C 53 ] 
/ 
the segments piceous on the hind margins ; bemath hl^ok- 
piceous : feet honey yellow. 
Length over three "twentieths of an inch. 
2. T. Piceous, sericeous: thorax & elytra margin- 
ed with dull yellowish obscure, 
Inhab. U. States. 
Body^ blackish piceoFs, somewhat sericeous : mouth 4" 
antennae dull yellowish ; die latter pale brownish towards 
the middle : penuriimate joint thick ; last joint much 
shorter & aciciilar : thorax dilated, convex, lateral & basal 
margins dull yellowish : elytra^ basal & exterior margins 
dull yellowish : abdomen somewhat hairy at tip: beneath 
honey yellow : feet not or hardly spiny. 
Length less than three twentieths of an inch. 
The paler margins of the thorax & elytra are sometimes 
almost obsolete. 
3. T. jocosus, Black ; thorax, elytra, feet & mouth yeh 
lowish. 
Inhab. Indiana. 
Head black -piceous, polished, convex, impunctured : an- 
tennae honey-yellow (six ultimate joints wanting in the 
specimen) palpi honey-yellow, terminal joint acicular: 
thorax polished, impunct ired, yellowish ; anterior & pos- 
terior margins blackish ; scutei blackish : elytra yellow- 
ish, with very fine, ]}rostrate hairs ; region of the scutei bla- 
ckish : ter gum. posterior margins of the segments yellow- 
ish ; longer than the elytra, (in the preserved state :) /ee# pale 
yellow. 
Length one tenth oi an inch. 
4. T. ventrimlus^ Black , thorax each side & elytral 
margin piceous. 
Irihab. Pennsylvania. 
Body black, with a slight piceous tinge, polished ; an« 
iennce dull yellowish, dusky towards the tip : mouth dull 
yellowish : palpi filiform : thorax piceous on the lateral 
margin, gradually shad* g to the general blackish colour : 
elytra on the lateral margin & at tip piceous ; common 
edge of the tip not indented at the suture : ter gum (in the 
preserved state,) much shorter than the elytra ^ at tip of the 
