42 PEOCEEDINGS OF THE NATIONAL MUSEUM vol.82 



Elj^tra as wide as pronotum at base, widest at basal fourth; 

 humeral angles broadly rounded; sides nearly parallel or vaguely 

 rounded from base to near middle, then strongly, arcuately nar- 

 rowed to the tips, which are conjointly broadly rounded, the lateral 

 margin vaguely serrate, and when viewed from the side nearly 

 straight from base to apex, except for a broad, arcuate sinuation for 

 the reception of the posterior leg; each elytron with a broad, deep 

 depression along the lateral margin behind the humerus, and with a 

 broad, vague, basal depression ; surface more or less rugose, coarsely, 

 rather densely, irregularly punctate, the punctures becoming obso- 

 lete toward the apices. 



Abdomen beneath feebly convex, vaguely granulose; last segment 

 transversely concave, the apical margin deeply, broadly, arcuately 

 emarginate at the middle, with three or four short teeth arranged in 

 a semicircle on each side of the emargination. Metasternum very 

 broadly emarginate in front. Prosternum feebly, broadly, arcuately 

 emarginate in front ; prosternal process very broad, broadly rounded 

 at apex. Prothoracic epipleura broad and nearly flat. Antennal 

 groove deep, parallel with the lateral margin. 



Length, 2.75 mm; width, 1.5 mm. 



Tyj)e locality, — San Jose, Costa Rica. 



ry^e.— U.S.N.M. No. 49575. 



Remarks. — Described from a unique female collected at the type 

 locality at an altitude of 1,160 meters by M. Valerio. 



This species is closely allied to injidelis Obenberger, but it differs 

 from that species in being glabrous, in having the elytra blue and 

 distinctly punctured, and in the different arrangement of the teeth 

 on the apical margin of the last abdominal segment. 



LIUS HINTONI, new species 



Male. — Elongate, broadly cuneiform, moderately convex, strongly 

 shining ; head and pronotum cupreous, the former slightly aeneous in 

 front ; elytra purplish, with a slight bluish-black reflection in certain 

 lights ; beneath brown, with a distinct aeneous tinge. 



Head with the front as wide as the transverse diameter of the eye, 

 slightly wider at top than at bottom, lateral margins feebly con- 

 verging from top to bottom, deeply, longitudinally depressed, the 

 depression extending to the lateral margins, but becoming obsolete 

 on the occiput, and with a narrow, longitudinal groove extending 

 from epistoma to vertex ; surface glabrous, densely, finely reticulate, 

 sparsely, rather coarsely, irregularly punctate; eyes moderately con- 

 vex; frontal pores large, median, and contiguous; epistoma very 

 narrow between the antennal cavities, strongly, angularly elevated, 

 the antennae nearly contiguous. 



