THE DARKLING BEETLES. 



1261 



2329 (7506). Diaperis maculata Oliv., Encyc. Meth., VI, 1791, 273. 



Broadly oval, convex. Black; head be- 

 tween the eyes and elyti-a, in great part, 

 orange-red; the latter being marked with 

 black as follows : a sutural line not reaching 

 scutellum and wider on apical half, a rounded 

 spot on middle of basal third and another 

 elongate and smaller one near the margin, a 

 large irregular spit on apical half reaching 

 from mar;,'in nearly to sutural line. Thorax 

 nearly three times as wide as long, finely and 

 sparsely punctate. Elytra with rows of rather ^I'lt h^ ofVrva?i, k/ofiaie';' "."an- 

 fine, feebly impressed punctures; intervals tenna of beetle. (After Riley.) 

 flat, minutely and sparsely punctulate. Length G-6.5 mm. (Fig. 504.) 



Throughout the State; common and gregarious beneath bark, 

 especially that of elm, and in fungi. March 16-September 9. 



XVIII. Arrhenoplita Kirby. 1837. (Gr., "strong -i- v.-eapon.") 



Small elongate-oval, bluish or greenish species, having the epi- 

 pleurffi abbreviated and the males (in our species) armed with two 

 short horns on clypeus and two longer ones on vertex. Two of the 

 three recognized species occur in the State. Formerly listed under 

 Hoplocephala. 



2;?30 (7508). Akrhenoputa viridipennis Fab., Syst. Bleut, II, 1801, 586. 



Elongate-oval. Thorax, legs and under surface, except abdomen, orange- 

 red; head, abdomen and apical half of antennte piceous; elytra green or 

 blue, with metallic lustre. Thorax nearly three times as wide as long, sides 

 feebly curved, hind angles rounded, surface finely and rather sparsely punc- 

 tate. Elytra finely striate-punctate ; intervals nearly flat, minutely punrtu- 

 late. Length 3-3..5 mm. 



Posey County; scarce. April 13. Taken from beneath bark of 

 fungus covered log. Probably throughout the southern third of 

 State. 



*2331 (7509). Arrhenoplita bicobnis Oliv., Ent, III, 1795, 55. 



Differs from the preceding in having the whole upper surface bluish- 

 green, the thorax sometimes varying to brownish ; under surface, except pro- 

 sternum, usually piceous. Elytral strite more coarsely punctate. Length 

 3—1 mm. 



Throughout the State; ^ery common on fungi of various kinds. 

 Hibernates. Febrttary 2.5-October 11. The head of female in both 

 species is wholly devoid of horns or tubercles. 



