200 Journal New York Entomological Society. t^'o'- xxvi. 



Tenebroides opaca Reit. Verd. Nat. Vcr. Briinn XIII, 1875, p. 6g. 



The localities given by Reitter for this species are " Columbia et 

 Amer. bor." The male has on each side of the submentum a fulvous 

 hair-pencil, a character vi^hich is found only in our americaniis. The 

 description, however, does not agree with americanus nor any of the 

 described varieties. Many localities of Reitter's material are wrong 

 and I believe that the N. Amer. locality for this species is also a 

 mistake. 



Tenebroides patruelis Reit. Verh. Nat. Ver. Briinn XIII, 1S75, p. 70. 



Reitter's specimens from which he described the species are said to 

 be from " Brazilia and Carol, merid." The N. Amer. locality is very 

 likely wrong as I am unable to apply his description to any of our 

 North American species. 



Tribe Ostomini. 



1. Front coxal cavities closed Calitys 



Front coxal cavities open behind 2. 



2. Mentum transverse ; antennal grooves feeble 3- 



Mentum oval, minute ; antennal grooves deep 5- 



3. Elytra with more or less distinct costse, upper surface smooth 4. 



Elytra without costae, irregularly punctate ; upper surface distinctly pubes- 

 cent Ostomodes 



4. Hook-like process of inner lobe of maxillae situated externally ; antennal 



club loosely jointed, last joint ovate, narrowing towards apex; larger 



species about 5-10 mm Ostoma 



Hook-like process of inner lobe of maxillae situated internally ; antennal 

 club compact, last joint short, widening towards apex, small species about 

 3 mm Lophocateres 



5. Elytra without costae, irregularly punctate ; metasternum on each side below 



middle coxk with an arcuate line; convex species Th3rmalus 



Ostoma grossa and oblonga. 



These two European species are wrongly included in our list. 



Ostoma oregonensis new species. 



Very close to quadrilineata Melsh., color castaneous, prothorax more shin- 

 ing, less strongly narrowing towards apex and punctures more widely sepa- 

 rated than in quadrilineata; intervals of elytra with three rows of moderately 

 coarse and well separated punctures between the costae, the row next to each 

 costa regular, the punctures of the median row rather widely separated and 

 irregular. Length 7.5 mm. 



Dillev, Oregon. 



