1892.] PHYTOPHAGOUS COLEOPTERA. PROM MADAGASCAR. 569 



lower end and not extending to tlie apex, the lateral margins broadly- 

 metallic green as far as the middle of the elytra, the femora with a 

 very minute tooth, slightly stained with piceous ; everything else as 

 in P. ceneicollis. 



IvoNGius NiGROMAcuLATus, n. sp. (Plate XXXIX. fig. 5.) 



Testaceous, the head and thorax impunctate ; elytra finely punctate- 

 striate, nearly impunctate near the apex, the extreme lateral margin 

 and a small spot below the middle black ; femora unarmed. 



Length 1 line. 



Of convex and subcylindrical shape, the head impunctate, without 

 any grooves or depressions, the clypeus not separated from the face, 

 its anterior edge concave, the eyes surrounded by a narrow sulcus ; 

 the antennsD quite extending to half the length of the elytra, flavous, 

 the basal two joints thick and short, of equal length, the third and 

 following joints more slender, the terminal ones distinctly incrassate; 

 thorax nearly twice as broad as long, subcylindrical, the sides very 

 strongly deflexed, straight ; the anterior margin straight, the 

 posterior one rounded and widened at the middle, the surface im- 

 punctate ; elytra slightly widened posteriorly, strongly convex, with 

 a very slight depression below the base, the shoulders prominent, 

 the surface finely punctate-striate, the punctures nearly obsolete 

 near the apex, the extreme lateral margin and a small spot placed 

 near the latter below the middle black ; underside and legs flavous, 

 the last tarsal joint and the claws stained with black ; femora 

 unarmed, claws bifid ; prosternum widened posteriorly. 



This species resembles much in shape those of the genus Paria 

 and also of Syagrus ; on account of the unarmed femora and bifid 

 claws, however, I have placed it in Ivongius ; in some specim.ens 

 the lateral elytral margin is of the flavous or testaceous ground- 

 colour. 



RhEMBASTUS DIMIDIATICORNIS, n. Sp. 



Fulvous, the sixth and seventh joints of the antennge black, thorax 

 distinctly punctured on the disc ; elytra violaceous blue, distinctly 

 punctate-striate, the apex fulvous. 



Var. a. Elytra flavous, the base, suture, and an oblique band at the 

 middle obscure fuscous. 



Var. b. Elytra entirely fulvous. 



Length I5 line. 



Of convex, subcylindrical shape ; the head nearly impunctate, 

 fulvous ; the clypeus not separated from the face ; eyes emarginate, 

 widely separated, sulcate above their inner margin ; antennae 

 scarcely extending to half the length of the elytra, fulvous, the 

 sixth and seventh joints black, the terminal ones distinctly 

 thickened, the first and second joints short, almost equal, the 

 second and third joints thinner, equal ; thorax about one half 

 broader than long, narrowed in front, the sides nearly straight, 

 the surface finely and sparingly punctured on the disc only, fulvous ; 

 scutellum fulvous ; elytra broader at the base than the thorax, 



