Casey — Observations on the Staphylinidae. 255 



circularly rounded from eye to eye, minutely, almost Invisibly punctu- 

 late, the frontal impression feeble; antennae somewhat longer, the 

 apical part^ rather more rapidly incrassate ; protborax narrower, dis- 

 tinctly more elongate, equal in width to the head, the sides less angular 

 and less prominent anteriorly, the puntulation similarly very minute, 

 sparse and inconspicuous, thesubbasal impression rather finer and|more 

 shallow ; elytra nearly twice as wide as the prothoraz and fully two-fifths 

 longer, the sides rather more strongly diverging from base to apex, the 

 minute punctulation extremely sparse but abruptly unusually dense and 

 granuliform near the scutellum; abdomen nearly as in robutta through- 

 out but somewhat narrower. Length 2.5 mm. ; width 0.75 mm. Cali- 

 fornia (Lake Co.) longicoUisn. sp 



The unique type of impressifronSy described above, has the 

 elytra singularly crumpled in large feeble folds, which is 

 probably a deformity caused in drying after emergence from 

 the pupa, but it is rather remarkable that the folds and de- 

 pressions should be so perfectly symmetric bilaterally, each 

 depression and each of the two long oblique folds of one 

 elytron being perfectly matched on the other ; the species can 

 be known by the small prothorax and relatively large head, 

 in addition to the coarse impressed punctulation of the former. 

 The considerable series of robiista collected by Koebele and 

 Harford in the Sta. Cruz Mts., is very homogeneous, and the 

 two specimens from Los Angeles which I have separated 

 under the name minuscula, although resembling it rather 

 closely in general form and sculpture, are notably smaller in 

 size. The measurement of length giveji in the original de- 

 scription of Falagria laeviiLscula is undoubtedly an error; it 

 is highly probable that no example of Lissagria ever attained 

 the length of 3.5 mm., which is the dimension given by 

 LeConte. 



Falagrriota n. gen. 



The species of this genus are smaller, much more slender 

 and frailer insects than those of Lissagria and have the sides 

 of the prothorax very moderately converging toward base, 

 with the median sulcus, so well developed in that genus, re- 

 duced to a very fine, obsolescent and wholly inconspicuous im- 

 pression. The antennae are shorter, slender toward base but 

 more incrassate distally, the scutellum more finely but evenly 



