1881.] PHYTOPHAGOUS COLEOPTERA. 449 



Length 3 lines. 



Hab. Java. 



Var. Elytra bluish black ; a transverse band before the middle, 

 deeply 3-dentate at its anterior margin, flavous. 



Head elongate, scarcely narrowed towards the apex ; space between 

 the eyes obsoletely, transversely, and longitudinally grooved ; eyes 

 rounded, entire ; vertex and entire face impunctate, shining fulvous ; 

 anterior margin of epistome emarginate. Antennae as long as the 

 body, fulvous, first joint club-shaped, second joint very short, moni- 

 liforni, third elongate, subquadrate, greatly dilated and deeply 

 foveolate at its outer surface, fourth to the eleventh gradually 

 lengthened, cylindrical and elongate, apex with a short but distinct 

 twelfth joint. Thorax nearly square-shaped, sides widened towards 

 the middle, but constricted near the base, surface with two small 

 round fovese behind the middle, finely punctured, fulvous. Scutellum 

 black. Elytra distinctly transversely depressed below the base, more 

 deeply punctured than the thorax, with indistinct traces of longi- 

 tudinal costse, metallic bluish black ; the extreme base, anterior 

 lateral and sutural margins, and a large round apical spot of each 

 elytron fulvous. Below black, anterior half of the elytral epipleurse 

 fulvous ; femora and part of the tarsi flavous, first joint as long as 

 the two following united. 



The variety does not differ in any way except that of colour. 



Genus Chthoneis, Baly. 

 20. Chthoneis marginicoi.lis, sp. nov. 



Elongate, shghtly widened behind. Black, sides of the thorax and 

 the femora testaceous ; elytra dark violaceous, extreme lateral 

 margins anteriorly flavous. 



Var, Elytra entirely unicolorous. 



Length 4 lines. 



Hab. Peru. 



Head impunctate, deeply transversely grooved, space immediately 

 above the antennae with two distinct callosities ; clypeus wedge- 

 shaped, its anterior margin straight. Antennae incomplete, joints 

 second and third very small ; the following joints elongate, dilated and 

 compressed, the fourth joint the longest. Thorax nearly three times 

 as broad as long, posterior margin rounded and produced in the 

 middle, lateral margin much widened at the middle, distinctly mar- 

 giuate, anterior angles slightly thickened, rounded and oblique; surface 

 very minutely punctured, 3-foveolate (one at each side and one near 

 the middle of the base), black, the sides broadly flavous. Scutellum 

 large, black, impunctate. Elytra rather convex, closely and distinctly 

 punctured, dark violaceous, extreme lateral margin from the base to 

 behind the middle flavous. Underside and legs black, femora 

 flavous ; claws rather largely appendiculate. 



Two specimens are contained in my collection. 



Although this species is more robust and of larger size than the 

 others belonging to this genus, the general characters agree well 



