196 CERICITRESTUS. 



much more prominent than in adjoining groups. The posterior 

 femora (when viewed transversely) are very much incrassated and 

 ovate ; in the males they are distinctly more elongate than in the 

 females. The tibia) are short, inflected at the immediate base, and 

 longitudinally grooved along the posterior surface; this groove is 

 "•radually deepened into a terminal socket for the reception of the 

 base of the tarsus ; the marginatum of the groove is never, I believe, 

 dentate, but generally subsinuate ; the apex is subdilated and ob- 

 liquely truncate, and armed below the insertion of the tarsus with a 

 robust double spur. The tarsus is short ; the first joint is consider- 

 ably dilated at the apex ; the second more filiform ; the third much 

 shorter and subcircular ; from its centre proceeds the ultimate joint, 

 which is apically dilated into a large globular inflation completely 

 concealing from above the terminal claw. 



This genus has a facies peculiarly its own, and unmistakeable. 

 The antennae, which are generally filiform, are more attenuate to- 

 wards the apex than in other genera ; the elytra are parallel and 

 subcylindrical, much more elongate than in the genera Allochroma 

 or Omototus ; the surface is generally clothed throughout with a thick 

 and short pubescence. 



The sexual distinctions in this genus are evident : the males are 

 less robust in form ; they have the antennae considerably longer, the 

 eyes slightly more globose, the posterior femora more elongate (ex- 

 tending nearly to the apex of the elytra), and also the basal joints of 

 the anterior tarsi flatly and broadly dilated. 



1. Cerichrestus Balii. 



C. oblongus, ovalis, parallelus, pubescens, niger ; capite brevi, nigro, 

 ad apicem fulvo, ad basin fulvo maculato ; thorace transverso, 

 subquadrato, antice coarctato, ad basin transverse depresso, nigro- 

 pubeseenti, ad latera Icete aureo marginato ; elytris elongatis, 

 punctato-striatis, ad liumeros fulvo notatis ; antennis robi<stis, 

 incrassatis, nigris, art. 9-11 testaceis ; pedibus fuscis, femoribus 

 (ad basin), tibiis tarsisque posticis testaceis. 



Long. corp. 3^ lin., lat. 1^ lin. 



Oblong, oval, the sides parallel and somewhat attenuated ; pubes- 

 cent, black. Head very short, depressed, slightly produced in front ; 

 eyes distant, situated at the base of the head, and extending laterally 

 not quite so far as the anterior angles of the thorax. Antenna 

 approximate ; labrum and maxillary palpi of a dark bright-fuscous 

 colour ; the lower part of the head (below the insertion of the an- 

 tennas) pale ferrugineous ; above the antenna? granulated and black ; 



