THE SHORT- WINGED SCAVENGER BEETLES. 



467 



Group D. 



Small, slender species having' the side margin of thorax acute, 

 the flanks deeply but narrowly concave; prosternal sutures want- 

 ing; coxal fissures short and closed; hind angles of thorax obtuse. 



901 (2745). Bledius coedatus Say, Trans. Amer. Phil. Soc, IV, 18.34, 461; 

 ibid. II, 576. 



Elongate, very slender. Black ; elytra dull yellow with a wide fuscous 

 sutural stripe ; antemise and legs dull yellow, the former dusky at tip. Head 

 broad, flat, finely granulated. Thorax one-third wider than long, sides sub- 

 parallel, rounded behind; disk finely granulate, very sparsely and irregu- 

 larly punctate, the median line distinct. Elytra slightly wider and one- 

 third longer than thorax, finely and rather densely punctate. Abdomen at 

 base narrower than elytra, finely granulate, nearly smooth above, distinctly 

 punctate beneath. Length 4 mm. 



Lake County; rare. May 21. A sea-coast species which will 

 probably be found all along the shore of Lake Michigan. 



Platystethus americanus Erichs. 7 3 mm. in length, black, shin- 

 ing, elytra fusco-piceous, tibiae and tarsi pale, is recorded from Cin- 

 cinnati, and very probably occurs in southern Indiana. 



LXXlIT. Oxytelus Grav. 1806. (Gr. ; "a pointed end.") 



Small, depressed black or piceous species having the head usu- 

 ally as wide as thorax, the middle eoxag somewhat separated and the 

 front tibia? with a single row of spines, 



KEY TO INDIANA SPECIES OF OXYTELUS. 



a. Thorax coarsely sculptured, more or less shining. 



1). Head rounded immediately behind the eyes, which are large and 

 prominent ; thoracic grooves deep ; length 3.5-4 mm. 



902. SCULPTUS. 



hi). Head prolonged behind the eyes, the latter moderate in size. 



c. Sides of thorax crenulate ; piceous, legs and base of antennae dull 

 yellow ; front flat ; length 4.2-5 mm. . rtjgosus. 



cc. Sides of thorax entire. 



d. Front of head concave, its apical margin elevated ; outer thoracic 

 groove feeble ; length 3.5-4.5 mm. 903. pennsylvanicus. 



del. Front of head flat, not margined at apex. 



e. Vertex flat, not channeled ; thorax strongly punctured ; male 

 with apical margin of front extended forward in a short, 

 sharp process ; length 2.5-3 mm. 904. insignitus. 



ee. Vertex convex, feebly channeled. 



f. Front polished ; dorsal grooves of thorax distinct ; length 

 1.7-2 mm. 905. suspectus. 



ff. Front opaque; dorsal grooves obsolete; length 2.3 mm. 



906. PLACUSINI'S, 



