( 400 ) 
giora, lateribus omnino rectis, posterius non attenuato-rotundatis, 
sed exacte parallelis a basi usque apicem, margine apicali ipso 
fortiter rotundato; supra vix profundius punctato-striata, quam 
in monographo, interstitio tamen quarto in utroque elytro ad 
apicem versus dilatato, post medium non uniseriatim (ut in 
illo) sed subbiseriatim vel multipunetato. Declivitas apicalis 
distincte magis determinate truncata, truncaturae spatio fere 
exacte circulari, planiore, ambitu acutiore. Ceterum, ut mihi 
videtur, in omnibus notis priori aequalis. 
Patria : America borealis (Civitates unitae). Habitat, auctore 
Leconteo, sub cortice quercus. Equidem eum etiam lignum ipsum 
penitus perforare conjectare velim. 
A dnotatio. — Xyleborus biographus Lecont. verosimile marem 
nostri insecti repraesentat, quare diagnosem auctoris loc. cit. 
datam reproducere necesse videtur. 
« X. biographus. — Cylindrical, not very slender, chestnut- 
brown, antennae and feet paler, shining, thinly clothed with very 
long hairs; head sparsely punctured , prothorax (*) longer than 
wide, broadly and deeply excavated before the middle, and cove- 
red with flat granules, producing an imbricated appearance, ante- 
rior margin obtusely angulated; the surface at the sides is spar- 
sely punctured, and near the middle of the base, is almost smooth; 
elytra less than twice as long as the prothorax, with rows of large 
feebly impressed punctures, posterior declivity flat, Impunctured, 
with three acute tubereles each side equally distant from the suture 
and the margin of the declivity, which is marked with a second 
row of three or four smaller teeth, and outside of these again are 
two or three scarcely perceptible denticles. 
Long. 3 mm. 
One male from Illinois. » 
