South American EumoIpid[&. 491 



feeble depression below the base, very finely geminate punctate- 

 striate near the suture, more strongly so at the sides, the interstices 

 near the extreme apex longitudinally costate ; legs short and stout, 

 seneous like the underside, the anterior tibite strongly widened at 

 the apex, carinate, the first joint of their tarsi strongly widened, 

 prosteruum narrow and elongate, its base slightly concave ; the 

 anterior margin of the thoracic episternum concave. 



Hob. Colombia (Pehllce), Mus. Stettin and my collection. 



This is another species, for which it is difficult to find 

 the proper place; it does not quite agree either with 

 Colaspis or with Aldhaxius ; but the sliort and robust 

 antennae and the narrow prosternum induced me to place 

 it in the latter genus. The thorax is, however, less 

 transverse and even, and its lateral margin instead of being 

 hi- or tri-sinuate, as in Aldhaxius^ is only angulate; any- 

 how these characters will help in the recognition of the 

 species. Female specimens of other species of Alethaxius 

 are likewise often provided with tubercles or short costoe 

 at the base of the elytra; and in the present species, of 

 which both sexes are before me, the female agrees in this 

 respect with the other members of the genus. 



Alethaxius (?) sericeus, sp. n. 



Below more or less greenish, tlie antennaj and legs flavous, head 

 and thorax dark fulvous with greenish tint, closely punctured and 

 finely pubescent, elytra flavous, tlie lateral margins greenish, 

 strongly rugosely punctured, the interstices longitudinally costate. 



Length 5 millim. 



Of elongate, parallel shape, the head strongly and closely rugose 

 punctate, metallic green, the ground colour dark fulvous, sparingly 

 clothed with short grey pubescence, clypeus broad, not separated 

 from the face, sculptured like the head, its anterior edge deeply 

 triangularly emarginate, labrum and palpi flavous, antennae extending 

 to the middle of the elytra, flavous, the third joint very slightly 

 shorter than the fourth one, the terminal joints moderately widened ; 

 thorax transverse, of equal width, the anterior and posterior margins 

 parallel, the sides bisinuate, with a narrow reflexed metallic green 

 margin, the disc extremely closely punctured and clothed with fine 

 grey pubescence, scutellum sparingly punctured ; elytra not wider 

 at the base than the thorax, strongly punctured in double rows, the 

 interstices transversely rugose, and longitudinally costate, flavous, 

 the interior of the punctnres and the lateral margins and epi].leura3 



