AMERICAN COMPONENTS OF THE TENTYRIIN^ 377 



At present this genus is confined entirely to islands between 

 North and South America, but it is probable that it will ulti- 

 mately be found also in southern Florida. 



Trientoma Sol. 



The described species are some seven or eight in number ; the 

 following appears to differ from any known to me in the books : — 



Body stout, evenly elliptical, moderately convex, deep black, the legs 

 scarcely picescent, densely opaque, the surface with extremely 

 minute but strong reticulation, smooth ; head wilder than long, 

 the supra-orbital carinas at some distance from the eyes, the sur- 

 face longitudinally, unevenly and closely strigato-plicate, the car- 

 inules converging toward the reentrant arcs between the epistoma 

 and obliquely rounded sides of the front, extremely minutely, 

 sparsely pvmctulate throughout ; antennae not extending to the base 

 of the prothorax, the third joint as long as the next two combined, 

 the surface sparsely clothed with inclined yellow setae ; prothorax 

 about half as long as its basal width, the sides converging and 

 feebly, subevenly arcuate from the rather acute and posteriorly 

 subprominent basal angles to the slightly acute but blvmt and 

 anteriorly prominent apical angles, the apex three-fourths as wide 

 as the base, deeply and evenly sinuate ; base transverse, with a 

 very short broad arcuato-truncate median lobe separated from 

 the general surface by an entire transverse furrow ; disk impunc- 

 tate, extremely minutely and rather sparsely so toward the sides ; 

 scutellum narrow, pointed ; elytra scarcely a third longer than 

 wide, two and one-half times as long as the prothorax, and, before 

 the middle, very little wider, the sides evenly and broadly arcuate, 

 gradually arcuate and converging in apical half to the acutely 

 ogival apex, the punctures small but distinct, rather coarse later- 

 ally, widely spaced in very feebly impressed series which extend 

 to the apex, the interspaces impunctate under a hand lens, the 

 marginal stria deep ; abdomen more shining, sparsely, excessively 

 minutely, the basal segment rather less minutely, punctulate, wholly 

 impunctate toward the sides. Length 7.7 mm. ; width 3.7 mm. 

 Bahama Islands (Egg Island), — H. F. Wickham. 



wickhami n. sp. 



The abdomen at base being perceptibly punctate medially but 

 wholly impunctate laterally, contrasts much with any form of 

 the Eurymetoponini, these all having the lateral punctures much 

 coarser than the medial. This is a very interesting discovery 

 by Mr. Wickham and I take pleasure in dedicating the species 

 to him. 



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



