192  Buacksurn AnD SHarp—On some New Species and Genera of Coleoptera. 
Fam. SCOLYTIDA. 
XYLEBORUS. 
Xyleborus obliquus, n. sp.—Piceus, nitidus (? antennis pedibusque testaceis) ; 
thorace anterius crebre rugoso, posterius levigato ; elytris seriatim punctatis, apice 
longius oblique declivo fere mutico. Long. 33 m.m. 
This is very similar to Xyleborus truncatus, but the truncate portion of the 
elytra is still more prolonged, and is smooth and shining, so that two or three 
of the series of punctures mark its surface in a very conspicuous manner. At 
the commencement of the truncation, close to the suture, there is a very minute 
asperity. 
Found very rarely near Honolulu; the only individual I have seen is deprived of all its limbs. 
D. 8. 
Xyleborus truncatus, n. sp.—Fusco-niger, elytris picescentibus, antennis 
pedibusque testaceis; thorace anterius crebre rugoso, posterius leevigato; elytris 
seriatim punctatis, apice truncato fere mutico, tantum tuberculis omnium minutissi- 
mus quatuor munitis. Long. 2} m.m. 
Extremely similar to the European Bostrichus saxesenii, just perceptibly broader, 
and with the elytral apex a little more truncate, and broader. The punctures of 
the elytra on the basal portion are similar to those of B. saxesenii ; but the apical 
truncation is excessively obscurely asperate, and there is a just perceptible tubercle 
close to the suture, at the commencement of the truncation, and another in a line 
with it near the apex. 
Oahu. 
D.S. 
Xyleborus rugatus, n. sp.—Nitidus; subcylindricus ; rufopiceus, antennis pedi- 
busque testaceis; setis longis minus sparsim vestitus; prothorace antice asperato, 
postice obscure rugato, grosse confuse punctato; elytris subtilius subseriatim 
punctatis, postice obscure declivibus, parte declivi asperula minuta triseriatim 
ferenti. Long. 34 m.m. 
This species is allied to X.immaturus, mihi, and X. truncatus, Sh. It differs from 
the former in being clothed with longer and more numerous setz, especially about 
the thorax, the hinder part of which is sub-opaque, with fine wrinkles, and bears 
numerous rather coarse but shallow and feeble punctures; also in having the 
punctuation of the elytra coarser, and the apical asperities of the same very minute. 
From the latter it differs in having the hinder part of the thorax less smooth, in being 
much less sparingly clothed with sete, in having the hinder portion of the elytra 
