AMERICAN COMPONENTS OF THE TENTYRIIN^ 425 



sculpture nearl^itas in to)>icntosi(s but with the series broadly and 

 distinctly impressed toward the suture; abdomen feebly rugulose 

 but shining, strongly, not very finely but sparsely punctured 

 medially; femora moderately coarsely, sparsely punctured, the 

 decumbent hairs borne by the punctures whiter, coarser and more 

 conspicuous than usual; met-episterna finely punctured through- 

 out. Length S.4 mm. ; width 3.9 mm. ( 9 )• Florida (Capron). 



obesulus n. sp. 



Body unusually narrow, strongly convex, dark piceo-rufous, the 

 anterior parts more blackish as usual, the legs and antenna) not 

 paler, polished, with the faintest opalescent lustre on the elytra; 

 pubescence whitish, distrilnited as usual, the dense patches on the 

 elytra very small, wanting near the suture; head nearly as in 

 obcsuhis^ distinctly narrower than the interangular space of the 

 prothorax, the latter scarcely two-fifths wider than long, formed 

 as in the preceding species, widest at the middle, the punctures 

 small and sparse, denser near the apex, rather closer but not 

 much larger and nearly simple laterally, with the usual less 

 punctate regions near lateral fifth; scutellum small, as long as 

 wide, ogival at tip; elytra three and one-half times as long as the 

 prothorax and, near the middle, about a third wider, gradually 

 acute posteriorly, the sides broadly arcuate, the humeri strongly 

 rounding to the thoracic base and not much exposed basally ; 

 sculpture nearly as in obesulus^ the punctures finer and the series 

 toward the suture evidently impressed ; abdomen smooth, finely, 

 inconspicuously punctate; met-episterna punctured only in inner 

 half ; femora rather finely punctured. Length 7.0 mm. ; w^idth 3.1 

 mm. ((j^ .?). Florida (Cedar Keys) macilentus n. sp. 



The sexual characters in this genus are'very puzzling, judg- 

 ing from certain accidentally exposed portions of the cedeagus. 

 In the male type of fardalis^ for example, there is visible, pro- 

 jecting to the left from the crevice between the elytral tip and 

 last ventral, a long and very slender process, not thicker than 

 a hair, with its apex very briefly curved and falciform and ex- 

 tremely aciculate. On examining the insect from the rear, in 

 the axial line of the body, the hair-like process seems to be the 

 prolongation of a corneous piece, not unlike the ordinary pointed 

 intromittent organ frequently protruded in the Epitragini and 

 Eurymetoponini, except that here, instead of projecting in the 

 axial line and curving upward, it lies transversel}', with the hair- 

 like appendage projecting to the left, as stated, when viewed 

 from above. In the type of cuprascens^ there is a similar hair- 

 like process projecting likewise to the left, but shorter, with its 

 apex strongly and abruptly curved and very acutely pointed or 



Proc. Wash. Acad. Sci., September, 1907. 



