new (jr.nera and species of Tench rionidce, S^-c. 305 



to be distinctly and closely fringed with hairs ou their 

 inner edge, in viridlc.uprea and croesus ; whilst in testa- 

 ceipes and intermedia there is a tuft of curled hairs at the 

 apex of the hind tibire Avithin. In both cases I take the 

 characters mentioned to indicate the $ . 



PsiLONESOGENA, nov. gen. - 



Head (leaving out the "muzzle) subglobular, constricted 

 behind forming a short neck; muzzle very long; anten- 

 nary orbits narrow, prominent, conical; epistoma quad- 

 rate, plane, parallel-sided, squarely truncated in front ; 

 labrum very large, expanding outwardly, lightly emargi- 

 nate in front; mentum as in Nesogena; mandibles fine, 

 strongly incurved and deeply cleft at the apex;* maxillary 

 palpi elongate, slender, the last joint very obliquely trun- 

 cated ; eyes large, approximate above (more so in the $ 

 than in the 2 ), not closer beneath than in Nesogena, 

 bordered within by a groove which is prolonged up to 

 the epistomal suture ; antenna very long, slender, joint 

 1 exposed to the root, swollen ; 2 — 3 obconic ; 2 short ; 

 3 as long again as 2; the rest very long, subequal, be- 

 coming gradually filiform ; prothoi'ax a little transverse, 

 convex, strongly rounded anteriorly, a little constricted 

 posteriorly ; apex truncate and very finely margined ; 

 front angles obtuse and much depressed ; base feebly 

 sinuate and strongly margined, the angles obtuse and 

 depressed; lateral edges fine but sharp and distinct; scu- 

 tellum rather largo, triangular; elytra depressed above, 

 nearly as wide again as the prothorax at the base, elon- 

 gate, subparallel from the shoulders, Avhich are rounded 

 and prominent above; strongly sinuately narrowed and 

 pointed at apex; legs elongate, slender, unarmed; tarsi 

 simple, slender, elongate, pilose beneath, the 1st joint of 

 all (but more especially the middle and hind) long ; meso- 

 sternum of the same form as in Nesogena, but less open 

 and less concave in front ; prosternum rather narrow and 

 convex between the coxa?, and curved round them in the 

 $ , a little produced and narrowly conical behind in the 2 ; 

 epipleural fold expanded at the base, not extending to the 

 apex of the elytra ; intercoxal process narrowly rounded 



* In some species of Neitogena (e. g. intermerlia, Fairm.), the mandibles 

 have a similar form, and show indications of a fissure at the apex. 



