90 COLEOPTERA OF NORTH AMERICA. 



families of Coleoptera, but in no other are they associated with 

 an entirely corneous abdomen having seven or eight visible seg- 

 ments. 



We have followed Mr. Fauvel in his primary division of the 

 family into two sub-families, and the arrangement of the tribes, 

 adopted by him, is here introduced, with but little alteration, 

 except in the order in which they are placed; which is precisely 

 that of Duval, by whom the table was originally devised. 



Antcnnse 10- or 11-jointed, not abruptly capitcite, and not received in 

 cavities. Stapuylinin^. 



Antennae 9-joiuted, with abrupt club, received in cavities on tlie under 

 surface of the prothorax. MICKOPEPLI^^. 



Sub-Family I.— STAPHYLINIXAE. 



This sub-family contains a large number of tribes, which may 

 be tabulated as follows: — 



Antennae inserted upon the front. 2. 



Antennae inserted at the anterior margin of the head ; 3. 



Antennae inserted under the sides of the front ; 4. 



2. Prothoracic spiracles visible, front coxae large ; antennae not suddenly 



clavate; 4th joint of max. palpi distinct. I. Aleochakini. 



Prothoracic spiracles not visible, front coxae small ; antennae slender, 



distinctly clavate ; 4th joint of max. palpi obsolete. III. Stenini. 



3. Antennae liliform or gradually thickened, 4th joint of mas-palpi 



distinct. II- Stapuylinini. 



4. Front coxae conical, prominent ; 5. 

 Front coxae transverse. . IX- Protinini. 

 Front coxae globose. X- Piestini. 



5. Nj ocelli. *^- 

 Ocelli two, situated at or behind the vertex. VIII. Homalini. 



6. Hind coxae transverse ; ' • 

 Hind coxae conical. IV- P^derini. 



7. 7tli abdominal segment retractile. • 



7th abdominal segment exposed. VII. Oxytelini. 



8. Prothoracic spiracles visible; epipleurfe well defined. V. Tachypokim. 

 Prothoracic spiracles concealed ; epipleuraj ill-defined. 



VI. PHLOiOCHAKINI. 



Tribe I.— AI.EOCHARIIVI. 



The prothoracic stigmata in this tribe are not covered by the 

 inflexed portion of the pronotum; but, without reference to this 

 character, the insertion of the antennae upon the front will distin- 

 -uish the genera from those of all other tvibes except the first, 



