STAPHYLINIDAE. 63 



B. Antennae 11-jointed (torsi 5-jointed in all of our genera) ; 



a. Elytra longer than the breast, equably punctured ; ligula not nar- 



rowed anteriorly ; 

 Abdomen margined ; 



Mesosternum carinate ; maxillary palpi filiform ; 

 First joint of hind tarsi very long. Leucoparyhus. 



First joint of hind tarsi not elongated. Copkopokds. 



Mesosternum not carinate ; 

 Maxillary palpi filiform. Tachinus. 



Maxillary palpi subulate. Tachtpoeus. 



Abdomen not margined ; body finely pubescent. Conosoma. 



b. Elytra as long as the breast, smooth, or with three rows of punctures ; 



ligula narrowed at the apex ; 



Maxillary palpi filiform. Bolitobifs. 



Maxillary palpi with the last joint conical, acute. Bkyopoeus. 



Maxillary palpi subulate. Mycetopokds. 



The species of Bolitobius usually have the head much elongated ; 

 when, however, the head is oval, they approach closely to the ge- 

 nus Quedius of the next tribe, but are recognized by the antennas 

 being inserted at the lateral margin of the front, near the eyes, 

 and not at the anterior angle of the frontal margin, as in Quedius. 



Tribe III.— STAPHYUNINI. 



In this tribe the spiracles of the prothorax are visible, but the 

 antenna? are situated at the anterior margin of the front, and 

 differ in position in the three sub-tribes. The anterior coxa? are 

 large and conical; the trochanters of the hind legs are promi- 

 nent ; the abdomen is strongly margined. 



Lateral margin of the thorax simple. Quediini. 

 Lateral margin of the thorax double ; 



Antenna? distant. Staphylinini. 



Antennae approximated. Xantholinini. 



Sub-Tribe 1.— Quediini. 



The antenna? are inserted at the anterior point of the lateral 

 margin of the front ; the thorax is smooth and glabrous, with 

 but few dorsal punctures (except in Euryporus), and its lateral 

 margin is single and acute, as usual. 



The body is usually fusiform, sometimes linear. The species 

 .'•re found in various situations; Quedius under stones and bark 

 in damp forests, Euryporus and Acylophorus near water. The 



