592 CORIXINA. 



4-jointed; 1st and 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. Rostrum smooth ; labrum 

 transversely wrinkled. 



Thorax. Pronotum 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 ; Clavus and Corium mostly rastrate ;* Clavus at its 

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

 are expanded) ; Corium ; the anterior margin throughout formed into a 

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

 posteriorly narrow and shallow, the basal -J- occupied by the Einbo- 

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

 Membrane imperceptibly separated from the corium, bent ob- 

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

 and 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 ; scapula trapezoidal ; Metasternum 

 trapeziform, produced into a triangular xyphus ; pleura trape- 

 zoidal ; parapleurcs free, oblong, attached to the pleurae. Legs ; 

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

 thighs ; ihiglis short, stout, subcylindrical, compressed ; tibia very 

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

 sideways (Pales, 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 ; coxae subglobose ; ihiglis simple, very long, slender, 

 subcylindrical or flattened; tibice not \ 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; coxae 

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

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

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

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

 longer fine hairs on the inner side ; tarsi longer than the tibiae, flat, 



* With fine, short, impressed, longitudinal striae, like the marks of a rake 

 on sand. (Fieb) 

 f Fieber (Europ. Hem.} says 2-jointed. 



