94 GLENIDION. 



transversely foveolated in O. rubronotatum ; the surface equate, sub- 

 cylindrical. 



Scutellum almost obsolete, much more minute than in Physimerus, 

 depressed below the plane of the elytra, triangular. 



Elytra broader than the thorax, elongated, subparallel, depressed, 

 glabrous ; in O. rubronotatum punctate. 



Legs : the anterior femora when viewed from the front robust, sub- 

 dilated medially. The tibice elongate, at the base inflected, and gra- 

 dually subdilated ; the apex is obliquely truncate, and armed (beyond 

 the insertion of the tarsus) with a robust incurved spur. The tarsi 

 are elongated, almost attenuate, narrower than the base of the tibia ; 

 the basal joint is long, slightly dilated towards the apex; the second 

 is of the same form, but shorter ; the third is ovate, shorter than the 

 second, not bilobed ; the terminal joint is produced, and gradually 

 thickened towards the apex, where it terminates in a bifid claw, the 

 inner surface of which is armed at the base with a robust spur. 

 Posterior femora incrassated and produced, regularly ovate, reaching 

 nearly to the apex of the elytra. The tibice also are elongate, at the 

 immediate base inflected, and gradually thickened towards the apex ; 

 when viewed obliquely from behind, the posterior surface is longitu- 

 dinally flattened and postmedially hollowed out, gradually increasing 

 in depth of concavity, until at the apex it forms a socket for the 

 reception of the tarsus ; the margination of this elongated channel is 

 subsinuate near the apex and more broadly developed ; towards the 

 insertion of the tarsus it is armed with a series of comb-like spurs, 

 close and porrect ; the extreme apex terminates in a robust and short 

 single spur. The tarsus is unfortunately, in the only example I have 

 before me, mutilated ; the basal joint is very elongate, and slightly 

 thickened towards the apex. 



Owing to the unfortunate mutilation of the posterior tarsus in the 

 specimen of G. rubronotatum, I am not able to assure myself, by 

 actual inspection, of the presence of the inflation above the terminal 

 claw, and henc'e of the propriety of introducing it into this section of 

 Halticidae. I am well satisfied, however, from the previous exami- 

 nation of the example by Mr. Baly when in his possession, that it 

 belongs to this group ; this being the case, its affinities are evidently 

 more with Physimerus than with other forms. Its general facies is 

 almost identical, were it not for its produced posterior femora and 

 tibiae. The necessity of separating it, however, from this genus is 

 abundantly manifest ; the striking peculiarity of the third abbreviated 

 joint of the antenna?, combined with the elongated postical femora 

 and elongated and grooved postical tarsi, is sufficient to constitute it 

 the basis of a separate genus. 



