THE FAMILY LYCTID^. 117 



DIVISION I. 



Elytral punctures confused, or somewhat striate, but if so, the series never impressed. 



Subdivision A, pages 117-118. 

 Elytral punctures distinctly seriate, the series distinctly impressed. 



Subdivision B, pages 118-119. 

 Subdivision A. (Trogoxylon Le Conte.) 



Head with a distinct tubercle over the eye; pronotum quadrate, with the sides not 

 convergent posteriorly Section al,page 117. 



Head without tubercle over the eye; pronotum with the sides more or less convero-ent 

 posteriorly Section a2, page n7. 



Section al. 



Length 3 to 4.5 mm.;- ferruginous. Pronotum opaque, very densely, evenly punc- 

 tured; anterior margin slightly trisinuate; sides sinuate, scarcely convergent 

 posteriorly; anterior and posterior angles very prominent, right, not at" all 

 rounded; median impression narrow, deep near the center of the disk, broadly 

 expanded toward anterior and posterior margins. Elytra subparallel, just visibly 

 wider at base than prothorax, extremely finely, densely, confusedly punctured; 

 pubescence fine, decumbent, confused. Head with front subconvex, densely,' 

 evenly punctiu-ed; frontal angles very prominent, narrowly rounded; side mar- 

 gins of epistoma forming an acute, slightly reflexed tooth; antennse slender, club 

 feeble, ovate. Abdomen slightly shiny below, excessively minutely punctured. 



impressus Comolli, page 121. 

 Section a2. 

 * 

 Pronotum broader than long, the vestiture very short, coarse, and bristling; pro- 

 sternum distinctly punctured throughout Subsection bl, page 117. 



Prothorax as long or longer than wide anteriorly, the pubescence rather long, fine, and 

 decumbent or subdecumbent; prosternum not punctured or but very feebly so 

 near its side margins Subsection b2, page 117. 



Subsection hi. 



Length 3 mm.; body nigro-piceous, short, broad, stout, subconvex, densely clothed 

 with short, stiff bristles. Prothorax feebly shiny; side margins strongly con- 

 vergent posteriorly; anterior margin broadly rounded; punctures large, deep, 

 more dense posteriorly; median impression shallow, broad; pro-episternal area 

 coarsely, distinctly punctured. Elytra broad, shiny, subparallel, densely, 

 coarsely punctured, the punctures feebly seriate. Head with front subconvex' 

 densely, evenly punctured; epistoma slightly depressed, side margins scarcely 

 reflexed, with a dense fringe of coarse bristles, which also occur on the angles of 

 the front; antennae stout. Abdomen subopaque below. 



punctatus Le Conte, page 121. 

 Subsection b2. 



Elytral punctures in distinct series; epistoma with side margins strongly reflexed. 



Series cl, page 117. 



Elytral punctures confused, without distinct serial arrangement ; epistoma not reflexed 



^t sides Series c2, page 118. 



Series cl. 



Length 2.2 to 2.5 mm.; very slender, parallel, compressed, castaneous throughout, 

 strongly shining. Prothorax with side margins rather strongly convergent pos- 

 teriorly; anterior margin strongly arcuate; anterior angles strongly rounded, 



