THE SHOKT-WINGED SCAVENGER BEETLES 



L23 



aa. Color nearly uniform, the elytra not distinctly paler excepl toward the 

 tip ; larger, 7 or more mm. 

 b. Antennae very stout, more slender toward apex, the middle joints 

 rounded, never longer than wide. 

 c. Elytra bicolored, black basally and reddish on apical third, as long 

 as thorax; length 10 mm. 809. procerum. 



cc. Elytra wholly black or piceous. 



(I. Elytra much longer and wider than thorax, a fourth longer thai] 

 wide; legs and antennae dark reddish-brown; length 7 mm. 



SPISSICORNE. 



<hl. Elytra equal in length to thorax; legs wholly pale reddish- 

 brown ; length 8-10 mm. ; sixth ventral of male with a length- 

 wise groove near base, not notched at tip. 810. armatum, 

 bb. Antennae only moderately stout, the joints at least one-half longer 

 than wide, obconic; sixth ventral of male more or less notched at 

 tip. 



e. Elytra not longer, and often distinctly shorter than thorax. 



/. Antennae not longer than head and thorax, the joints less than 

 twice as long as wide; gular sutures straight, nearest together 

 at base of head. 



!/. Punctures of elytra rather fine, sparse and inconspicuous; 

 notch of last ventral of male wide and deep, distinct; length 

 7.5-9 mm. 



7/. Head and thorax sparsely and rather finely punctured. 



811. SIMILE. 



7/7/. Head and thorax densely and rather coarsely punctured. 



812. INSANUS. 



gg. Punctures of elytra coarse, uneven and conspicuous; last ven- 

 tral of male truncate, the notch very small; length 6.5- 

 7.5 mm. simplex. 

 //. Antennae slender, longer than head and thorax, the middle joints 

 fully twice as long as wide; gular sutures curved, nearer to- 

 gether at middle of area behind the mouth ; color black, legs 

 and antennae paler ; length 6.7-7.5 mm. cruralis. 

 ee. Elytra much longer than thorax ; abdomen narrower than elytra, 

 the last ventral of male broadly and semicircularly notched; 

 black, antennae and legs brown; length 6.5-7.5 mm. concolor. 



L. tricolor Lee, was described from Detroit, Michigan, and L. 

 spissicorne Casey from Massachusetts and Detroit, so that one or 

 both of them are apt to be found in Indiana. 



809 ( ). Latelrobium procerum Casey, Trans. Acad. Sci. St. L.. XY, 



1905, 82. 



Elongate, rather slender. Black, shining; elytra becoming gradually 

 but distinctly reddish on apical third: legs reddish-brown; antennae piceous. 

 with a reddish tinge. Head equal in width to thorax, sides parallel, sparsely, 

 rather finely and irregularly punctate. Thorax oblong, sides nearly straight, 

 feebly converging toward base, finely and rather sparsely punctate. Elytra 

 rather closely and finely punctate. Abdomen as wide as elytra, minutely 

 and rather densely punctate. Length 9-10 mm. 



