988 MR. M. JACOBY ON PHYTOPHAGOUS COLEOPTERA. [Dec. 3, 



striate, purplish blue, a large triangular sutural patch from the base 

 to the middle reddish copper-coloured. 



Length A\ lines. 



Head and clypeus deeply punctured, with a deep longitudinal 

 groove in the middle, of a greenish semiopaque colour, here and 

 there with a purplish tint ; labrum and jaws nearly black ; first 

 joint of the antenna? very thick and subcylindrical, the second short 

 and globose, the rest cylindrical, equal in length ; the first six joints 

 shining greenish aureous, the rest black, opaque. Thorax sub- 

 quadrate, slightly broader than long, all the angles acute and pro- 

 duced externally, the sides with a distinct tooth behind and another 

 very obsolete one before the middle ; disk irregularly transversely 

 wrinkled, visible only when viewed sideways, and covered with large 

 and small punctures ; of a greenish colour, sometimes with purplish 

 patches. Scutellum elongate, finely punctate. Elytra much wider 

 at the base than the thorax, a little widened posteriorly ; each elytron 

 with eight longitudinal costa?, the intervals subgeminate-punctate- 

 striate ; bluish purple, a large sutural triangular patch, extending 

 from the base to below the middle, of a reddish copper, surrounded 

 by light green colour. Underside and legs dark green, with a 

 purplish hue. 



Hab. Columbia. 



Two specimens in my collection. 



12. Chalcophana semirufa, sp. nov. 



Elongate, subparallel, piceous below. Head, tborax, first six 

 joints of the antennas, and the legs rufous. Elytra deeply and closely 

 punctate-striate and partly costate, shining bronze -colour, extreme 

 margin and the apex rufous. 



Length 3| lines. 



Head deeply punctured, with a median groove, labrum yellowish, 

 apex of mandibles black ; antennae with the first six joints rufous, 

 the rest black. Thorax transverse, the posterior margin round and 

 widened in the middle, the anterior one straight, all the angles pro- 

 duced into a short acute tooth, the surface rather coarsely punctate 

 towards the sides, less so on the disk. Scutellum rufous. Elytra 

 with a more or less distinct oblique depression below the base, closely 

 punctate-striate, the punctures not united in pairs, and regularly 

 placed only towards the suture, the rest confused and irregular ; the 

 apex as well as the sides of each elytron furnished with three or four 

 more or less distinct costse, those at the sides commencing below the 

 humeral callus ; the surface of a bronze or metallic green colour, 

 the extreme lateral margins and the apex rufous. Underside dark 

 piceous, as well as the tarsi. 



Hab. Costa Rica. 



Of the six or seven similarly-coloured described species, the pre- 

 sent one will be easily recognized by the colour of the first six joints 

 of the antenna?, which is constant in all the specimens before 

 me, as well as by the strong punctuation of the thorax and the 

 elytra, 



