AMERICAN COMPONENTS OF THE TENTYRIIN^ 495 



Body parallel, evenly and moderately convex, feebly sculptured ; head 

 quadrate, parallel, not in the least narrowed at base, the surface 

 evenly convex toward the sides and apex, the antennal tuberosities 

 large and very feeble, the oblique sutures fine and long, the cly- 

 peus convexly declivous anteriorly, with its apex broadly sinuate 

 and its apical edge thinner, translucent and subcoriaceous ; man- 

 dibles small, bifid at tip ; mentum moderate, subquadrate, parallel, 

 wider than long, exposing most of the maxillae at the sides but 

 concealing the narrow ligula, its apex transversely bisinuate ; palpi 

 slender, the last joint of the maxillary narrow, elongate-oval, 

 circularly and minutely truncate at tip, longer than the two pre- 

 ceding combined; eyes extremely minute, on the upper surface 

 near the base and at some distance from the obtuse sides of the 

 head, consisting of a slender oblique slit, closed at the middle by 

 the intrusion of its sides, the anterior part very small, rounded 

 and enclosing a very few extremely minute crystalline facets, the 

 posterior part elongate, lenticular and extremely minute with the 

 facets not distinct ; antennas rather slender, compact, cylindric, as 

 long as the head, ii-jointed, the two basal joints a little thicker, 

 outer joints of the funicle increasing very slightly in width, the 

 last three joints broader, forming a loose and subcompressed club, 

 the last joint very much longer than the preceding but barely as 

 wide and obtusely rounded at tip, the fossae narrow and very deep, 

 rectilinear, approaching the sides of the head behind and continu- 

 ing onto the anterior part of the propleuroe, where they become 

 larger and deep but less sharply defined ; prothorax obtrapezoidal, 

 thickly beaded at the sides, with a short strong carina at each side 

 of the middle at base, near outer fouith ; scutellum triangular, 

 confined to the sloping base of the elytra, the latter each with a 

 thick basal margin externally, arcuately, internally receding from 

 the base, to inner third, where it continues posteriorly as an exces- 

 sively minute raised line not quite to the apex ; there are also three 

 other paitial raised threads on each elytron, the side margins at 

 the epipleurae conspicuously concave and with a series of large 

 impressed foveae ; median part of the elytral base convexly decli- 

 vous anteriorly, the elytra moderately embracing the body at the 

 sides, the inflexed part occupied wholly by the wide, flat and entire 

 epipleurte, which are margined beneath by a narrow flat raised 

 line ; prosternum long before the coxa, the metasternum long, 

 very much longer than the first ventral, the episterna moderately 

 narrow, increasing in width jDosteriorly, the suture straight and 

 very feeble ; abdomen convex, the last three segments more tumid 

 at the sides and intruding somewhat vipon the epipleurae, the 

 sutures fine, straight, the third broadly sinuate, becoming trans- 

 verse laterally ; coxae very small, the anterior rather narrowly, the 

 posterior very widely, separated ; legs short, moderately stout, the 

 tibiae increasing in width from base to apex, without terminal 

 spurs, the tarsi short, cylindric, compact, with a few short seti- 

 form spines beneath, the first three joints of the posterior sub- 



