Casey — Observations on the Staphylinidae. 181 



what infnscate, the basal joint and the legs thronghoat pale brownish- 

 testaceous; pubescence rather long, abundant, fulvous and distinct; 

 integuments finely, very obsoletely reticulate, the abdomen excessively 

 minutely strigilate in transverse wavy lines but strongly shining; head 

 three -fifths as wide as the prothorax, arcuately narrowed behind the 

 moderately large but not prominent eyes, the punctures extremely 

 minute, sparse and indistinct; antennae extending at least to basal third 

 of the elytra, slender basally, gradually somewhat strongly incrass ate 

 distally, with the joints moderately transverse, closely joined and nar- 

 rowed but little from their apices to their bases, the second and third 

 much elongated and equal; prothorax not quite a third wider than long, 

 convex, the sides very slightly though obviously converging from base 

 to apex and evenly, moderately arcuate, the base broadly arcuate, the 

 disk apparently somewhat flattened toward the middle posteriorly; 

 punctures extremely minute, rather sparse and scarcely observable; 

 elytra large, wider and much longer than the prothorax, the suture 

 about a third longer than the median line, .the punctures very fine and 

 feeble, close-set; abdomen much narrower than the elytra, parallel 

 toward base, gradually and arcuately narrowing in apical half, extremely 

 minutely, feebly and remotely punctulate, the depressions almost wholly 

 impunctate. Length 3.0 mm. ; width 0.88 mm. California (Tehachepi 

 Pass), — H. F. Wickham disjnncta n. sp. 



The extremely minute close-set strigilation of the abdomen 

 is a feature wholly wanting in Rheochara fenyesi Bernh., 

 and in Rheochara nehulosa^ there is, besides the close strong 

 puHctuation, only a feeble coarse reticulation visible toward 

 the tip of the abdomen. The abdomen is also narrower, in 

 proportion to the width of the elytra, than in any other genus 

 of the subtribe known to me. This is in fact a widely isolated 

 type. 



Rheocharella n. gen. 



In this genus the general habitus is nearly as in Rheohioma 

 and the hind tarsi are similarly extremely slender and filiform 

 though shorter than the tibiae, with the basal joint much 

 longer than the last and as long as the next three combined, 

 but there are so many points of divergence that no other 

 course seems appropriate but the suggestion of generic separa- 

 tion. The very slender and acutely rounded process of the 

 mesosternum extends to the rather strongly produced and nar- 

 rowly rounded, though much broader metasternal projection, 

 without trace of the long discontinuity characterizing Rheo- 



