THE SHORT- WINGED 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 SUBFAMILIES OF STAPHYLINIDAC. 



a. Antennae 11- (rarely 10-) jointed, without abrupt club and not received 

 in cavities on the under side of thorax:. 

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

 front margin. 



c. Front coxae large, conical ; hind coxae transverse, contiguous ; fourth 

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

 thoracic spiracles visible. Subfamily I. Aleocharijnlf:, p. 336. 

 cc. Front coxae small ; hind coxae small, conical, widely separated ; 

 fourth joint of maxillary palpi obsolete ; antennae slender, the 

 last three joints suddenly larger ; eyes large and prominent. 



Subfamily III. Stenin^e, p. 400. 

 lib, Antennae not inserted upon the front between the eyes; hind coxae 

 contiguous. 



<1. Antennae 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. Staphylinin^, p. 307. 

 dd. Antennae inserted at the sides of the front, of the head. 



c. Front coxae conical, prominent, rarely (Tribe Proteinini) trans- 

 verse. 

 f. Hind coxae conical. 

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

 jointed ; front coxae long, strongly projecting from the pro- 

 sternum ; eyes not prominent ; antennae inserted under a 

 more or less prominent frontal ridge. 



Subfamily IV. P^ederin m, p. 414. 

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

 palpi at least one-half as long as second. 



Subfamily VII. Eu.f;sthetinje. p. 458. 

 //. Hind coxae transverse or triangular. 



7;. 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. Tachyporin.e. p. 441. 

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

 ill defined, not limited by a carina: thoracic spiracles 

 hidden. Subfamily VI. Phlceocharin.f:, p. 457. 



7//?. Seventh ventral segment exposed; antennae inserted under 

 the widened margins of the front of head. 



L 22— 23402] 



