504 



RHYSODIDiE. 



b. Interstices of elytra not alternately 

 raised. 



«*. Last joint of the antennae acu- 

 minate at apex. 

 «f. Elytra with rows of punctures, lineatus, Grouv., p. 507. 

 &f- Elytra with punctured striae. 

 a%. Average size larger; head 

 and prothorax shorter; an- 



tenna3 shorter and thicker, mcddbaricus, Arrow, 

 b%. Average size smaller; head [p. 507. 



and prothorax larger ; an- 

 tennae longer and less thick, fece, Grouv., p. 508. 

 £*. Last joint of antennae blunt at 

 apex. 



a], Form narrower ; central fur- 

 row of prothorax not closed 



in front; headlong nicobarensis, Grouv., 



Form broader; central furrow [p. 508. 



of prothorax closed in front. 

 «+. Form shorter, subovate ; 

 head shorter, posterior an- 

 gles marked by an angular 



projection; colour black. . anguliceps, Arrow, 

 h%. Form larger, oblong ; head [p. 509. 



longer, posterior angles not 

 marked by an angular pro- 

 jection ; colour dark cas- [p. 510. 



taneous longiceps, Grouv., 



II. Eyes small, projecting (subgen. Shyrodes, 



Grouv.) dohertyi, Grouv., p. 510. 



275. Rhysodes arrowi, Grouv. 



Rhysodes arrowi, Grouvelle, Ann. Soc. Ent. France, lxxvii, 1908, 

 p. 368. 



Elongate-oval, shining black, glabrous ; head slightly trans- 

 verse, with the posterior lobes not elongate, rounded and approxi- 

 mate at base, emarginate in a semicircle on their inner side, and 

 then continued in straight diverging lines to the lateral margins 

 of the thorax, the space between them being more or less diamond- 

 shaped; antennae with joints 2-10 subtransverse, 3 subcordiform, 

 last joint strongly acuminate ; pronotum elongate, oblong, broader 

 than the head, with three longitudinal furrows, the central one 

 entire, and the lateral ones narrowed or abbreviated in front, but 

 deeply impressed before the base, and joined to the base by a 

 broad oblique furrow ; elytra punctate-striate, with the inter- 

 stices flat, evidently broader than the striae, the second and fifth 

 joined at apex and forming an apical callosity ; shoulders toothed ; 

 legs short. 



Length 8| millim. 



SlKKIM. 



Type in M. Grouvelle's collection. 



