374 MEMOIRS ON THE COLEOPTERA 



gutor series, are less visibly abbreviated than in any of the preced- 

 ing generic groups, in some cases becoming slightly elongate. The 

 species are so numerous, small in size and usually so poorly repre- 

 sented in collections, that Cryobius should be considered perhaps 

 the most difficult, taxonomically, of the subfamily Pterostichinae, 

 and my own collection includes but very few of the known compo- 

 nents. A large consignment, recently received from St. Paul Island, 

 in Bering Sea, includes five species, of which four seem worthy of 

 description at the present time as follows: 



Cryobius otariidinus n. sp. Elongate-suboval, convex, rather stout 

 and shining, with very obscure subcupreous lustre on the elytra, black 

 above and beneath, the legs dark rufous; head rather large and but feebly 

 convex, nearly three-fourths as wide as the prothorax, with very moder- 

 ate though prominent eyes, placed near the base, the neck very short; 

 mandibles black, rufous distally; palpi deep black with abruptly pale 

 tip; antennae rather thick and short, black, the first joint rufous to pice- 

 ous; prothorax nearly one-half wider than long, widest barely before the 

 middle, the sides rather strongly rounded, finely reflexed throughout, 

 oblique and broadly, feebly sinuate basally, the angles right and sharp; 

 base transverse, equal in width to the deeply sinuate apex, not margined 

 at the sides; apical angles prominent, blunt at tip; impressions feeble; 

 inner foveee deep, extending almost to the middle, curving outwardly 

 basally, the outer wanting or represented by a very small feeble basal 

 puncture; surface between the inner foveae and the sides evenly convex; 

 elytra one-half to three-fifths longer than wide, oval, with evenly arcuate 

 sides, a third or more wider than the prothorax, widest at the middle; 

 striae fine and feeble, unimpressed, with feeble but evident uneven punc- 

 tulation, the scutellar very short; intervals flat; dorsal punctures four, 

 the two posterior closer. Length (9 ) 8.0-9.0 mm.; width 3.2-3.35 mm. 

 Alaska (St. Paul Island). Two specimens. 



By the characters given by LeConte, this species would come 

 near vindicatus Mann., but the first and second striae are not united 

 behind by a "deeper hook," and the scutellar stria is very short as 

 a rule, though in the second specimen, having slightly more elon- 

 gate elytra, it is long, forming the oblique basal part of the first 

 stria; vindicatus is from Kodiak Island. 



Cryobius beringi n. sp. Elongate, convex, shining, black, without 

 distinct metallic lustre, the legs piceo-rufous; head elongate, the eyes 

 moderate in size and prominence; maxillary palpi deep black, the extreme 

 tip abruptly pale testaceous; antennae black, the basal joint rufescent; 

 prothorax a third wider than long, the base feebly sinuate medially, 

 straight and unmargined laterally, about as wide as the moderately sinu- 

 uate apex, widest just before the middle, where the sides are feebly, sub- 

 prominently rounded, thence feebly converging and slightly arcuate to 



