200 LYG^EINA. 



Genus 11. TROPISTHETUS, Fieb. 

 Sub-elliptic, the sides parallel. 



Head 5-sided, short, convex ; central lobe prominent. Antenna 

 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 ; 

 3rd ^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. Rostrum reaching to the 2nd pair of coxae; 2nd joint longest, 

 4th short. 



Thorax. Pronotnm subtrapezoidal or campanulate ; anterior 

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

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

 f rcte, then suddenly divergent ; lateral margins very narrow ; pos- 

 terior margin concave ; disk, first f rds rather convex ; last 3rd 

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

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

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

 Corium convex, anterior margin straight; Meinbrano very thin 

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

 straight, the two inner curved only at the base. Sternum ; Meso- 

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

 front strongly arched; Metasternum rhomboidal, convex, with a 

 sharp, cruciform keel. Legs : thighs ; 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 ; tibiae ; 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 3rd, in the 3rd pair as long. 



Species 1. TROPISTETHUS HOLOSERICEUS. 



PACHYMEHTJS SABTJLETI, Hahn, Wanz. ii, 120, t. 66, fig. 201 (1834), non 



Fall. 

 HOLOSERICEUS, Scholtz, Arb. u. Verand. 19, 2 (1845). 



