Memoirs on the coleoptera

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 exposed
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.