412 Memoirs on the Coleoptera 



characters of a general nature, as among the Amarinae and Pter- 

 ostichinae of the Carabidae for example, and also in the lar^e genus 

 Reichenbachius of the Pselaphidae. 



Odontocorynus Schon. 



This is another genus founded solely upon sexual peculiarities of 

 the male, the antennal funicle in that sex frequently being enlarged 

 and denticulate distally, and the club having a lateral basal tooth. 

 As stated in my revision (p. 577), there are two well defined groups, 

 which are also of a sexual nature, one, represented by scutellum- 

 alhum, having the beak nearly similar in form in the two sexeS; and 

 the other having a strongly sculptured and basally bent beak in 

 the male, but cylindrical, in great part smooth and more evenly 

 arcuate in the female. The scutellum and basal thoracic lobe are 

 conspicuously albido-squamose in all the species of both groups. 

 The species of the second group are in reality very numerous in our 

 fauna, but the first, or scutelliim-albiim group, is rather more limited, 

 though still extensive. Odontocorynus is in fact by far the largest 

 Centrinid genus of our fauna, and it was largely because of the 

 multiplicity of forms having, in some parts of the series, very 

 puzzling superficial resemblances, that I passed over it without 

 much discriminative study in my revision of the Barinae. The 

 delimitation of the species has cost a vast amount of time, given as 

 occasion permitted during some years past, and I hope that the 

 various taxonomic forms defined below as species may prove to be 

 of permanent value; there is not the slightest doubt that this will 

 prove to be the case with most of them at all events. The following 

 table contains those species allied to scutellum-album: 



Strial intervals with generally confused sculpture and vestiture, some- 

 times partially unilinear 2 



Strial intervals each with a single line of scales, narrowly confused toward 

 base on some of the intervals; body srhall in size 14 



2 — Prothorax widest before the base, the sides curving inward basally. 

 Stout, oval, strongly convex, shining, black, the elytra and legs 

 faintly subpiceous, the beak and antennae black; beak in the female 

 slender and finely, sparsely punctured throughout, feebly arcuate, 

 abruptly more so at base, as long as the elytra, the antennae inserted 

 at four-sevenths; prothorax transverse, three-fifths wider than long, 

 the sides strongly converging and broadly, evenly arcuate from 

 near basal fourth to the wholly unconstricted apex, the basal lobe 



