[ 54 ] 
segments dull piceous :/ec/ honey-yellow ; tibim not re- 
markably spiny. 
Length one twelfth of an inch. 
The abdomen contracts very much in desiccation. 
This can hardly be the crassus Grav. as his description 
does not indicate it. 
5. T. opieus. Blackish ; feet, base of the thorax & of the 
elytra obscure reddish brown. 
Inhab. Missouri. 
Body deep black-brown, somewhat sericeous : head 
black : ardenncB at base & tip, pale reddish brown : palpi 
pale reddish brown : thorax convex ; a narrow, obscure, 
red brown posterior margin : elytra with a broad red- 
browm basal margin : feet red brown : tibm not remark- 
ably spinous ; tergum with paler margins to the segments, 
shorter than the elytra, hairy at tip. 
Length over one tenth of an inch. 
This species is not highly polished, but is distinctly seri- 
ceous. 
6. T. aeaudm^ Abbreviated ; honey yellowish ; thorax 
paler each side. 
Inhab. Indiana. 
Body honey-yellow, polished : head black-piceous ; an- 
tennoe fuscous, four basal joints obscure yellowish : palpi 
yellowish, last joint acicular : thorax honey yellowish, 
more dusky on the disk & at base ; and paler, somewhat 
translucent on the lateral margin : elytra yellow with a 
rufous tinge, a little hairy, dusky on the region of the 
scutel ; tip of the suture a little rounded so as to produce 
an acute, but small, common emargination : tergum less 
than half the length of the elytra, blackish brassy, some- 
what hairy : feet yellow, pale : tibm with obvious, but not 
very prominent spines. 
Length nearly one twelfth of an inch. 
This is very broad in proportion to its length, in conse- 
quence of the great contraction of the abdomen in drying. 
It resemhlesjocosus^ N. but is wider in proportion to its 
length, without taking into consideration the extraordinary 
brevity of the abdomen. 
