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Show 1892] PHYTOPHAGOUS COLEOPTERA FROM MADAGASCAR. 577 short, transversely depressed above and impunctate. Elytra narrowly margined with flavous, much more distantly punctured than A. pulchella, Duv., and the interstices much less strongly rugose, finely wrinkled transversely, and without traces of longitudinal costee. The thorax also is entirely flavous like the head. ^ELIANUS, n. gen. (Galerucince.) Body elongate ; antennae rather robust, the second and third joints short, the following gradually elongate; thorax transverse, the anterior angles more or less produced ; elytra irregularly punctured, their epipleurae narrow but continued below the middle ; tibiae mucronate, the first joint of the posterior tarsi nearly as long as the following joints together ; claws appendiculate ; the anterior coxal cavities open ; prosternum not distinct. This genus approaches closely Malacosoma in general shape and structural characters, but differs in the longer first joint of the posterior tarsi and in the scarcely visible and not convex prosternum. The female insect differs rather considerably from the male, the antennae are shorter, the apical joints being much less elongate, and the anterior angles of the thorax are thickened and produced. .ZELIANUS SCUTELLATUS, n. sp. (Plate XXXIX. fig. 9.) Obscure piceous ; the head, antennae, the scutellum, and the tarsi black; above testaceous, thorax impunctate, spotted with black or without spots; elytra very minutely punctured; legs obscure fulvous, stained with piceous. Length 2| lines. 3. Head shining, impunctate, black, the frontal elevations strongly raised, the clypeus with a distinct central ridge, obscure fulvous ; palpi slender, piceous ; antennae extending to half the length of the elytra, black, the third joint slightly longer than the second, the following five joints equal, the others more elongate, the terminal joint half the length of the preceding one ; thorax twice as broad as long, the sides nearly straight as well as the anterior margin, the posterior margin obliquely rounded at the sides; the anterior angles slightly thickened, the extreme lateral margin black ; the disc flavous or testaceous, impunctate, with four piceous spots placed transversely, the outer ones being the largest ; scutellum large, black, shinino-; elytra testaceous, the extreme sutural margin narrowly piceous, the disc finely and closely punctured, rather opaque; underside and legs obscure fulvous or piceous, finely pubescent, the tarsi black ; the last abdominal segment deeply excavate, incised at the sides. 2 . The antennae shorter, all the joints (the second one excepted) of nearly equal length, rather thickened ; thorax with the anterior angles strongly thickened and produced outwards, the last abdominal segment simple. MIMASTROIDES, n. gen. (Galerucince.) Body elongate ; antennae filiform, the second joint short, the |
