Coleoptera from the Hawaiian Islands. 517 
ANOBIIDA. 
Of this family Mr. Blackburn has discovered about 
thirteen new species, and these I have been obliged to 
refer to three new genera, Cwlosternus, Xyletobius, and 
Holcobius. Of these three genera, one—Calosternus— 
belongs to the Dorcatomini, the most specialised of the 
groups of the Anobiide ; and as Celosternus is the most 
evoluted of all the forms of Dorcatomini hitherto de- 
scribed, it marks as yet the extreme point of specialisa- 
tion attained by the Anobiide. The other two genera, 
Xyletobius and Holecobius, are widely different from 
Ceelosternus, and are rather closely allied inter se; they 
belong to the Xyletinini, a group not sharply divided 
from the Anobiini, and which may be considered as the 
central one of the Anobiini, for it wants the extreme 
modifications of the antenne of Anobiini and of Dorca- 
tomini, and the highly peculiar sternal developments of 
the latter group, and is distinguished from them only by 
these negative characters. The two Hawaiian genera of 
Xyletinini will prove to be, as regards the Anobiint and 
Xyletini, very synthetic, and they thus form a very 
striking contrast to the extremely specialised Calosternus. 
And I anticipate these two genera will prove to be the 
real autochthones (adopting a term of the regretted 
Wollaston’s) of the Hawaiian Anobiide, and that other 
allied species will be discovered. 
XYLETOBIUS, N. g. 
Xyletobius marmoratus, N. 8. 
Angustulus, dense subtilissime tomentosus, rufo-fuscus, 
pubescentia cinereo-variegata, antennarum basi, femori- 
busque testaceis ; elytris subtiliter striatis, strus plus 
minusve sinuatis. Long. 34 mm. 
Of rather narrow, moderately elongate, form; with 
elongate slender antennz, which moreover are but feebly 
serrate internally ; the 1st and 2nd joints of these mem- 
bers are yellow, the 4th to 11th infuscate, from the 3rd to 
the 10th each joint is a little longer and more slender 
than its predecessor, the 11th is slender and distinctly 
longer than the 10th. The head is fuscous, quite dull, 
covered with obscure tomentum, and with no visible 
sculpture. The thorax is strongly transverse, but little 
