38 MEMOIRS ON THE COLEOPTERA 



Antennae partially sheltered in repose in slight sublateral basal depressions 

 on the upper surface of the head and slightly under the anterior 

 edge of the pronotum, blackish and dense in substance, the club 

 gradual, rather compact and 3-jointed; eyes vertical in plane; 

 pubescence dual, consisting of very short appressed hairs, with 

 others longer and more erect intermingled; elytral punctures gener- 

 ally somewhat serial basally; epistomal suture rather coarse and 

 sulciform 7 



2 Eyes very convex and prominent, rather coarsely faceted and con- 

 spicuously visible from a vertical viewpoint, the sides of the front 

 above them not acute or cariniform ; anterior part of the front abruptly 

 more declivous, subvertical, the very coarse sculpture obliterating 

 the epistomal suture ; antennae inserted within open foveee at the ends 

 of the epistomal suture before the eyes, the base not concealed from 

 abo\ e ; prosternum sulcate ; sculpture of the body coarsely cribrate as 

 a rule. [Type Limnichus punctatns Lee.]. Nearctic to neotropical. 



Limnichites 



Eyes vertical in plane and more or less finely faceted, the edges of the 

 front above them acute and projecting, almost wholly concealing 

 them from a vertical viewpoint; upper surface of the head more 

 gradually declivous anteriorly 3 



3 Antennae blackish and denser in substance; surface sculpture more 

 pronounced as a rule, the body generally less attenuate posteriorly . 4 



Antennae fragile, paler, apparently free, the club long and very loose; 

 prosternum sulcate; body more acutely pointed behind 6 



4 Prosternum sulcate; sculpture of the front usually strong and longi- 

 tudinally coalescent, generally obscuring or obliterating the episto- 

 mal suture, the epistoma transverse, broadly rounded; antennae 

 with the outer joints closely joined, truncate, the last joint large, 

 inserted under the oblique acute sides of the front, the base con- 

 cealed from a dorsal viewpoint, the emarginations indicating the 

 ends of the epistomal suture very small; bod)' rather obtuse behind, 

 with moderate sculpture. [Type Limnichus obscurus Lee.]. Ne- 

 arctic and Sonoran Eulimnichus 



Prosternum not at all sulcate; sculpture rather feeble, that of the head 

 not conspicuous, the epistomal suture fine but evident, the epistoma 

 broadly rounded; antennae inserted within large sinuses before the 

 eyes and behind the lateral part of the epistoma, their base not con- 

 cealed from above, much longer and more loosely articulated than 

 in Eulimnichus, the outer joints much less rapidly and usually only 

 feebly enlarged, with the apices of the joints acuminate and not 

 truncate; body more pointed behind as a rule 5 



5 Acute side margins of the prothorax ending anteriorly in a rather 

 prominent angle at some distance behind the apex, the sides thence 

 to the apex obtusely rounded in section and not produced; hypomera 

 with a broad flat and slightly elevated inner margin; epistomal 

 suture very fine but evident, slightly tumescent; epistoma thickened 

 at the sides. [Type Limnichus versicolor Wattl.]. Palaearctic. 



*Pelochares 



