362 Trans. Acad. Sci. of St. Louis. 



quadrate, t>ehiud the antennae somewhat wider than long, the sides 

 parallel and nearly straight, the angles right, narrowly rounded; 

 base transversely truncate; neck not quite half as wide as the head; 

 antennae separated at base by fully two -fifths of the maximum width, 

 rather slender, only slightly longer than the head, the basal joint scarcely 

 longer than the next two combined, the second barely as long but 

 rather thicker than the third, the latter more strongly narrowed at base 

 and much shorter than the next two combined; cpistoma very short, 

 truncate; labrum transverse, bilobed, the lobes evenly rounded, the 

 notch evenly and deeply sinuate; mandibles small, not grooved exter- 

 nally but with an acute subinferior external edge; maxillary palpi mod* 

 erate, glabrous, sparsely setose, the third joint somewhat notably 

 elongate, the fourth very small, aciculate and extremely oblique; men- 

 tum i>mall, transverse; gular sutures very flue, straight and rapidly con- 

 verging posteriorly to apical third, thence single to the base; flanks of 

 the head evenly and strongly convex, unmodified; eyes well developed; 

 punctures rather strongly impressed and distinct, somewhat sparse 

 throughout, with a narrow irapunctate dorsal line which seems to bi- 

 furcate anteriorly; frontal grooves wanting. Prothorax short, obtrap- 

 ezoiaal, scarcely as long as wide, obviously shorter and narrower than 

 the head, the sides feebly arcuate, the angles obtuse but rather dis- 

 tinct; surface rather finely but deeply, closely and confusedly punctate, 

 with a wide impunctate median line, which is well defined by close-set 

 series and notably narrower toward base; side margin finely acute, 

 extending to the apex though gradually deflexed anteriorly before the 

 middle; below this a second fine carinal line, nearly parallel to and 

 more abbreviated than the lower edge ; prosternum well developed before 

 the coxae, the latter somewhat narrower than usual, the posterior acute 

 angulation approaching the mesosternum much closer than in any other 

 genus, the emargination of the mesosternum very small, rounded, the 

 anterior coxal cavities partially closed externally and posteriorly by a 

 corneous piece not visible elsewhere in the tribe. Elytra longer than 

 wide, one-half longer and nearly a third wider than the prothorax, 

 minutely but deeply, very closely, evenly but irregularly punctured 

 throughout, rather dull; suture very fine, simple. Abdomen {-lender, 

 parallel, distinctly narrower than the elytra and similarly, though still 

 more finely and less closely punctulate, more shining. Middle coxae 

 more rounded and less elongate than usual, contiguous, extending to 

 the sides of the body, flat interiorly, with a large discal concavity in 

 each. Legs short, the tarsi very short, stout and extremely compact, 

 tapering from base to apex, the anterior not dilated. Male not known, 

 the sixth ventral of the female evenly and subparabolically rounded 

 from the sides near the base around the apex. Length 4.0 mm.; width 

 0.55 mm. Cuba (Havana), — C. F. Baker. 



HyptioDia {n. gen.) cabensis n. sp. 



There can be but little doubt that this very singular Xan- 

 tholinid lives under bark, though I have no notes as to its 

 habits from Mr. Baker. Its structural characters, and par- 



