1879.] PHYTOPHAGOUS COLEOPTERA. 787 



near the base; surface impunctate, very shining, flavous, the disk 

 near the base deeply but irregularly transversely foveolate. Scutellum 

 flavous. Elytra wider than the thorax, very bright metallic green, 

 closely and rather coarsely rugose-punctate ; tibiae and tarsi black, 

 first joint of latter longer tban the following joints together. Claws 

 appendiculate. 



This species seems to form a connecting link between the genus 

 Scelida of Chapuis and the present one ; it may with equal right 

 be classed amongst the first on account of the unarmed tibiae and 

 other characters ; but as in Scelida the third joint of the antennae is 

 much longer than the second, while here it is as short, I have 

 included it in the present genus, although it differs from the typical 

 species in not having the joints of the antennae dilated. 



Genus Scelida, Chapuis. 



27. Scelida viridis, sp. nov. 



Elongate, parallel. Metallic green, pubescent below ; head, thorax, 

 antennae, and legs flavous ; elytra closely rugose-punctate, metallic 

 green. 



Length 6 lines. 



Hab. Mexico. 



Head elongate, vertex swollen, with a deep fovea in the middle, 

 apex of jaws piceous ; antennae half the length of the body, the 

 second joint short, the fourth slightly longer than the third. Thorax 

 nearly square, its sides, from the middle to the base, nearly parallel ; 

 surface impunctate, with a deep oblique fovea at either side. Scu- 

 tellum flavous. Elytra much wider than the thorax, parallel, closely 

 rugose-punctate. Underside metallic green, the sides of the breast 

 and the posterior margins of the abdominal segments closely covered 

 with long white hairs. Legs entirely flavous. 



Of the two other described species, S. elegans, Chapuis, and S. balyi, 

 Jacoby, the present one will be easily recognized by its green under- 

 side and the entirely flavous antennae and legs. 



Genus Monotia, Le Conte. 



28. Monotia viridis, sp. nov. 



Oblong-ovate, convex. Obscure flavous beneath ; above dark olive- 

 green, opaque, finely punctate and pubescent. 



Length 4 lines. 



Hab. Zapote, Guatemala. 



Head with a longitudinal middle groove, rather deeply and closely 

 punctured, clypeus narrow, transverse ; labrum obscure piceous : 

 antennae about half the length of the body, the basal joint olive- 

 green, the following joints testaceous, the last three piceous or 

 black ; the first and fourth joints are of equal length, the second 

 half the size of the third. Thorax transverse, sides slightly au- 

 gulate before the middle ; surface obsoletely impressed near the 

 anterior and lateral margins, finely and not distinctly punctured. 



