168 THE ENTOMOLOGIST. 



Avhen the carina becomes evanescent ; the carina then runs to 

 the pygidium, which is trianguhir, with an obtuse apex. Meso- 

 sternal keel rather pointed. Anterior tibiaj with three teeth on 

 exterior margin, and with the apical spine obtusely pointed in 

 the males. Anterior femora with a small tubercle in the apical 

 third. Intermediate and posterior tibiae as in Paragijmnopleurusy 

 but rather shorter ; tarsi laterally compressed. 



Type of the genus, G. geojroa, Fuessl. 



The following may be referred to the genus Gymnoplcunis as 

 restricted: — Jicujcllatus, Fab.; stanni, Macleay; aciculatus, 

 Gebler; lacunosus, Klug. ; fulgidas, Oliv. ; olivieri, Cast.; 

 ignitus, lihig. ; h i colo r, hutv. ; cumisccDis, y^ied.; c oelat as, YJied.; 

 ka'iiigi, Fab ; &c. 



Spinigymnopleurus, n. g. 



Much the same as Ggmnoplcuras, but differs in having the 

 anterior tibiiB shorter, and the teeth on the exterior margins 

 wider apart. Frontal carinas scarcely visible to base. The 

 posterior angles of the thorax are terminated by small tubercles. 

 The lateral carinse of the first segment of the abdomen runs 

 from near the humeral curve towards the centre of the elytra 

 and meets the upper carina, which runs round the margins of 

 the elytra. The extreme posterior portion of the first segment 

 of the abdomen is simply carinate, whilst the anterior portion is 

 bicarinate. The second segment is rounded at the sides, with 

 the carinae reflexed close under the lateral margin of the elytra. 

 The lateral margins of the elytra are similar to Gymnopleurus, 

 except that they have a sharp spine at the curve opposite the 

 humeral prominences, just as the sinuation begins. This s^jine 

 is slightly pointing outwards, and is situated on the extreme 

 margin. 



Type of the genus, tristis, Cast. 



The following may be referred to this genus : — plicatus, 

 Fairm. 



NEW SPECIES OF SOUTH AMERICAN EUM0LPIDJ3. 

 By Martin Jacoby, F.E.S. 



Chalcoplacis gigas, n. sp. 



Metallic violaceons-blue ; tbe basal joints of the auteni:fe fulvous; 

 head distinctly, thorax finely and closely, punctured ; elytra semi- 

 regularly punctate-striate. Length, J , B lines, J , 4^ lines. 



' Of broad, subquadrate-ovate shape, entirely dark blue ; the head 

 rather strongly but not closely punctured, slightly transversely de- 

 pressed between the eyes ; clypeus more strongly punctured, its 

 anterior edge concave ; the autennfe not extending to the middle of 

 the elytra, the basal joint blue above, the following two joints fulvous, 



