524 Mr. D&@harp on some new 
The antenne in the two individuals before me have 
the joints of the club similar in form, but in one of 
them—no doubt the male—they are larger, being both 
broader and longer, than in the other. Metasternum 
without carina. 
Mr. Blackburn discovered this species at an elevation 
of between 2000 and 4500 feet, on Mauna Kea, and 
Mauna Loa, Hawaii, by beating dry branches of trees. 
(No. 266). 
Mirosternus carinatus, n. 8. 
Niger, parum nitidus, obsolete punctatus, tenuiter 
pubescens, antennarum basi pedibusque rufo-obscuris, 
tarsis dilutioribus ; metasternum in medio anterius alte 
carinatum. Long. 25 mm. 
This species is distinguished essentially by the acutely 
carinate metasternum ; it much resembles C. punctatus, 
but the puncturation of the elytra is much less ; this is 
fine throughout, and is even scanty and obsolete, except 
at the extreme base and at the apex, at both of which 
spots it is denser than elsewhere. The joints of the 
antennal club are very largely developed, and are similar 
in shape to those of C. punctatus, except that they are 
not quite so long in proportion to their breadth. 
Beaten from dead branches of the Koa tree on Halea- 
kala, Maui, at an elevation of 4000 or 5000 feet, April, 
May, 1880. (No. 403). 
Mirosternus glabripennis, n. 8. 
Piceus, elytris nigricantibus, antennis pedibusque rufis, 
tarsis dilutioribus ; capite thoraceque conspicue pube- 
scentibus sed vix punctatis; elytris glabriusculis, per- 
nitidis ; metasterno posterius in medio argute canali- 
culato, antennis carina elongata, parum elevata. Long. 
24 mm. 
This species is readily distinguished by the shining 
and polished elytra, forming a striking contrast to the 
conspicuously pubescent thorax. The club of the an- 
tenne is rather more than moderately developed. 
Although the elytra are very polished, they have, along 
the suture at the apex, a very fine and scanty pale 
pubescence. The metasternum is not deeply hollowed 
along the middle, but has behind a very distinct channel, 
