(525) 
masculini generis inveni. Mares cum feminis jam tempore autu- 
mnali vel primo vere in suleis vetustis a matre factis, in quibus 
ipsi nati sunt, Coitum faciunt nec ex nidis in apertum proveniunt, 
sed in his moriuntur. | 
Var. b. Thorace paullo breviore, elytris profundius punctato-stria- 
lis ex Bohemia et ex Caucaso nata. 
A dnotatio. —— Ex intuitu speciminorum typicorum persuasum 
habeo, Bostrichum tachygraphum, Sahlb., congruum esse cum 
nostro Xyleboro dispare, Fabr. (©). 
Bostrichum Ratzeburgïi, Kolen., etiam ab eo non diversum 
aestimare velim; descriptio auctoris certe insecto apte corre- 
spondet. 
Maxime propinquum, nisi forte congruum, Xyleborum pyri, 
Zimm. (Synops. Scol., p. 144; Scolyt. pyri, Peck, Mass. Agr. 
Journ., 1817), crederem, si non auctor illo insecto ut et propin- 
quis illius X. tachygrapho, Zimm. (ibid., p. 144) et obeso, Lec. 
(ibid., p. 159), funiculum antennarum modo 4-articulatum ad- 
seripserit. Diagnoses auctorum hoc loco afferam. 
« X. tachygraphus, Zimm. — Brown, antennae and feet ferru- 
ginous yellow; prothorax not longer than wide, roughly tubereu- 
late, more-coarsely in front than behind, thinly pubescent; elytra 
short cylindrical, behind obtusely rounded, punctate-striate, the 
intervals also punctured, with fine rows of hairs, and behind 
also with small elevated teeth. 
Long. 1 :}, lin. (5 mm.). 
North Carolina. (This species is also found in Pennsylvania. 
EE Lec.) » 
« X. pyri. — Scolytus pyri (Peck, Mass. Agr. Journal, 1817). 
— Of the same size and form as X. tachygraphus, but of a shi- 
ning black color, with the antennae, tibiae and tarsi ferruginous 
yellow; prothorax covered in front with sharp tubercles arranged 
in transverse rows, behind nearly smooth; the whole surface 
is thinly elothed with fine white hairs; elytra punctate-striate, 
