196 ~ Mr. C. J. Gahan’s notes on the 
61. Illena exilis, Krichs. ?. 
Wieg. Archiv. fur Natur., 1842, 1., p. 225. 
Two examples taken by Mr. Walker at Launceston, in 
Tasmania, agree well with a specimen which was con- 
sidered by Chevrolat to belong to the above species. But 
the characters given by Erichson do not very well apply, 
so that his species may possibly be distinct. In the 
insects before me the prothorax has, instead of a small 
tubercle, an acute but rather minute spine at the middle 
of each side; this spine does not stand straight out 
from the side, but is directed obliquely upwards, so that 
its presence might be easily overlooked; the elytra, 
instead of being sparsely punctured, are very closely 
but not strongly punctured on the deflexed sides, and 
are densely enough and somewhat seriately punctured 
above, with the punctures becoming obsolete or invisible 
on the posterior third or fourth. The first, third, and 
fourth joints of the antenne are subequal in length, the 
third being scarcely appreciably longer than either the 
first or fourth. 
If this species is the true Illena exilis of Krichson, as 
in all probability it is, Mr. Blackburn is perfectly justi- 
fied in considering the genus Neissa of Pascoe to be 
identical with ZIllena. The characters given for the 
former genus exactly fit the present species. 
ALLOMICRUS, gen. noy. 
Head rather broadly concave between the antennal tubercles ; 
front transverse ; eyes sudivided. Antenne a little longer than 
the body; first joint obconical, the third and fourth subequal in 
length, each scarcely longer than the first, the fifth to tenth 
gradually diminishing in length, the eleventh slightly longer than 
the tenth. Prothorax subcylindrical, longer than broad, strongly 
constricted at the base, furnished with a conical tubercle at the 
middle of each side. Elytra with the sides subparallel in the 
anterior two-thirds of their length, thence gradually narrowing to 
the apex; each with a feebly raised and subelongate basal tubercle, 
which is bounded on the outside by a slight depression that passes 
obliquely backwards from above the shoulder towards the sutural 
region. Legs moderately long, subequal; femora with a rather 
abrupt oval or club-like thickening towards their outer extremity, 
and a short stalk at the base; claws of tarsi divaricate; inter: 
