246 MR. F. P. PASCOE ON THE COLEOPTERA OF PENANG. [Ma)' 8, 



Insinuate at the base. Elytra slightly depressed, the sides narrow- 

 ing posteriorly, the shoulders lobed above. Legs elongate, espe- 

 cially the anterior pair in the males ; protibiae curved ; tarsi equal 

 in length, the anterior dilated in the males. Prosternum slightly 

 elevated. Mesosternum produced. 



This handsome genus is allied on the one hand to Otarionoinus in 

 respect of its lobed shoulders, a character which it shares also with 

 Achthophora, and on the other to Triammatus, with which it other- 

 wise agrees, except in a modification of the remarkable antennae, 

 especially in the female, and in the divergent, although still ap- 

 proximate, antennary tubers, which are not cornuted or produced as 

 in Triammatus. The protibiae, too, are curved throughout, and the 

 preapical tooth is nearly obsolete. 



Omocyritjs fulvisparsus. (PL XXVII. fig. 3.) 



O. rufo-fuscus ; capite prothoraceque fulvo bilineatis ; elytris 

 fulvo maculatis ; tarsis nitidis, luteis. 



Reddish brown, slightly nitid, nearly glabrous, but Taried with 

 lines and spots of fulvous pubescence ; head brownish opake in front, 

 with a raised median line, two narrow stripes on the vertex, another 

 longitudinal one before the eye, and a third extending beneath it 

 horizontally ; mandibles dark brown ; palpi luteous ; prothorax 

 finely corrugated, the corrugations becoming gradually granular at 

 the sides, the disk with two narrow fulvous stripes, below on each 

 side a broader, nearly white, stripe, which passes also along the 

 sterna ; scutellum triangular, obtuse ; elytra coarsely and irregularly 

 punctured, with three slightly raised lines on each, the shoulders 

 above produced into a prominent ear-shaped lobe, the disk with 

 numerous small and a few large well-defined spots of fulvous ; body 

 beneath reddish brown, nitid, each abdominal segment, at the side, 

 with a pale fulvous spot ; legs dark brown, with a fine ashy pubes- 

 cence, the tibiae becoming more and more luteous towards the extre- 

 mities, the tarsi bright luteous, shining ; antennae more or less dark 

 reddish brown, the fourth and succeeding joints pale flesh-coloured 

 at the base. Length 12 lines. 



ACHTHOPHORA. 



Achthophora, Newman, The Entom. p. 292. 



Stegenus, Pascoe, Trans. Ent. Soc. ser. 2. iv. p. 104, pi. 22. f. G. 



Achthophora dactylon. 



Stegenus dactylon, Pascoe, I. c. 



The differences between Stegenus and Achthophora are, I think 

 on a re-examination, too slight to justify their being treated as dis- 

 tinct genera. Mr. Wallace, who first discovered this species at 

 Sarawak, found only a few specimens ; at Penaug, however, it seems 

 to be abundant. 



Trachystola. 



Trachystola, Pascoe, Jouru. of Entom. i. p. 350. 





