152 MEMOIRS ON THE COLEOPTERA 



Pseudota nanulina n. sp. Very small, not stout, moderately convex 

 and shining, the punctures fine, close-set and strongly asperate through- 

 out anteriorly, feeble and sparser on the abdomen; color deep black 

 throughout, the elytra barely at all picescent, the legs nearly black; 

 pubescence inconspicuous; head slightly wider than long, fully three- 

 fourths as wide as the prothorax, the front with a small deep rounded 

 impression at the centre; eyes prominent, at three-fourths their length 

 from the base, the less prominent tempora rounding to the base, the 

 carinae fine, entire; antennae rather short, black, feebly incrassate, the 

 second joint nearly as long as the first, the third shorter, fourth slightly, 

 the outer joints moderately, transverse, the last pointed, as long as the 

 two preceding; prothorax nearly one-half wider than long, much rounded 

 at base and with obtuse and rounded angles, the sides parallel and very 

 moderately rounded, the surface with a small and very feeble rounded 

 ante-scutellar impression; elytra moderate, at base about a sixth wider, 

 the suture two-fifths longer, than the prothorax; abdomen much nar- 

 rower than the elytra, gradually feebly tapering, with nearly straight 

 sides, from base to apex, the fifth tergite a little longer than the fourth. 

 Length 1.28 mm.; width 0.37 mm. British Columbia (Metlakatla), 

 Keen. 



Wholly different from the preceding but forming, with vana and 

 the following, a small natural group of the genus, characterized by 

 the small size, deep black coloration, strongly asperate punctures 

 and other features; it differs from vana in its smaller size, much more 

 slender form, relatively larger head and narrower prothorax and in 

 many other ways. 



Pseudota formalis n. sp. Similar to the preceding in general form and 

 size and also in its deep black coloration, but more shining, with the 

 punctures much finer, less asperate and mutually twice as distant, the 

 head, eyes and antennae almost similar, the front however without a 

 central foveiform impression though with the median line very feebly, 

 somewhat broadly impressed from the middle to the base; prothorax 

 similar in general form but not evidently impressed and smaller in size, 

 less greatly though evidently exceeding the head in width; elytra larger, 

 at base fully a fourth wider, the suture three-fifths longer, than the pro- 

 thorax; abdomen longer, much narrower than the elytra, perfectly 

 parallel, with just visibly and evenly arcuate sides, the fifth tergite 

 obviously longer than the fourth, the first three each with a distinct 

 transverse impression at base. Length 1.4 mm.; width 0.4 mm. British 

 Columbia (Metlakatla). Keen. 



The smaller, sparser punctures, smaller prothorax and larger 

 elytra obviously differentiate this species from the preceding. 



