434 CASEY 



Triorophus Lee. 

 In this genus the body is much larger than usual in the pres- 

 ent tribe, elongate in form, with elongate-oval and strongly 

 inflated hind body, the elytra in the normal species having rows 

 of coarse punctures, becoming obsolete behind. The epistomal 

 lobe is very prominent and is somewhat constricted at base, the 

 bulbiform basal swelling of the mandibles fitting when closed 

 into the reentrant space at each side, and the surface behind the 

 lobe is strongly swollen, forming a rounded prominence. The 

 eyes are moderate, distinctly convex but not ver}^ prominent, 

 and the lateral lobes of the front before them are strongly 

 rounded anteriorly and externally, being, as a general rule, 

 much more prominent than the eyes. There is a single long 

 straight supra-orbital carina, supplemented generally by other 

 shorter inner folds. The antennse and legs are unusually long 

 and moderately slender, the tarsi cylindric, in great part nude 

 but with a few short stiff spines, more numerous beneath ; basal 

 joint of the posterior as long as the last or somewhat longer. 

 The prothorax has an unusually distinct marginal bead at the 

 sides, for in most of the related genera, this bead is in great 

 part wanting, the edge being more or less acute in section but 

 punctured and immarginate. At the apical angles there are 

 several long vibrissae similar to those noted in the Trimytini. 

 The scutellum is small and transverse, not projecting posteriorly 

 between the elytra, the latter strongly margined at base and 

 with the epipleura; narrow throughout ; the met-episterna are 

 also narrow and subparallel. Triorophus is a rather large 

 genus, the species known to me being definable as follows : — 



Surface glabrous or nearly so ; elytra with regular, coarsely punctured 

 series, obsolete toward tip 2 



Surface evidently pubescent or with the prothorax more coarsely and 

 closely sculptured, the elytra at best faintly striato-punctate and 

 sometimes with confused punctuation 17 



2 — Pronotum with a single system of punctures which are always 



well separated 3 



Pronotum with coarse punctures, mingled with others which are dis- 

 tinct but much smaller; integuments glabrous 16 



3 — Elytra strongly shining, sometimes alutaceous toward tip 4 



Elytra entirely opaque ; form very stout ; each puncture bearing a 



very small hair 15 



