BLACKBURN AND SHARP—On some New Species and Genera of Coleoptera. 159 
fifth joints are subequal, the former of them is, however, slightly longer than either 
of the other two, each of which is quite as broad as long. Thorax very short and 
broad, not produced in the middle in front, slightly broader in front than behind, 
the sides explanate. 
Although I have seen only a single example of this species as well as of X. 
oculatus, I believe the two are distinct though very similar. X. affinis is rather 
broader, and has the antennz a little shorter, and the fourth and fifth joints are 
shorter instead of longer than the third, and the thorax is less depressed at the 
sides. 
Found at an elevation of about 6000 feet on Mauna Loa, Hawaii. 
DAS: 
Xyletobius serricornis, n. sp.—Angustus, dense subtilissime tomentosus, rufus, 
irregulariter infuscatus, pubescentia cinerea variegatus ; palpis pedibusque et 
antennarum articulis 1-3 lete testaceis; antennarum articulis 4-11 nigris his 
(articulo ultimo excepto) transversis. Long. 24 m.m. 
This species bears a general resemblance to X. marmoratus, Sh., X. lineatus, Sh., 
and X. insignis, mihi, but can easily be distinguished from them all by the shortness 
of its antennee, which are less than half as long as the body, and of which joints 
four to ten are decidedly transverse and rather strongly serrated internally. 
A single specimen was obtained by beating dead branches of trees, at an elevation of about 2000 
feet, on a mountain on Lanai. 
I have a single specimen of Xyletobius, from Hawaii, which I refer to 
X. oculatus, although it differs from the type in having the legs reddish and the 
base of the antennze testaceous. 
Tee 
Xyletobius lineatus, n. sp.—Niger, pube variegata vestitus, antennarum basi 
pedibusque testaceis, elytris nigro-sanguineis ; antennis tenuibus, parum elongatis, 
intus leviter serratis. Long. 21 m.m. 
Antennz reaching but little farther back than the base of the thorax, slender ; 
of joints five to ten each is slightly longer than its predecessor, but no one of them 
is elongate. Thorax very convex transversely in front, and with the front angles 
deflexed and hidden, clothed irregularly with a pale flavescent pubescence, which 
is absent altogether from the middle. Elytra finely striated, of a black colour 
tinged with red, the red being more distinct in places, so that they appear a little 
variegate, and thisf appearance of variegation is increased by some lines and 
patches of pale pubescence. Legs, clear yellow. 
This distinct species may be ;placed in front of X. marmoratus as the first species of the genus, its 
antenne showing a less remarkable development than do the others. It was found by beating dead 
branches of trees, at an elevation of about 6000 feet, on Mauna Loa, Hawaii. 
D. 5. 
TRANS. ROY. DUB. SOO,., N.S. VOL. Ill. Z 
