Casey — Observations on the Staphylinidae. 167 



minute punctulation finer and sparser; antennae slender, only very 

 slightly and gradually Incrassaie dislally, barely one-h.ilf loager than 

 the head, the second joint as lonsi as the next two together, the tenth 

 three-fourths wider than long, the ekventh as long as the preceding 

 two combined, very obtusely pyriform, truncate at tip; prothorax un- 

 usually elongate, only just visibly wider than long, fully us wide as the 

 elytra, the sides moderately converging from base to apex and feebly ar- 

 cuate; basal angles l)roadly rounded as usual, the median 1 )be of tbe base 

 strongly rounded; elytra short, the sides ranch shortf-r than the sides 

 of the prothorax, the suture two-thirds as loni as the nvdian line, the 

 punctures very coarse and asperate but; much Irss clo>e-set than in 

 siilcicollis, rhe flanks impunctate, narrowly at base, very broadly and 

 almost to the lower edge behind, with a few punctures just behind the 

 humeri; discal punctures externally tending to form oblique series; 

 abdomen slightly narrower than the elytra, parallel, finely, rather closely 

 punctate, somewhat broadly inipunctiie along the middle; hind tarsi 

 fully as long as the tibiae, the basal joint almost a'^ long as the next three 

 combined. Length 4.5 ram.; width 1.05 mm. California (San Diego). 



rtebilicoriiis n. sp. 

 Moderately slender and much smaller, convex, parallel, polished, black, the 

 elytra dark piceo-rufous throughout, the legs and autennue pale brown- 

 ish red; head relatively large, three-fifths as wide as the prothorax or 

 more, with a few large s>catteied punctures, the antennae nearly as in 

 the preceding but somewhat more rapidly incrassate distally, the sec- 

 ond joint scarcely as long as the next two comhioed, the tenth twice as 

 wide as long, the eleventh more pointed; prothorax fully as wide as the 

 elytra, scarcely a fifth wider than Ions, the sides only slightly converg- 

 ing from base to apex and distinctly arcu.<ite, punctured nearly as in 

 the other species, except that the punctures near the base, just outside 

 of the sulci, tend to form a short transverse series, the minute punctula- 

 tion very fine, sparse and indistinct; elytra rather shoit, moderately 

 transverse, the sides equal in length to those of the prothorax, 

 the suture fully two-thirds as long as the median line, the punctures 

 very coarse and asperate but less close-set than in sulcicollis and tend- 

 ing to form oblique series throushout, the upper part of the flanks im- 

 punctate except before the middle, very broadly so behind; hind tarsi 

 even somewhat longer than the tibiae but with the basal joiat only as 

 long as the next two combined. Length 2.7-2.9 mm.; width 0.65 mm. 

 California (San Diego) cyliudrella n. sp. 



The tendency of the coarse eljtral punctures to range 

 themselves into oblique series in cylindrella and partially so 

 in dehilicornis, is a rather singular character ; this tendency 

 is not so obvious in the first three species of the table, and, 

 where observable at all, the series are less oblique; the large 

 impunctate areas at the sides of the elytra are also a dis- 

 tinguishing feature as in many Xantholinids. 



