BYRRHID^E 39 



Acute side margins of the prothorax continuous to the apex, the latter 

 somewhat produced and rather finely acute from a dorsal viewpoint; 

 hypomera without trace of the inner flat margin of Pelochares, 

 continuous to the suture separating it from the prosternum and its 

 epipleura; groove along the elytral side margins finer; epistomal 

 suture extremely fine and feeble, barely evident, the epistoma not 

 at all thickened laterally; antennae of the same general type but 

 with the outer joints less elongate, with, their apical prolongations 

 less acute. [Type L. tenuicornis Csy.]. Nearctic of the Pacific 

 coast Lichminus 



6 Antennae very pale yellow, the first two joints thick, third to eighth 

 slender, the last three slender and elongate-oval, loosely connected, 

 pubescent; body ovate, somewhat as in Atomaria, sparsely clothed 

 with short and erect recurved hairs. [Type P. atomnrius Slip.]. 

 Neotropical *Phalacrichus 



Antennae pale, slender, the first two joints larger, the second transverse 

 and somewhat oblique, third to sixth slender and cylindric, the 

 third and fourth the shortest, the outer five joints forming a long 

 slender compressed and very feebly and graduaJly enlarged club, 

 with the joints fully as wide as long, broadly truncate at tip and 

 bristling with long hairs, the eleventh rounded; body ovate, pointed 

 behind, sparsely clothed with short recurved hairs; converging sides 

 of the front before the eyes acute and unbroken, concealing the 

 antennal insertion from above, the epistomal suture very fine but 

 evident, sinuate; posterior trochanters angulate. [Type L. colonica 

 n. sp.]. Neotropical *Limnichalia 



7 Prosternum broader, evenly convex; antennae inserted in small ex- 

 posed lateral foveae just behind the lateral part of the epistoma and 

 not far in advance of the eyes, the sides of the front without the 

 prominent edge of the preceding genera and with a large transverse 

 impression just behind the antennae; scutellum elongate and very 

 acute. [Type L. sericens Duft.]. Paljearctic *Limnichus 



Prosternum sulcate; antennae, sides of the front and antennal insertion 

 as in Limnichits, but with the latter much more distant from the 

 eyes, the lateral impression behind them smaller and more acutely 

 impressed; scutellum broader, equilatero-triangular or very nearly. 

 [Type Limnichus oral us Lee.]. Nearctic to neotropical. 



Limnichoderus 



In the treatment of the Central American species Dr. Sharp 

 has adopted too broad an interpretation of Eulimnichus and has 

 mingled with some that are evidently true Eulimnichus a number 

 of other elements; subl&vis, for instance, and possibly ephistemus 

 as well, is a member of the essentially tropical genus Limnichalia, 

 described as new below, and the Eulimnichus confertus and admi- 

 randus of Sharp, almost certainly belong to Limnichites, a genus 

 very distinct from Eulimnichus in the structure of the front and 

 eyes, as well as in the remarkable cribrate sculpture of the body. 



