52 MEMOIRS ON THE COLEOPTERA 



Limnichalia n. gen. 



The general characters of this genus conform throughout to those 

 of others here assigned to the Limnichini, the special modifications 

 being the sulcate prosternum, the fine, posteriorly arcuate epistomal 

 suture, the continuous oblique cariniform margins from the eyes to 

 the epistomal apex, concealing the attachment of the antennae, the 

 more continuous elytral epipleura, these being sinuated for the tips 

 of the hind femora in repose, the long pale antennae, with peculiarly 

 modified second joint and very long loose and gradually broadened 

 compressed 5-jointed club and the rather long slender tarsi. The 

 type may be described as follows: 



Oval, moderately convex, acutely ogival at apex, polished, pale castaneous 

 in color, the legs pale brown, the mouth-parts and antennae pale 

 flavate, the vestiture sparse, consisting of moderately long fine 

 erect recurved hairs, dusky in color and not variegated; epistoma 

 strongly reticulate, chagrined and indistinctly punctate, the entire 

 remainder of the upper surface devoid of fine ground sculpture of 

 any kind; head with rather large shallow and separated punctures 

 anteriorly, which fade completely away posteriorly, the latter surface 

 and entire pronotum with sparse, excessively minute punctules, not 

 larger than the base of the hairs and not larger or closer laterally 

 on the latter; prothorax about three times as wide as long, the strongly 

 converging sides evenly and distinctly arcuate, the basal lobe almost 

 completely obsolete, the surface evenly convex, not impressed 

 medially, having, slightly behind the middle, a short transverse and 

 feebly arcuate series of fine close-set asperulate punctures; scutellum 

 large, with arcuate sides, acutely ogival, barely longer than wide; 

 elytra fully a fourth longer than wide, widest near basal third, the 

 sides evenly rounded, gradually converging and less arcuate poste- 

 riorly to the rather acute apex, very finely, feebly, rather sparsely 

 punctulate; abdomen narrowly parabolic, convex, moderately 

 shining, finely, feebly, asperulately but rather closely punctate, 

 the hairs longer and more numerous posteriorly, pale, yellowish, 

 the sutures fine, the last two but slightly more distinct than the 

 two anterior. Length 1.6 mm.; width 0.85-0.9 mm. Isthmus 

 of Panama (Colon) *colonica n. sp. 



As before stated Eulimnichus sublavis, of Sharp, described from 

 Guatemala, also belongs to this genus but differs in its darker color, 

 stronger sculpture and less distinct vestiture; there are doubtless 

 many other Central American species, among which the minute 

 Eulimnichus ephistemus Sharp, may be included. 



There are two other Central American genera assigned by Dr. 

 Sharp to the Limnichini, besides Phalacrichus and Limnichalia here 



