234 MEMOIRS ON THE COLEOPTERA 



pies in my cabinet were taken at West St. Modest, Labrador, by 

 Mr. Sherman. 



Leiocnemis Zimm. 



The typical American species of this genus is the well known 

 Zabrus avidus of Say, subsequently placed in the genus Pelor, of 

 Bonelli, and still later described by Dejean as Amara confinis. It 

 has somewhat the aspect of a Bradytus of the exaratus type, though 

 with much shorter prothorax, which is also much more sinuate at 

 the sides basally even more so than in Bradytus apricarius. The 

 absence of pubescence on the inner side of the posterior male tibiae 

 is not a positive bar to its assignment to Bradytus, as this feature 

 is extremely variable in that genus, and, in Bradytus cequalis, there 

 is no more vestige of such pubescence than in Leiocnemis avida. 

 Leiocnemis can however be maintained as distinct from Bradytus 

 on other grounds. The margination of the prosternal lobe, for ex- 

 ample, is extremely feebly denned, and in some examples exists 

 hardly more than in Curtonotus; then again, the pronotal sides are 

 rather broadly reflexed, a condition present in no Bradytus known 

 to me. The mentum tooth in avida is short, broad and trapezi- 

 form, the apex not even evidently sinuate. The male prosternum 

 has a small and unimpressed area of very fine punctures, as in many 

 species of Celia, as well as Bradytus. The species is rather abun- 

 dant from Nova Scotia to Colorado. 



Bradytus Zimm. 



Although without much doubt valid as a genus, Bradytus is even 

 less consistent in uniformity of characters usually relied upon in 

 defining genera, than any other of the Amarinse. The mentum 

 tooth varies from narrowly triangular, with truncate apex, as in 

 apricarius, to an extremely broad, short and widely trapeziform 

 shape, as in exaratus, or either sinuato-truncate or bilobed, as in 

 most of the species. The male has a small oval punctured pro- 

 sternal area in the majority of species, but in nainensis and prob- 

 ably also in glacialis this is much modified, and in immundus it is 

 wanting. Usually the scutellar stria is without attendant anterior 

 fovea, but in immundus this is present; this character is, however, 

 inconstant also in Amara and Tricena. The most persistent, and 

 in fact the only decisive generic characters, are the submedially 



