272 The late Mr. F. Bates's Revision 



angulated in the middle. The sculpture is eveiywhere 

 stronger and closer, especially upon the pygidium, which is 

 also more thickly hairy. The legs are less stout, a differ- 

 ence which is particularly noticeable in the hind femora. 

 Whether this is merely the accompaniment of a reduction 

 in size further specimens must be left to determine. G. J. A.] 



Plusiotis ctipreomarginata, n. sp. 



Size, form, colour, etc. of P. resplendens, Bouc, witli wliich it has 

 hitherto been confounded : it differs in having the mandibles either 

 entire, or feebly sinuate, at the outer edge, and less produced in front : 

 the clypeus convex, broader in front, the margins all strongly reflexed; 

 the head depressed above : the sutural apex of the elytra not acutely 

 produced, the outer margins of the elytra brilliant coppery : the 

 mesosternal process shorter : the under-side of a brilliant silvery- 

 green, sometimes with coppery reflections in the $ : the legs shining 

 coppery, the tarsi tinged with green. Pygidium in the r? almost 

 smooth, compressed at the sides, setose at sides and apex, rapidly 

 declivous and rounded behind : in the $ it is aciculate-rugose at 

 the sides,* gradually declivous, the apex more narrowly rounded : 

 the last abdominal segment smooth in both sexes. 



Long. (J. 21mm.; $. 2.3 mm. Lat. ^. 10'5 mm. ; 9- 12 mm. 



Sal). Costa Kica (Carilla). 



Chrysina Bcckeri, H, W. Bates, cannot pos^bly remain 

 in the genus Chrysina, seeing that the hind legs in the $ 

 differ in nowise from those of the $ except in being a 

 trifle stouter, with their tibise emarginate at the basal 

 edge, and that the metasternum is not at all bulged in 

 this sex. It should, in my opinion, be closely associated 

 with Plusiotis lanivcntris, Sturm., and P, Woodi, Horn. 



Epichalco]plethis, n. gen. 



[This new genus was designed by Mr. Bates for Pelidnota 

 veluti'pes, Arrow, a species forming a connecting link 

 between Pdidnota and Ghalcojjlethis. From both of these 

 genera it differs chiefly by the form of the hind legs of 

 the male, of which the tibiae are broad and compressed, 

 with their upper margins not notched or indented, as in 

 Pelidnota, or irregularly produced, as in Chalcoiildhis, but 



* Subject to individual variation iu both species. 



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