STAPHYLINID^E. 155 



Colpodota insulsa n. sp. Elongate-fusoid, moderately convex, rather 

 alutaceous, the punctures fine and dense, strongly asperulate, minute but 

 rather close-set on the abdomen; color black, the elytra dark, the legs pale, 

 brown; head moderately transverse, slightly inflated basally, the eyes at 

 somewhat more than their own length from the base, the tempora broadly 

 arcuate; antennae moderate in length, rather stout though very moderately 

 and gradually incrassulate, blackish, barely at all paler basally, the first 

 three joints diminishing only just visibly in thickness, the first not quite as 

 long as the second, twice as long as wide, the third similar to the second but 

 much shorter, the fourth fully as long as wide, the outer joints similar, 

 slightly transverse, the last pointed, as long as the two preceding; prothorax 

 strongly transverse, much wider than the head, widest at base and there dis- 

 tinctly wider than the elytral base and somewhat wider than their apex, 

 the sides evidently converging from the rounded base to the apex and strongly 

 arcuate, scarcely at all impressed; elytra not quite parallel, rather short 

 and transverse, the suture very slightly longer than the prothorax; abdomen 

 at base slightly narrower than the elytra, gradually somewhat strongly taper- 

 ing to the rather acute apex, the fifth tergite not as long as the two pre- 

 ceding combined. Length 1.65 mm.; width 0.3 mm. Rhode Island (Boston 

 Neck). 



Not closely allied to either of the preceding, being smaller, less 

 stout, less convex and more acuminate posteriorly. The antennae 

 are also quite different in the much less obconic third joint, which 

 is here almost similar to the second, though much shorter. 



Colpodota acuminata n. sp. Rather slender, fusiform, slightly shining, 

 very deep black throughout, the elytra dark piceous, the legs rather pale 

 piceous; punctures fine, asperate and very dense, feeble and sparser on the 

 abdomen; head slightly wider than long, feebly swollen basally, the eyes 

 moderately large, the carinae entire; antennae rather long and slender, deep 

 black throughout, only very feebly incrassate, the second joint somewhat 

 longer than the first or third, thinner than the former, fourth and fifth fully 

 as long as wide, the sixth slightly, the tenth distinctly, wider than long, the 

 last well developed, pointed, as long as the two preceding; prothorax moder- 

 ately transverse, rounded at base, the sides distinctly converging and feebly 

 rounded from base to apex, much wider than the head and just visibly 

 wider than the elytral base; elytra well developed, with slightly diverging 

 and nearly straight sides, the suture about a fifth longer than the prothorax; 

 abdomen evidently narrower than the elytra, evenly and very strongly 

 tapering to the decidedly acute apex, the fifth tergite long. Length 1.4 mm.; 

 width 0.35 mm. Rhode Island (Boston Neck). 



In the type the pronotum has, along the median line from near 

 the apex to a little behind the middle, a strong, deep and symmetri- 

 cal elongate impression, which does not seem to be due to shrinking 

 of the integument; it is however a very unusual character. The 

 species is, however, very distinct in other ways, differing from in- 

 sulsa in its very much more acute abdomen and longer antennae. 



