370 Trans. Acad. Sci. of St. Louis. 



with spongy pubescence; lateral bead of the prothorax only visible to- 

 ward base, wholly obliterated anteriorly 26 



20 — Prosternum shorter and less developed before the coxae, its posterior 

 margin broadly angulate as usual, the angulation cuspidiform; head 

 nerer more than feebly modifled at the sides, the basal angles 

 rounded 11 



Prosternum larger before the coxae, arcuato-truncate behind under the 

 latter, its surface evenly and feebly convex throutihout and wholly de- 

 void of carina at any part, the hyponaera not Inwardly dilated anteriorly ; 

 bead with an obtusely rounded, polished and impunctate longitudinal 

 line from the eyes posteriorly as in Henperolinus 24 



21 — Prosternum not carinate, somewhat narrowed anteriorly by the in- 

 wardly dilated by pomera; basal joint of the hind tarsi longer than the 

 second; antennae stouter than usual and more compact toward tip, with 

 the basal joint relatively much longer, the punctuation fine 28 



Prosternum carinate along the middle, not narrowed anteriorly by an 

 inward development of the bypomera; basal joint of the hind tarsi 

 about equal in length to the second; antennae never more than moder- 

 ately stout 23 



tS — Anterior angles of the prothorax obsolete nearly as in Habrolinus, broadly 

 rounded, the sides subparallel; body smaller and extremely slender; 

 antennae somewhat as in Habrolinus, the second joint slender and un- 

 usually elongate, longer than the next two combined, the third obtrape- 

 zoidal and slightly longer than wide, the outer joints very compact and 

 much thiclcetied, the tenth two and one-half times as wide as long; 

 palpi nearly as in Lithocharodes, the very oblique fourth joint extremely 

 slender, aciculate and two -thirds as long as the third; inner pair of 

 frontal grooves short, broadly and feebly impressed, parallel and very 

 indistinct, the ocular obsolete and represented by a small rounded 

 punctiform depression at the inner margin of the eyes; gular sutures 

 very fine, feebly, evenly arcuate, gradually and feebly converging 

 throughout to the base, where they are most approximate but still dis- 

 tinctly separated; legs tdender. Nearctic Atlantic regions. 



Nematolinos 



Anterior angles of the prothorax rather distinct, the sides converging thence 

 to the base; second anteunal joint but little longer than the third, both 

 distinctly elongated, the third equaling the fourth and fifth combined; 

 third palpal joint only moderately elongate, the fourth small, slender, 

 acutely conical, oblique and rather more than half as long as the third; 

 gular sutures flue, approaching each other to the middle or before the 

 latter, and thence parallel and extremely approximate to the base; eyes 

 moderate; median pair of frontal crooves fine, rather short and par- 

 allel, the oblique ocular subobsolete ; neck but little more than a fourth 

 as wide as the head: body only moderately slender. Tropical and Sub- 

 tropical Atlantic North and South America Lithocharodes 



38 — Body larger as a rule than in the two preceding genera, the head well 

 developed, the third joint of the maxillary palpi elongate, enlarged dls- 

 tally, the fourth small, generally about one-half as long as the third, 

 slender, conical and oblique; gular sutures arcuate, becoming ex- 

 tremely approximate from rather before the middle to the base; scalp- 



