200 lygtEINA. 



Genvs 11. — Troptsthetus, Fieb. 

 Siib-elliptic, the sidea parallel. 



Head 5-sicled, short, convex ; central lobe prominent. Antennce 

 stout, short, each joint of about the same thickness, and very thin 

 at the base ; 1st joint half its length, reaching beyond the end of 

 the face ; 2nd and 3rd clavate ; 2nd nearly twice as long as the 1st ; 

 8rd ^ths as long as the 2nd ; 4th slightly longer than the 3rd, not so 

 long as the 2nd, fusiform. Eyes small, semiglobose. Ocelli dis- 

 tant. i?c>sifr«??i reaching to the 2ud pair of coxae; 2nd joint longest, 

 4th short. 



Thorax. — Fronotum subtrapezoidal or carapanulate ; anterior 

 margin slightly concave, longer than the width of the head across 

 the eyes ; anterior angles rounded ; sides nearly parallel for the first 

 |-rd*s, then suddenly divergent ; lateral margins very narrow ; pos- 

 terior margin concave ; disk, first frds rather convex ; last Brd 

 flatter, within the hinder angles raised into a strong callus. 

 Scufellum large, triangular, flattened across the base and centre. 

 Elytra ; Clavus deflected to the corium ; claval suture depressed ; 

 Corium convex, anterior margin straight ; Ilemhrane very thin 

 (often abbreviated) ; with 4 scarcely perceptible nerves, the two outer 

 straight, the t'wo inner curved only at the base. Sternum ; Meso- 

 sfernum convex, with a sharp central keel hindwardly depressed, in 

 front strongly arched ; Metasternum rhomboidal, convex, with a 

 sharp, cruciform keel. Legs : tliighs ; 1st pair greatly incrassated ; 

 beneath angulated, and with a shallow channel on the apical half, on 

 the inner side of which is a row of small teeth, and in the (^ also a 

 strong, broad elevation ; tihice ; 1st pair bent, towards the apex 

 widened internally (in the (^ more than in the ? ), and bidentate 

 at the apex ; tarsi ; 1st joint on the 1st and 2nd pairs not longer 

 than the 2nd and Brd, in the Brd pair as long. 



Species 1. — Tropistethus holosericeus. 



Pachymekus sabuleti, Ha/i/i, Wanz. ii, 120, t. GO, fig. 201 (1S34), noii 

 Fall. 

 HOLOSEKiCEUS, SclioUz, Avb. u. Vcrjiud. 19, 2 (1815). 



