THE SHOET--\VIN"GED SCAVENGER BEETLES. 335 



known North American species is scattered through many volumes 

 and the more important papers will be mentioned under the respec- 

 tive tribal headings. 



The family is divided into eleven subfamilies, nine of which are 

 known to be represented in the State, while the other two may be. 



KEY TO SUBFAMirjES OF STAPHYLINIDJE. 



((. Auteimte 11- (rarely 1U-) jointeil. without abrupt club' and not received 

 in cavities on tbe under side of thorax. 

 b. Antennae Inserted upon the front between the eyes, and behind their 

 front margin, 

 c. Front eoxte large, conical ; hind coxse transverse, contiguous ; fourth 

 joint of maxillary palpi distinct; antennae not at all clavate; 

 Jyjracic spiracles visible. Subfamily I. Ai.eochaein.s;, p. 336. 

 cc* Front coxae small; hind coxse small, conical, widely separated; 

 fourth joint of maxillary palpi obsolete; antennie slender, the 

 last three joints suddenly larger ; eyes large and prominent. 



Subfamily III. Stenin^, p. 400. 

 bb. Antennae not inserted upon the front between the eyes; hind coxse 

 contiguous. 

 £?. Antennse inserted at the front margin of the front of the head, fili- 

 form or gradually thickened ; fourth joint of maxillary palpi dis- 

 tinct. Subfamily II. Staph yunin-B, p. 367. 

 d(l. .\nteniuE inserted at the sides of the front of the head. 



','. Froiiteoxfe conical, prominent, rarely (Tribe Proteimni) trans- 

 verse. 

 f. Hind coxse conical. 

 (;. Tarsi 5-jointed, very rarely the middle and hind ones -4- 

 joihted ; front coxse long, strongly projecting from the pro- 

 sternum ; eyes not prominent ; antennae inserted under a 

 more or less prominent frontal ridge. 



Subfamily IV. P^edeein^, p. 414. 

 gg. Tarsi 4-jointed; front coxae short; first joint of maxillary 

 - palpi at least one-half as long as second. 



Subfamily VII. Eujssthetin.e, p. 458. 

 tf. Hind coxae transverse or triangular. 



h. Seventh ventral segment retractile and hidden. 

 > ■ i. Head inclined, narrower than thorax and more or less in- 



serted in the latter ; body convex, conical and pointed 

 behind ; thoracic spiracles visible ; epipleura distinctly 

 limited by a carina. 



Subfamily V. Tachypobin^, p. 441. 



U. Head directed forward ; body slender, depressed ; epipleura 



ill defined, not limited by a carina ; thoracic spiracles 



hidden. Subfamily VI. Phlceooharin.?e, p. 457. 



lil\. Seventh ventral segment exposed; antennae inserted under 



the widened margins of the front of head. 



[22—23402] 



