1881.J PHYTOPHAGOUS COLEOPTEhA. 441 



Length 2-21 lines. 



Hab. Maue, Amazons. 



Front of the head swollen, minutely punctured, with a faint lon- 

 gitudinal central groove ; clypeus separated from the face by au 

 obsolete triangular groove, its surface finely rugose-punctate. La- 

 brum metallic green. Antennae extending to the base of the thorax, 

 their five apical joints transverse, distinctly broader than long, black, 

 basal joints more or less fulvous. Thorax transversely convex, 

 much widened at the base, from there to the apex narrowed and 

 much reflexed anteriorly, surface very minutely punctured. Scutel- 

 lum semicircular, broader than long. Elytra scarcely more than twice 

 as long as the thorax, very convex, a little more strongly punctured 

 than the thorax, the punctuation arranged in regular rows, each 

 elytron with a distinctly raised costa near the lateral margin from 

 the middle to the apex. Legs robust, dark metallic blue. 



A variety is of a larger size, and of a metallic green colour above, 

 but does not differ in other respects. 



Collection Jacoby, 



Genus Colasposoma, Castela. 



6. COLASPOSOMA GIBBICOLLE, Sp. HOV. 



Oblong, convex. Dark blue ; head strigose laterally, aureous ; 

 thorax convex, closely and deeply punctured, dark blue; elytra 

 aureous, the suture broadly, extreme lateral margin narrowly, dark 

 blue. 



Length 4-4| lines. 



Hab. Zanzibar. 



Head closely punctured, shallowly depressed in the middle, the 

 sides obhquely strigose. Antennae of half the length of the body, 

 black ; the first joint globular, second short, third joint longer than 

 the fourth, last five joints widened. Thorax about twice as broad 

 as long, very convex, the sides much rounded, anterior angles dis- 

 tinct, posterior margin nearly straight at the sides, rounded at the 

 middle, surface densely and deeply punctured. Scutellum distinctly 

 punctate. Elytra nearly three times as long as the thorax, mo- 

 derately convex, rounded towards the apex ; surface very closely 

 transversely rugose at the sides, punctate-rugose near the suture, 

 extreme apex finely pubescent. Underside and legs dark blue, pu- 

 bescent. 



Of this handsome species I possess six specimens, which do not 

 differ except in size ; besides the well-marked pattern of the elytra, 

 the convexity of the thorax and its rounded lateral margin will 

 easily distinguish this species from others. 



7. CoLASPOSOMA APICALE, Sp. UOV. 



Oblong, ovate, convex, ^neous below, closely pubescent ; labrura 

 and antennae fulvous, above metallic green ; thorax finely, elytra more 

 strongly punctured, the extreme lateral margin and the apex 

 aureous. 



Proc. Zool. Soc— 1881, No. XXIX. 29 



