312 THE CANADIAN ENTOMOLOGIST. 



ON SOME NEW COLEOPTERA, INCLUDING FIVE NEW 



GENERA. 



BY THOS. L. CASEY, ST. LOUIS, MO. 



The principal motive in publishing the present paper is the desire to 

 fulfill a promise made to Rev. J. H. Keen^ several years ago, to write a 

 description of an apparently new and very interesting Staphylinid dis- 

 covered by him in British Columbia. For one reason or another I was 

 compelled to defer this work, but having now an opportunity to comply 

 with the wishes of my valued friend and correspondent of many years, the 

 present occasion is made available to draw up a little paper, containing in 

 addition a number of novelties received from various collectors from time 



to time. 



Bryothinusa, n. gen. — Staphylinidfe. 



Body moderately slender, exactly parallel, rather depressed on the 

 upper surface, the integuments dull, very finely and densely sculptured, 

 the pubescence short, abundant and semi-erect ; head strongly deflexed, 

 fully as wide as long, the sides parallel and arcuate, the base very broad 

 and inserted within the apex of the prothorax ; eyes small, anterior, flat, 

 elongate-oval, consisting of ten to twelve coarse convex facets ; 

 infralateral carina wholly wanting ; epistoma broadly arcuate ; labrum 

 about twice as wide as long, rather prominent, broadly rounded at tip ,; 

 antenna? long and slender, very feebly incrassate distally, the joints loosely 

 joined, the first and second elongate and subequal, the second as long as 

 the third and fourth combined ; mentum very large, flat, trapezoidal, 

 maxillary lobe long, slender, hooked at tip, loosely serrate within ; labial 

 palpi slender, 3Jointed, the maxillary large and well developed, densely 

 hairy ; prothorax at apex as wide as the head, gradually and moderately 

 narrowed thence to the base, the sides nearly straight, the hypomera 

 delimited from the pronotum by a very fine beaded edge, broad in the 

 middle and narrowing arcuately to base and apex ; scutellum very large, 

 triangular ; elytra siiorter than the prothorax, the suture not beaded ; 

 abdomen more than half as long as the body, parallel, the segments not 

 impressed at base ; metasternum very short, the episternum large, 

 gradually and rapidly narrowed anteriorly ; legs rather short and stout ; 

 cox£e very large, the intermediate acitabula apparently well defined 

 throughout; tibiae pubescent and finely subspinulose j tarsi short and 

 rather thick, 4-4-5-jointed, the first four joints of the posterior diminish- 

 ing gradually and slightly in length, the fifth not quite as long as the 

 preceding three combined. 



