(504 ) 
rows of fine punctures, connected by feeble transverse rugosities, 
pubescence fine and short; posterior declivity convex, sutural 
angle prolonged into a short acute point. 
Long. 2,5 mm. 
Illinois ; four specimens sent me by D' Henry Shimer, as found 
on the prickly ash, into the wood of wich it bores. This species 
differs from the next by its more slender form, finer pubescence, 
and less course elytral punctures. 
5. M. ACULEATUS, Leconte. 
Slender, cylindrical, dark-brown, not shining, elytra and front 
part of thorax paler, antennae yellow, scape triangular, fringed 
with long yellow coarse hairs, head flat, thinly fringed with long 
hairs; prothorax a little longer than wide, gradually narrowed 
and rounded on the sides from the base, wich is feebly rounded, 
surface coarsely granulate, the granules becoming more acute 
in front of the middle; elytra with transverse punctures densely 
arranged in rows, and almost connected by intervening rugosi- 
ties, intervals narrow, with the hairs arranged in lines, appearing 
like short bristles, posterior declivity slightly convex, not at all 
excavated or toothed, sutural angle prolonged into a short acute 
point. 
Long. 2,5 mm. 
Southern Staates. Resembles in form the European T. micro- 
graphus, but differs generically by the structure of the antennal 
club. The scape of the antennae is less broadly dilated than in 
the preceding species. 
