STAPHYLINID^: 153 



Hilarina Csy. 



This subgenus of Datomicra has possibly been confounded with 

 Meotica hitherto, but it differs completely in the form of the head 

 and eyes and includes some of the smallest known species of the 

 Athetse; the following has recently been received from Dr. W. E. 

 Britton: 



Datomicra (Hilarina) mina n. sp. Strongly shining, moderately con- 

 vex, brownish-testaceous, the head piceous, the abdomen black though 

 gradually dark reddish basally and at apex; punctures extremely fine, 

 sparse and indistinct, very sparse on the elytra, the vestiture moderately 

 long, stiff and sparse, pale, the legs pale; head large, but little wider than 

 long, fully four-fifths as wide as the prothorax, the eyes very prominent, 

 at about their own length from the base, the tempora less prominent, 

 subparallel and feebly arcuate to the base, the carinae fine, not quite 

 entire; antennae pale, very short and stout, the first joint almost as long 

 as the next two, the third shorter than the second, obconic, less than one- 

 half longer than wide, four and following transverse, increasing, subsimi- 

 lar, the outer joints very short, more than twice as wide as long, the last 

 obtuse, fully as long as the two preceding; prothorax not quite twice as 

 wide as long, much wider near the apex than at base, the sides strongly 

 rounding anteriorly, converging and nearly straight basally; elytra 

 about a fifth or sixth wider and two-fifths longer than the prothorax; 

 abdomen much narrower than the elytra, parallel, with feebly and evenly 

 arcuate sides, the fifth tergite not quite so long as the fourth. Length 

 I.I mm.; width 0.22 mm. Connecticut (Double Beach), Viereck. 

 In fungi. 



Differs from both particula and inanis in its much more promi- 

 nent eyes, and, from the former, also in its still more converging 

 sides of the prothorax basally; in the latter the sides of the pro- 

 thorax are parallel and evenly rounded, this being a more slender 

 and parallel species than either particula or mina. 



The following was overlooked in my previous revision of the 

 genus and is much smaller in size: 



Datomicra (Hilarina) atomica n. sp. Slender, moderately convex, shin- 

 ing, pale luteo-flavate, the abdomen black posteriorly, the head black- 

 ish, the elytra a little darker than the prothorax or basal part of the 

 abdomen, the legs pale; punctures fine, not close and rather obscure; 

 pubescence rather long and coarse but not close; head but little wider 

 than long, subquadrate, five-sixths as wide as the prothorax, the front 

 broadly concave anteriorly, the eyes large and very prominent, at three- 

 fourths their length from the base, the tempora less prominent, parallel, 

 rounding at base, the carinae wholly wanting; antennae short, stout, 

 strongly incrassate, pale in color and with stiff bristling setae, the first 

 joint almost as long as the next two, the third with a slender parallel 



