278 Mr. J. O. Westwood's Descriptions 



angulos posticos alteraque media ante scutellum posita im- 

 presso. Elytra subrotundata, postice truncata striola sutu- 

 rali, altera approxiraata discoidali postice abbreviata, ter- 

 tiaque brevissima subhumerali. Abdomen elongato-ovale, 

 glaberrimum, convexum, basi ad latera setosa lateribusque 

 marginatis. Pedes graciles, simplices. 



Genus Metopias, Gory. 



This curious genus, first described by M. Gory in Guerin's Ma- 

 gasin de Zoologie for 1832, and represented in Plate 4:2, was 

 founded upon a remarkable species, of which M. Lacordaire in- 

 forms us (Gen. d. Coleopt. 2, p. 169), that he only took two 

 specimens in Cayenne, flying in woods, and which, both in the 

 anterior nose-like projection of the forehead and the elbowed an- 

 tennae presents so great analogy with the Curculionid<v that M. 

 Gory designated the species — 



(Sp. 14) Metopias Curculionoides (Plate XVII. fig. G). 



In consequence of its similarity to Metopius (the name of a 

 genus of Ichneumonidce), M. Laporte proposed to change the 

 generic name to Marnax ; but I quite agree with M. Lacordaire 

 in rejecting such a proposed change, considering that it is a matter 

 of indifference whether a genus or sub-genus, as at present con- 

 stituted, in one order bears a name similar or even identical with 

 that of another in a different order; although of course it is ad- 

 visable to avoid such " doubles emplois." The genus belongs to 

 that section of the family which has the antennae approximated 

 together at the base, forming by itself a distinct subsection from 

 the unequal size of the two ungues in each foot. I have added 

 an outline of this typical species in Plate XVII. fig. 6, in order to 

 show its distinction from the two new species described below, 

 from which it will be at once seen to differ in the cordiform shape 

 of its prothorax. 



We are indebted to the indefatigable exertions of Mr, Bates for 

 these two additions to this remarkable group. 



Sp, 15, Metopias bellicosus, Westw. (Plate XVII, fig. 7.) 

 Elongatus, capitis fronte longiori porrecto, prothorace versus 



angulos anticos, humerisque elytrorum bispinosis ; pedibus 



longissimis, femoribus valde clavatis. 

 Long. Corp. lin. If, 

 Habitat in Brasilia, D. Bates. 



