very long and thin:' — 3rd pair long; coxce 

 horizontal, large, ovate, depressed, Avith a flange on the inner side, 

 deeply notched at the apex where the thighs are joined; thighs 

 broad, dilated, with a few hairs on the apical end of the inner edge ; 

 tibice broad, flattened, with strong spinose hairs on each side and 

 longer fine hairs on the inner side ; tarsi longer than the tibia^ fiat, 



* With fine, short, impressed, longitudinal striie, lilie the marks of a rake 

 on sand. {Fleb.') 

 f rieher {Europ. Ucm.) says 2-joiiited. 



