THE SH0ET-WIX(;ED SCAVENTGEK BEETLES. 373 



second. Thorax quadi-angular, slightly longer tbau wide, sides nearly 

 straight, base rounded, disk with only two punctures in the dorsal rows, a 

 larye one near side margin of apical half and a few on basal margin. Ely- 

 tra slightly wider than thorax, together oue-half longer than wide; disk 

 with a median row of four or five punctures; deHexed portion of side mar- 

 gins densely punctate. Abdomen iridescent, rather coarsely and densely 

 punctate. Length s-11 mm. 



Western half of State; frequent. April 1-November 24. Oc- 

 curs beneath cover, especially in sandy places near water. 



714 ^2115). QuEDiLs vEEXix Lee, Proc. Amer. Phil. Sue. XVII, ISTS, 389. 

 More robust. Uniform black, strongly shining. Head oval, with the 

 usual coarse punctures, the small ones only behind and beneath the eyes. 

 Thorax large, broader than long, narrower in front; sides moderately 

 curved, base broadly roimded ; disk punctate as In fcroj:, punctures of basal 

 margin very small. Elytra as wide as thorax, together slightly wider than 

 long, sutural strife deep; disk punctate as in ferox, those on the deflexed 

 sides less numerous. Abdomen iridescent, sparsely punctate. Length 1:!- 

 14 mm. 



Western half of State, as far south as Vigo County; frequent, 

 especiallj- so along the mai-gius of lakes. April 2-September 27. 



Tribe II. STAPHYLlNI>;i. 



Head Nvithout suture or raised line each side beneath the eyes. 

 Antenna- distant from each other at base, never elbowed, inserted 

 on the front margin of the front, inside of the base of the mandi- 

 bles ; labrum ah\ ays bilobed, thorax more or less convex, frequently 

 densely punetiu'ed, with the side margins double, the inflexed por- 

 tion between the two marginal lines smooth, variable in width; tho- 

 racic spiracles visible. The tribe embraces the largest species of 

 the family. They li^'e in decaying fungi, carrion, dimg and decom- 

 posing organic matter in general. 



The North American -members of the tribe are at present dis- 

 tributed among 13 genera, seven of which are repre.seuted in In- 

 diana. 



KEY TO rNDIASA GENERA OF STAPHYLIXIXI. 



a. Fourth Joint of maxillary palpi shorter than third; size large, 10 or 



more mm. 



h. Thorax punctured, densely pubescent XXX. Listotbophus. 



bb. Thorax smooth, pubescent only on front angles; middle coxae widely 



separated. XXXI. Cbeophilus. 



((((. Fourth joint of maxillary palpi equal to or longer than third. 



c. Ligula emarginate; size larger, 11 or more mm. ; form usually robust. 



(/. Middle cox;e slightly separated: abdomen narrowed at tip; thorax 



punctured, pubescent. XXXII. Staphtusis. 



