THE SHOET-WINGED SCAVEXGEE BEETLES. 337 



Fenyes. — "A Preliminary Systematic arrangement of the Aleo- 

 eharinas of the United States and Canada," in Entom. News. 

 XIX, 1908, 56-65. 



The work of Director L. Ganglbauer has been the one principally 

 di-awn upon for the present classification of the subfamily. 



KEY TO THE INDIANA TRIBES OF AiEOCHAEIN^. 



a. Head prolonged In a beak in front; inner lobe of the maxillfe entirely 

 corneous or horn-like, its inner side with teeth or spines. 

 6. All the tarsi with three joints. Tribe I. Dinopsini, p. 337. 



66. Front and middle tarsi with four, hind tarsi with five joints. 



Tribe II. Myll<bnini, p. 338. 

 aa. Head not prolonged in a beak in front ; inner lobe of the maxilliia 

 corneous on the outer side, coriaceous or leather-like on the inner 

 side. 

 c. All the tarsi with four joints. 



d. AntenniE with 11 joints. Tribe III. Hygkonomini, p. 338. 



dd. Antennae with ten joints. Tribe IV. Oligotini, p. 339. 



cc. Front and middle tarsi with four, hind tarsi with five joints. 



Tribe V. Bolitochakini, p. 339. 

 ceo. Front tarsi with four, middle and hind tarsi with five joints. 



Tribe VI. Myemedoniini, p. ;!44. 

 fccc. All the tarsi with five joints. Tribe VII. Aleochaeini, p. 360. 



Tribe I. DINOPSINI. 



Head prolonged in a liroad and .short licak in front. Lobes of 

 tlic maxiUaj very long and narrow, llie inner lobe entirely horn- 

 like, its inner side with unequal teeth on apical lialf. .Maxillary 

 palpi very long and slender, apparently only three-jninted, the 

 fourth .joint minute, scarcely visible, acicnlate. Labial palpi with 

 the basal joint very large, elongate, the second and third joints 

 small. All the tarsi with three joints. 



The tribe contains only the single genus: 



I. DiNOPSis Matth. 1838. (Gr., "wonderful -f face.") 



Antenna' slender, head I'athc]- lai'gc; thorax transverse, elytra as 

 long as or one-third longer than thorax ; abdomen strongly narrowed 

 behind the middle and with two anal styles. 

 630 (2088). DiNOPSis Americana Kr., J Aim. Ent., XI, ls.57, 38. 



Elongate, slender, depressed. Piceous, suhnpaque, sparsely clothed witli 

 very fine short, prostrate pubescence ; antennse, labrum, palpi and tarsi dull 

 yellow. Thorax convex, more than twice as wide as long, sides rounded on 

 apical half, hind angles rectangular ; surface, as ^\e\l as that of elytra and 

 abdomen, very minutely and densely granulate-punctate. Elytra one-third 

 longer than thorax, the granules arranged in oblique striae. Length 3 mm. 



Putnam and Franjdin counties; rare. June 11-September 25. 



