364 FAMILY XI. STAPH YLINID^. 



KEY TO INDIANA SPECIES OF ALEOCHAEA. 



a. Form rather broad and stout, rarely parallel ; mesostemum without 

 trace of carina at any point 



b. Sixth dorsal segment of abdomen simple and subtruncate at apex in 

 both sexes. 



c. Antennse stout and spindle-shaped, not reaching base of thorax, the 



joints strongly transverse ; thorax wholly black. 



d. Elytra wholly black ; thorax finely and sparsely punctate ; length 



5-7.5 mm. 693. lata. 



dd. Elytra in great part red ; thorax coarsely and roughly punctate ; 



length 4 mm. 694. eubrlpes. 



cc. Antennae more slender, reaching middle of elytra, the joints less 



transverse ; thorax wholly black ; elytra red, the base and sides 



narrowly black. 695. PtEUBALis. 



hb. Sixth dorsal segment of abdomen with a number of sharp, triangular 



teeth at apex in male, simple in female ; thorax with sides dull red ; 



elytra in great part red. 696. lusteioa. 



ail. Form more slender, linear, parallel ; mesosternum carinate. 



c. Color in great part black or piceous ; first three dorsal segments of 



abdomen impressed at base. 

 /. Thorax finely and evenly punctate over its entire surface ; elytra 

 wholly piceous. 697. sculphventbis. 



ff. Thorax unevenly punctate, the punctures at middle of disk in two 

 uneven rows, the space between the rows smooth. 

 !j. Dorsal segments of abdomen ^coarsely punctate, especially so in 

 the basal impressions; eljiira each with a large, well defined, 

 rounded, dull yellow spot at inner angle near suture. 



698. BIMACULATA. 



Og- Dorsal segments of abdomen finely and more densely punctate; 

 elytra each indefinitely dull reddish at apex near suture. 



699. BrPUSTTJLATA. 



ee. Color pale reddish-brown ; first four dorsal segments of abdomen im- 

 pressed at base. 700. tucn-iTGA. 



693 (2053). Aleochaea lata Grvh., Col. Micr. Brunsv., 1S02, 186. 



Very stout and broad. Deep black, shining, 

 sparsely clothed with grayish pubescence; tarsi 

 reddish-brown. Thorax two-thirds wider than 

 long, strongly rounded at base; sides feebly 

 curved, converging toward apex, disk minutely 

 and siiarsely punctate. Elytra slightly wider 

 and about as long as thorax ; coarsely, closely 

 and roughly punctate. Abdomen at base as wide 

 as elytra, thence feebly but distinctly narrowed 

 to apos, marked with coarse, sparse, oval punc- 

 tures. Length 5-7.5 mm. (Fig. 156.) 



Southern half of Stnte. frequent. March 



Fig. 156. Lino shows ...uraisi^e. 24-September 25, Occurs beneath carrion. 

 (Original.) ]\ Fating April 29. 



