460 On Coleoptera from Aden and Somaliland. 



closely punctured, black above, with the clypeus, labrum, and 

 underside testaceous. Prothorax very minutely and closely 

 punctured. Elytra closely and more strongly punctured, and 

 having the glossy derm only partially concealed by the short 

 grey pubescence. Legs and first five or six joints of the 

 antennae yellowish testaceous, the remaining joints more or 

 less infuscate. 



The affinities of this new genus seem to be greatest with 

 Psathyrocerusj Blanch., which consists entirely of South- 

 American species. Psathyrocerus has hitherto been placed 

 in the subfamily Criocerinse, though it differs but little in 

 structural characters from Hahrophora^ Erichs., a genus of 

 Eumolpinai placed in the group Leprotites. 



Diacantha (?) duhia^ sp. n. 



cf . Testacea, elytris pectoreque nigris ; pronoto antics ad latera 

 parce punctato, disco leviter transversim impresso, medio basis 

 retrorsum acute sed pauUatim producto ; elytris parce minuteque 

 punctatis, utrisque ad basin prope suturam foveola impressis ; 

 unguiculis tarsorum appendiculatis. 



Long. 5 mm. 



Hab. Lahej [Yerhury). 



Reddish testaceous, with the exception of the elytra and 

 hind breast, which are black. Prothorax shining, minutely 

 and sparsely punctured towards the sides in front, impunc- 

 tate on the middle of the disk, which bears a feeble trans- 

 verse impression ; produced at the middle of the base into a 

 small pointed process, which covers over the scutellum. 

 Elytra black and glossy, feebly and sparsely punctured, and 

 each furnished with a small rounded pit placed close to the 

 scutellum. 



The backward process of the pronotum and the basal pits 

 of the elytra are evidently characters peculiar to the male sex 

 and similar to those met with in many species of Diacantha. 

 The claws of the tarsi are appendiculate, and the species has 

 therefore some relation to the genus Hyperacantha. 



Diorhahda octocostata, sp. n. 



Sordide flava ; capita pronotoque sat valde punctatis ; elytris utris- 

 que quadricostatis, costa tertia ab sutura brevi, costa lateral! 

 acuta ; elytris inter costas minute crebreque punctatis et sub- 

 infuscatis ; antennis fuscis, articulis tribus vel quatuor basalibus 



' flavescentibus ; tarsis infuscatis. 



Long. 5-7 mm. 



i 



