BLACKBURN AND SHarP—On some New Species and Genera of Coleoptera. 185 
elytris prothorace evidenter latioribus, haud striatis, obscure subtilius seriatim 
punctatis, interstitiis parce subtiliter punctatis; subtus abdominis parte anteriore 
subtiliter punctata. Long. 31-32 m.m. 
This species is somewhat closely allied to the preceding, which it resembles in 
regularity of outline; but I am obliged to treat it as distinct, on account of the 
thickness of its antennz and the relative length of the first two joints of the 
funiculus, together with the delicacy of the punctures which form rows on the 
elytra. . 
A few specimens occurred on Lanai, but the exact particulars of the capture escaped record. 
TBs 
The inspection of recent captures in Oodemas has brought me to the conclusion 
that I was misled into regarding O. substrictum, mihi (E. M. M., vol. xvii., p. 200) 
as a distinct species by the occurrence of a certain amount of apparent variation 
in the relative length of the first and second joints in the funiculus of the antennz 
of O. obscurum, mihi. I have now satisfied myself that this distinction cannot 
be maintained, the first joint in all my specimens of O. substrictum (so-called) being 
at any rate decidedly shorter than the second. The other differences mentioned 
in my description signify no more, I think, than that the insect varies somewhat 
in size and intensity of sculpture. The insect should stand therefore as follows :— 
O. obscurum, Bln. 
var. O. substrictum, Bln. 
In my earlier descriptions of Oodemas I appear to have passed over, without 
sufficient notice, some characters that have since acquired a more evident 
importance through the discovery of additional allied species; and as, moreover, 
the descriptions appeared in various publications and at various times, I think it 
will be well here to pass briefly in review the distinguishing characters of the 
species described up to the present time :— 
1. First joimt of funiculus of antennz much shorter than the second, .. eee 
First joint of funiculus of antennz not differing much from the second in 
length, . ; ‘ F : : ; : i : i OE 
First joint of funiculus of antennz much longer than the second (a rather 
large species, oval in form, not very shining, its elytra absolutely with- 
out striation, but bearing rows of large punctures), . c ; . O. mauiense. 
* Tn O. obscurum the comparative elongation of the second joint is less marked than in the other 
species of this group. 
+ In O. olinde the second joint is a little longer than the first, but the unusual elongation of the 
first jot seems to bar the species from being placed among those in which the first jomt is very short. 
2C2 
