Casey — Observations on the Staphylinidae. 299 



coarse indented pseudo-punctures almost throughout; abdomen moder- 

 ately tapering from base to apex, the sixth tergite rounded in the female. 

 Male unlinown. Length 1.7 mm. ; width 0.65 mm. New York (Catskill 



Mts.) subpunctata n. sp. 



Body smaller and stouter, more fusiform and convex, with rather dense 

 integuments, which are distinctly micro-reticulate throughout, testa- 

 ceous in color, the elytra rather more yellowish and without distinct 

 darker maculation, the abdominal cloud rather large, black or paler and 

 indefinitely limited, the head piceous-black or paler, sparsely punctate 

 laterally; antennae nearly attaining the middle of the elytra, moder- 

 ately slender, somewhat infuscate distally, the fifth joint slightly 

 elongate, the tenth very feebly transverse, the eleventh much shorter 

 than the two preceding combined, more obtuse at apex than usual ; 

 prothorax one-half wider than long, distinctly wider than the head, 

 obtrapezoidal, rounded at the sides anteriorly, the latter feebly con- 

 verging and less arcuate thence to the base, the surface with the usual 

 punctures distinct, convex; elytra as in suhpunctata but less transverse 

 and with the indentated punctures smaller and sparser, particularly 

 toward the external apical angles; abdomen strongly conoidal. Male 

 with a low polished rounded and slightly transverse tubercle near the 

 apex of the fifth tergite, the sixth with two long and slender, arcuate, 

 incurved and pointed apical processes in median third of the total 

 width, the bottom of the inclosed space transversely subsinuate and 

 almost perfectly even, the adjoining surface transversely swollen and 

 polished; female with the sixth tergite broadly arcuato-truncate at 

 apex. Length 1.25-1.4 mm.; width 0.65 mm. Canada (Grimsby), Iowa 



and Wisconsin (Bayfield;) lacustrig n. sp. 



Var. A — Form nearly similar but still smaller and more slender, the 

 micro-reticulation of the head and pronotum almost wholly obsolete 

 as are also the large indented punctures of the elytra, these being 

 replaced by the usual very fine sparse and inconspicuous punctures. 

 Male with almost Identical sexual characters, the flat tubercle of the 

 fifth tergite being smaller, rounded and not transverse, the processes 

 and sinus of the sixth similar. Length 1.1 mm.; width 0.58 mm. 



Pennsylvania (near Philadelphia) inconspicua n. var. 



18 — Prothorax distinctly or strongly transverse, as a rule, as usual 14 



Prothorax but slightly wider than long; body more slender and sub- 

 parallel 19 



14 — Prothorax moderately transverse, generally very distinctly narrower 



than the base of the elytra 15 



Prothorax very strongly transverse, very nearly twice as wide as long.... 18 



16 — General color pale 16 



General color dark ' 17 



16 Form rather stout, moderately convex, polished, feebly micro-reticu- 

 late throughout, the head blackish, the elytra feebly infumate at the 

 outer apical angles, the abdominal cloud black, well developed on and 

 near the fourth tergite ; head with sparse coarse punctures laterally, 

 the antennae short, slightly longer than the head and prothorax, rather 

 stout, joints five to ten distinctly transverse, those beyond the third or 

 fourth pale brownish-fuscous in color; prothorax slightly, though 



