( 259 ) XI. Notes on the Genus Scliematiza (Phytophaga, Galle-rucidae), with Descriptions of New Species. By the Rev. Hamlet Clark, M.A., F.L.S., V.-P. Ent. Soc. [Read September 5th, 1864.] The South American genus Scliematiza contains within it species that vary considerably among each other in form and sculpture. Some (and these the most striking in size and beauty) have deeply costate elytra ; others have their elytra perfectly plain : some are broadly dilated towards their apex ; others have the sides of their elytra parallel. The species are for the most part coloured with irregular flavous bands, and may be at once separated from other Galleruc'tda; by their sufficiently short and broadly dilated antennae : this dilatation is not irregular or con-fined to one or two articulations, but gradually progressive from the first and also from the apical joints towards the middle. In form the species are more or less elongate and depressed ; not subcylindrical, as in Ad'imon'm and Galleruca. The following diagnosis will suffice to point out the limits of the genus. SCHEMATIZA (Chev.) Corporis forma vel oblongo-ovalis (versus apicem plus minus dilatata), vel parallela; depressa, pube tenuissima satis vestita. Palpi maxillares articulo ultimo dilatato, et ad apicem acu-minato, plerumque ut in genere Adimonia. Antennce robust^; in quibusdam speciebus versus apicem subproductaa, sed semper ad medium dilatatse ; hac dilatatione ab articulo basali etiamque ab 11™" vel 10"° sensim et paulatim aucta ; articuli compressi aliquando, et aliquando subcyhndrici ; art. 3*'"* longitudine primum (ad apicem dilatatum) superat. Caput penitus verticale, vix porrectum. Thorax transversus, depressus, plerumque marginibus subelevatis, ita ut discus totus excavatus videtur. Elytra plerumque costata (costis latis etiamque profundis, sed baud apicem attingentibus), aliquando autem plana et sublaevigata. Pedes robusti, unguiculi vel appcndiculati (ut in S. Lycoides) vel undique bifidi, ita ut quadri-unguiculatae species apparent (ut in S, Hispiformi, et presertim in S.Jlavofasciatd).