1902.] OF AMERICAN COLEOPTERA. 189 



margins likewise black ; below flavous, the anterior legs entirely, 

 the apex of the femora and the tibiae and tarsi black. 



Hah. Pernambuco, Serra de Communaty. 



This little species resembles somewhat the well-known D. austri- 

 aca Schauf., but the design of the el}i;ra is diflferent and consists 

 of two flavous and two black transverse angulate bands and a 

 flavous spot at the apex : the first of these light bands is placed 

 somewhat obliquely at the base, leaving the humeral callus black, 

 the second is situated at the middle and is sti-ongly constricted 

 medially. 



Oacoscelis guianaensis, sp, n. 



Flavous, the vertex of the head, the antennae, the femora above, 

 and the tibise and tarsi black ; thorax finely punctured, with two 

 black spots ; elytra metallic green, strongly and closely punctured, 

 the lateral margins narrowly flavous ; tibise not emai"ginate. 



Length 10-12 millim. 



Hah. British Guiana. 



I am obliged to separate this species from the well-known 

 G. marginata Fab., which it completely resembles in coloration, on 

 account of the entire tibise, the same parts in C. marginata having 

 a very distinct emargination. Other less striking diflierences^re 

 to be found in the rather stouter antennse of the present species, 

 in the more transversely shaped thorax, which is closely and 

 finely punctured at the sides and has two large well- separated 

 blackish spots, with sometimes a smaller intermediate one. 

 Fabricius's species is generally found in Brazil. In the present 

 insect the vertex of the head is likewise black, which I have 

 not found to be the case in any specimen of the allied species. 

 G. compta Erichs. has the svitural margins flavous as well as the 

 lateral ones. There are four specimens before me. 



Oacoscelis tibialis, sp. n. 



Below flavous, above fulvous, the antennse, tibise, and tarsi 

 black or piceous; thorax transversely subquadrate, impunctate, 

 obsoletely sulcate ; elj^ra finely and closely punctate-striate. 



Length 7-8 millim. 



Of elongate and nearly parallel shape, the head impunctate, 

 fulvovis, the frontal elevations transverse, bounded behind by a 

 deep groove ; clypeus rather strongly raised between the antennse, 

 its anterior margin straight ; labrum flavous, with a few punctures ; 

 terminal joint of the palpi acutely pointed ; antennse extending 

 slightly beyond the middle of the elytra, black, slender, the third 

 and fourth joints more slender than the following ones but not 

 longer, basal joint more or less fulvous below ; thorax about one- 

 half broader than long, of equal width, the sides rounded, the 

 anterior angles somewhat oblique, the lateral margins accompanied 

 by a depression, the base with a shallow transverse groove ; the 

 disc impunctate, fulvous, shining ; scuteUum triangu.lar, im- 

 punctate ; elytra finely punctured in closely approached, rather 



