502 CASEY 



with the truncate apex filled with whitish spongiose sensitive tissue ; 

 side-pieces of the oral cavity prolonged and acutely prominent ; 

 antennae thick, cylindrical, rather long and coarsely sculptured, 

 the outer joints but little wider, the eleventh with a large and 

 obtuse spongiose apical convexity, the second joint short, third 

 and fourth subequal, moderately elongate ; eyes rather small, 

 coarsely faceted, transversely reniform ; prothorax with acute 

 reflexed side margins ; scutellum short but distinct, strongly trans- 

 verse, truncate ; elytra with short costse forming series, the epi- 

 pleurae entire, moderately narrow, occupying the entire inflexed 

 sides ; prosternum long before the coxse, the process slightly pro- 

 longed and obtusely porrect posteriorly, the mesosternum not at all 

 excavated, narrow between the coxae ; metasternum well developed, 

 the episterna parallel, moderately wide, the suture rectilinear ; abdo- 

 men with the segments diminishing slightly in length posteriorly, 

 nearly as in the preceding genus ; legs moderately long and stout, 

 the tibiae not much dilated apically, with the spurs stout and un- 

 equal, the tarsi well developed, stout, with long and dense recum- 

 bent fulvous hairs beneath, the basal joint of the posterior scarcely 

 as long as the last, the claws long, stout and strongly arcuate. 

 [Type A^. cristata Esch.] Nyctoporis 



Body still much larger and much stouter, moderately convex, glabrous, 

 with very thick dense integuments ; generic characters nearly as 

 in JVyctoporis^ except that the eyes are relatively more finely 

 faceted, the third antennal joint very much longer and the outer 

 joints more dilated, the eleventh almost as wide as the tenth, 

 broadly rounded at base, the spougiose apical part strongly angu- 

 late, the glabrous basal part arcuately advancing anteriorly at the 

 sides ; intercoxal process of the prosternum broader, flat, acutely 

 porrect behind, the mesosternum elevated and flattened between 

 the coxas, its anterior wall vertical and excavated for the tip of 

 the prosternal process, recalling Epitragiis ; metasternum ex- 

 tremely short, the episterna moderately wide, narrowing posteri- 

 orly, with the suture arcuate ; abdomen nearly as in the preceding 

 genus, except that the last three segments are relatively smaller ; 

 elytra much more widely embracing the sides of the body, with 

 the epipleurai narrow, more or less feebly defined ; legs long and 

 rather slender, cylindric, the tibial spurs moderate, unequal, the 

 tarsi cylindric, feebly grooved beneath, the joints crowned at apex, 

 and especially at the inferior apices, with short stout fulvous spin- 

 ules ; claws rather small, slender. [Type C. carahoidcs Mann.]. 



Centrioptera 



Body very similar to the last but still stouter and more convex, the 

 generic characters almost similar, except that the last antennal 

 joint is relatively very much smaller than the tenth and of a pecu- 

 liar short, very transverse, obtrapezoidal form, with truncate and 

 sensitive apex, the mesosternal excavation larger and deeper, the 

 elytral epipleuroe more strongly defined and the tarsi even more 



