[57] NORTH AMERICAN COLEOPTERA. 213 



There is unfortunately no male of this genus yet discov- 

 ered; the sixth segment of the female is short and broad, 

 very broadly and feebly rounded nearly throughout its width 

 at apex, subtruncate. The species may perhaps prove to 

 be apterous. 



RAMONA n. gen. (PsBderini.) 



This genus belongs to the Lithocharis and Medon divis- 

 ion of the Psederini, and is allied somewhat to Caloderma 

 and to several genera recently described from Central 

 America. It may be distinguished by the following char- 

 acters : — 



Head smaller than the prothorax; the latter quadrate, shorter than the 

 elytra. Labium entire, short, broadly rounded throughout, without inequal- 

 ity except some very minute and feeble undulations, three or four in number 

 near the middle, having dorsally a small median carina; neck rather slender, 

 one-third as wide as the prothorax. Anterior tarsi broadly dilated; posterior 

 slender, cylindrical, first four joints decreasing very rapidly in length, first 

 nearly as long as the next two together, fourth cylindrical, very slightly 

 longer than wide. Head and pronotum without trace of median impunctate 

 line, stria or elevation; integuments extremely finely and densely punctate, 

 alutaceous. Eyes moderate in size, coarsely granulated. 



The third joint of the maxillary palpi is rather more 

 strongly dilated than is usual in this group, the fourth 

 being normal. The elytra differ from those of many allied 

 genera in having no sign whatever of the usual narrow ele- 

 vated margin adjoining the suture. The genus is distin- 

 guished from Medon and Caloderma by many characters, 

 the most important of which is the strong dilatation of the 

 anterior tarsi. 



The sexual modification of the male is very slight, con- 

 sisting of a simple broad sinuation at the apex of the sixth 

 segment, the fifth being entire. 



But one species is known at present. 



It. capitulum u. sp. — Rather slender and depressed, black throughout, 

 apical edges of the ventral segments paler; intermediate and posterior legs 



