THE SHORT-WINGED S( 'A V KN( i Kl! HHKTLES. 873 



second. Thorax quadrangular, slightly longer than wide, sides nearly 

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

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

 Ira slightly wider than thorax, together one-half longer than wide; disk 

 with a median row of four or live punctures; detlexed portion of side mar- 

 gins densely punctate. Abdomen iridescent, rather coarsely and densely 

 punctate. Length S-.ll mm. 



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

 curs beneath cover, especially in sandy places near water. 



714 (2115). QUEDIUS VEBNIX Lee., 1'roc. Anier. Phil. Sue., XVII, 1S7S, 3S'J. 

 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 Iroiit; sides moderately 

 curved, base broadly rounded; disk punctate as in ffrn.r. punctures of basal 

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

 long, sutural striae deep; disk punctate as in fcro.r, those on the detlexed 

 sides less numerous. Abdomen iridescent, sparsely punctate. Length 12- 

 14 mm. 



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

 especially so along the margins of lakes. April 2-September 27. 



Tribe II. STAPIIYL1N1NI. 



Head without suture or raised line each side beneath the eyes. 

 Anienmv distant from each other at base, never elbowed, inserted 

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

 bles; labrum always bilobed, thorax more or less convex, frequently 

 densely punctured, with the side margins double, the innexed 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 live in decaying fungi, carrion, dung 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 represented in In- 

 diana. 



KEY TO INDIANA GENERA OF STAPHYLININI. 



(/. Fourth joint of maxillary palpi shorter than third; size large, 10 or 



more mm. 



li. Thorax punctured, densely pubescent. XXX. LISTOTROPHUS. 



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

 separated. XXXI. CREOPHILUS. 



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



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



d. Middle coxa^ slightly separated: abdomen narrowed at tip; thorax 



punctured, pubescent. XXXII. STAPHYLINUTS. 



