276 



FA M 1 I, Y VIII . SI LPIII 1 >JE. 



The antennae are 11 -jointed and never elongate, the terminal joint 

 being flattened and oval at tip; elytra more or less costate, but not 

 striate, the lateral margins reflexed. 



KEY TO INDIANA SPECIES OF SILPIIA. 



(/. Eyes large, prominent; form elongate; hind femora much stouter in 

 males. 539. SURINAMENSIS. 



ad. Eyes not prominent; form oval; hind femora similar in both sexes. 

 b. Labrum broadly ernarginate ; third joint of antennas as long or longer 



than the second. 



c. Thorax entirely black. 540. IN.^QUALIS. 



cc. Thorax with black disk and reddish-yellow margin. 



541. NOVEBORACENSIS. 



ftft. Labrum deeply ernarginate ; third joint of antennae shorter than sec- 

 ond ; form broadly oval. 542. AMERICANA. 







*539 (1704). SILPHA SI-RINAMENSIS Fab., Syst. Ent.. 1798. 72. 



Moderately elongate, depressed. Black or piceous ; elytra with narrow 

 subapical orange red cross-bar, often broken into spots, sometimes entirely 

 wanting. Thorax transversely oval, broadly flattened behind. Elytra gradu- 

 ally broader behind, apex obliquely truncate; disk flat with three distinct 

 cos tie. Length 15-24 mm. 



Throughout the State ; frequent. Hibernates as imago beneath 

 logs close to carrion. January 19-December 18. 



*540 (1708). SILPHA IN^QUALIS Fab.. Spec. Ins., I, 1781, 87. 



Oval, slightly oblong, depressed. 

 Black, opaque. Thorax twice as 

 wide as long, narrowed in front. 

 base with a broad truncate lobe 

 at middle; elytra very little long- 

 er than wide, rounded at apex. 

 the disk with three cos tie, the 

 outer and most distinct shorter 

 and terminating in a slight tuber- 

 cle one-third from apex. Length 



Fig. 136. a, larva; </, same, natural size; /, g, h, mandible, 10-14 mm (Fi 01 136) 

 labium and maxilla of larva; i, j. anal process and antenirr of 



same; m, one of the literal processes more highly magnified; rn, !,,, 4- + !-, Q+o-f-^ 



6, pupa; c, same, intiiril size; I, anal process of same; c, i HlOUgllOUT 1116 Oiaie ; CO111- 



, , 



beetle; fc, front tatsus of same. (After Riley.) 



TTM j-m, 



inr.n. Hibernates in different 



; gregarious. January 16-November 4. 



