190 Journal New York Entomological Society. ["^'q'- xxvi. 



ON SOME GENERA AND SPECIES OF THE FAMILY 

 OSTOMID^. 



By Chas. Schaeffer, 

 Brooklyn, N. Y. 



At the request of Mr. Chas. Leng I prepared a list of the genera 

 and species of this neglected family for his new checklist of Coleop- 

 tera. In this a new genus, several new species and some synonymy 

 were included which have never heen published. Therefore it was 

 thought advisable to publish this short paper in advance of a revision 

 of the family which I hope to publish in the near future. 



Two tribes occur in our fauna, two more, the Nemozomini or 

 Nemosomatinse and Leperini or Leperininae, are recognized by Reitter, 

 Sharp and Leveille, but the characters given are rather vague. 



Inner lobe of maxillae very short, much shorter than the outer lobe and with- 

 out hook at apex. Head large, as wide, or nearly as wide as the pro- 

 thorax at apex ; eyes not prominent. Elytra with narrow side-margin 

 and narrow epipleuras. Form more or less elongate Tenebroidini 



Inner lobe of maxillae as long or nearly as long as the outer lobe, terminating 

 at apex into a sharp, curved, hook-like process. Head small about 

 half as wide as the prothorax at apex ; eyes prominent. Elytra with 

 lateral margin more or less explanate ; epipleuros wide. Form oval or 

 elliptical Ostomini 



Tribe Tenebroidini. 



1. Anterior margin of prosternum separated from the anterior margin of 



pronotum by the more or less projecting apical angles 7 



Anterior margin of prosternum not interrupted at sides by projecting 

 apical angles but continuous with the anterior margin of pronotum.. 2 



2. Head with a rather deeply and longitudinally impressed line at middle ; 



apex emarginate, each side of the emargination produced into a sub- 

 acute lobe; mandibles deflexed ; antennal club bilaterally dilated.... 3 

 Head wthout impressed longitudinal line at middle ; apex more or less 

 trisinuate; mandibles porrect; antennal club dilated only internally. .4 



3. Prosternum flat, not compressed between the coxs ; prothorax with 



distinctly raised lateral margin Nemosoma Latr. 



Prosternum compressed and narrow between the coxae ; prothorax 

 without distinctly raised lateral margin Cylidrella Sharp 



4. Elytra at base with a deep and more or less rounded, sub-humeral 



impression ; last joint of antennal club elongate-oval and not wider 



