Casey — Observations on the Staphylinidae. 203 



The material in my cabinet is not sufficiently extensive to 

 enable me to make a thoroughly satisfactory investigation of 

 the somewhat varied male sexual characters of this genus, 

 which, not only in this respect but in general structure and 

 habitus, is rather heterogeneous. Most of the species of the 

 table resembling the typical carbonaria^ are described from 

 uniques and they all have the sixth ventral rounded at tip, 

 but whether they are all females or whether the male in 

 typical Gnypeta lacks the apical sinus of the elongate forms 

 having more developed antennae and sometimes having the 

 first four abdominal tergites impressed at base, is unknown to 

 me at present. There are some special characters as well, 

 for example the female of atrolucens, which is also aberrant 

 in general appearance, has the sixth ventral plate sharply 

 angulate at tip, this being the only instance known as yet. 

 Some of the species strongly recall Tachyusa in general 

 appearance and I have but little doubt that, when the very 

 numerous species still to be discovered can be fully studied, 

 the genus as above constituted will be divided into a number 

 of generic or subgeneric groups. It seems scarcely worth 

 while to point out more than one of these at present, but the 

 characters of the species identified above as baltifera Lee, 

 from description alone, seem to warrant the erection of a 

 special subgenus because of the form of the prothorax and 

 especially the rounded hind angles of the latter. 



Teliusa n. gen. 



The single type of this genus, while resembling a normal 

 Gnypeta somewhat in general outline, differs very greatly in 

 facies because of the fine dense sculpture and the dense vesti- 

 ture of very short fine pale hairs, clothing the entire body, 

 legs and antennae, so that a satisfactory examination of the 

 tarsal joints is a matter of some difficulty; it may be described 

 as follows : — 



Form rather stout and convex, pale rufo -testaceous in color, the head black- 

 ish, the elytra somewhat clouded except toward the apex and near the 

 humeri ; posterior segments of the abdomen black, the legs and anten- 

 nae pale, the latter somewhat feebly infumate distally; entire body 



