114 



tubercles small, oblong, labrum flavous, antennae rather long and 

 slout, flavous, the second and third joint very small, the fifth and 

 following joints somewhat triangularly widened; thorax twice as 

 broad as long, the sides straight, the dise transversely sulcate, 

 Impunctate, scutellum purplish ; elytra slighlly wider at the base 

 than the thorax, with a transverse dépression below the base, 

 entirely metallic green, finely rugose-punctate throughoul; below 

 blackish or greenish, legs flavous, tibise unarmed, the metatarsus 

 of the posterior legs as long as the following joints togelher, coxal 

 cavities closed. Excepting the thoracic sulcus and some few other 

 détails, the présent spectes agrées so closely with the type that 

 I cannot separate it generically; like the following species C. viridis 

 has the posterior femora moderately thickened, although not to an 

 extend usually found in the Halticinœ, nor is the prosternum well 

 defined, but there Is no doubt that Chalœnosoma is a transitionary 

 form between the Galerucinœ and Halticinœ. 



CHALŒNOSOMA CUPREA sp. n. 



Oblong-ovatc, widened posteriorly, cupreus, anlennae fulvous, 

 the basai joint blue, thorax transverse, nearly impunctate, elytra 

 with basai dépression, finely punctured, metallic cupreous, a spot 

 at the base, two others, placed transversely at the middle and anolher 

 near the apex, purplish, legs metallic blue, tibiae and tarsi black. 



Length 5 mill. 



Head impunctate, metallic cupreous, frontal élévations narrowly 

 transverse, clypeus triangular, narrow, antennse filiform, scarcely 

 extending to the middle of the elytra, fulvous, the basai joint 

 metalUc blue, the second small, the third but slightly longer; 

 thorax transverse and short, the anterior and latéral margins nearly 

 straight, the angles acute, the surface rather convex, with some 

 very minute punctures, when seen under a strong lens, scutellum 

 purplish; elytra convex and widened posteriorly, with a distinct 

 transverse dépression below the base, very finely punctured, except 

 within the dépression, where the punctures are stronger, metallic 

 cupreous, with a narrow transverse spot or band above the basai 

 dépression, two small spots, placed transversely at the middle and 

 another spot near the apex, purplish, margined with green, below 

 and the legs greenish cupreous or bluish, the metatarsus of the 

 posterior legs as long or rather longer than the following joints 

 together. 



In structural characters, this species agrées entirely with the 

 type C. metallicum Jac. but differs quite In the gênerai coloration 

 and that of the antennse and legs. 



