Mr. J. S. Baly on the Pliytophaga. 459 



culatis ; ti'btis posticis dorso eanaliculatls, apico spina brovi avmatis ; 

 tarsorum ejusdoni pans ai'ticulo basali tibiae apici inserto. 

 T\-pe Camoena tibialis, Baly. 



Canioena tibialis. (Plate XXI. fig. 7.) 



C. oblongo-ovata, modice convexa, fiilya, nitida ; tibiis, tarsia antemiis- 

 que (his apice albis) nigris; elytris iiigris, metallico-micantibus. — 

 Long. 3^ lin. 



Hab. Brazil. 



Oblong-ovate, moderately convex, fulvous, nitidous ; tibitie, tarsi, and 

 antenna? black, three apical joints of the latter white. Head short, 

 trigonate ; eyes oblong, black ; antennse subfusiform, nearly as long as 

 the body, basal joint pale fulvous beneath. Thorax more than tvdce 

 as broad as long ; sides narrowly margined, nearly straight, naiTowed 

 from base to apex ; anterior angles slightly produced, obtuse, incrassate ; 

 disk swollen, transverseh' grooved on side just within the lateral border. 

 Elj'tra o\ate, broader than the thorax, finely punctured. 



Genus Medoma. (Details, Plate XXI. fig. 6.) 



Corims ovatum, modice convexum. Caput exsertum ; facie fere pei"pen- 

 diculari, subtrigona, oculis sat magnis, prominulis, ovatis, integiis ; 

 antennis filiformibus, gracilibus, articulis primo incrassato, secundo 

 brevi, tertio illo plus duplo longiore. Elytra breviter ovata, anguste 

 marginata, tenuiter pvmctata (sulco utrinque ante latus ad basin 

 recurvato). Thorax transversus, basi transversim sulcata. Pedes : 

 femoribus posticis incrassatis ; tibiis posticis apice dente brevi armatis ; 

 tarsorum ejimJem paris articulo basali ad apicem tibife inserto. 



Type, Medoma Batesii, Baly. 



Medonia Batesii. (Plate XXI. fig. 6.) 



M. oblongo-ovata, modice convexa, flavo-fulva, nitida ; vertice, thorace, 

 femoribus posticis (horum basi margiueqne iuferiore exceptis) elytro- 

 rumque dimidio postico nigris. — Long. 3|^ lin. 



Hub. Ega, Upper Amazons. 



Oblong-ovate, moderately convex, nitidous. Head nearly impimc- 

 tate, labrmn piceous ; antennse nearly as long as the body, third joint 

 twice as long as the second ; epistome thickened. Thorax nearly three 

 times as broad as long ; sides oblique, naiTowly margined ; anterior 

 angles obliquely truncate, incrassate ; disk convex, impmictate, im- 

 pressed just before the basal margin with a deep transverse groove, 

 which curves abruptly backwards to the base of the thorax, at either 

 end, a short distance within the lateral border. Elytra subovate, nar- 

 rowly margined, very minutely punctured. 



VOL. I. 2 L 



