944 I' \MILY L. SCAI.'AH.iaiXK. 



17X0 (5010). TROX SI-BEROSUS Fab., Syst. Eut., 17!>8. :',!. 



Oblong, robust. Iu!I grayish-brown, elytra mottled with picenus, some- 

 times almost black and shining. Thorax with sides rounded, the notch in 

 front of hind angles broad and shallow, the basal tubercles as in moiim-liu*. 

 but much less elevated and therefore less distinct, the Y-shaped ones form 

 ing the median groove almost obsolete except at middle. Elytral tubercles 

 feeble or obsolete, with very small tufts of hairs between them. In tlmse 

 specimens in which the elytra! tubercles and surface coating are wholly 

 absent, the elytra are marked with rows of large rounded or subquadrate 

 punctures, and appear Mack and shining. Length 11* 17 mm. 



Throughout the State; frequent. May .'^-September 6. Often 

 attracted by electric lights of the cities. 



Tro.r pu ltd ul a* Germ., length 12-17 mm., is a southern species 

 which is recorded from near Cincinnati. 



1781 (.".OiXi. TKOX TUBER! II.ATIS DeGeer, Mem. Ins.. IV, 1778, six. 



Oblong, slightly broader behind. Black or piceous black. Head usually 

 with four small tufts of hairs in a transverse row. Thorax twice as wide 

 as long, sides feebly rounded, basal margin sinuate; disk with a wide and 

 deep median groove, bordered each side by an entire ridge, rarely inter- 

 rupted at middle by a transverse elevation. Elytra with rows of rather 

 distinct, feebly elevated tubercles, covered with brownish, suberect set* : 

 intervals with much smaller tubercles, each of which, in perfectly clem 

 specimens, is seen to be surrounded by three or four minute granules set in 

 large shallow punctures or depressions. Front tibia 1 with one small mar- 

 ginal tooth and above it subserrate. Length 9-10 mm. 



Lake, Putnam, Vigo and Posey counties ; scarce. April 30- 

 June 9. This and the next three species are of medium size and 

 have the margins of thorax ciliate with short flattened hairs. The 

 scut ell um in it and all the remaining species is oval instead of 

 spear-shaped. 



17X2 (".021). TROX ERIXACEUS Lee.. Prc.c. Phil. Acad. Nat. Sci.. VII. l,xr.4. 

 212. 



Oblong-oval, shorter than tnberciiluliifi. Dull black, shining when clean. 

 Clypeus more distinctly angulate at middle, the front with two small tufts 

 of hairs. Thorax as in ttilHT<-u]<ilitx, the median sulcus more shallow and 

 often feebly interrupted at middle. Elytral tubercles in tirst and third 

 rows more or less connected on basal half, the others rounded, clothed with 

 short, erect black hairs; intervals with smaller tubercles and small gran- 

 ules as in tiilicrciiliitiiN. Hind femora without spinules on hind margin. 

 Length G-7 nmi. 



Putnam County; rare. August 12. Taken from the skin of a 

 dead squirrel. Probably occurs throughout the southern half of 

 the State. 



