30 
‘Compared with the European JZ. navale, Linn., the present 
species is very differently coloured, with more serrate antenna, 
evidently stronger puncturation throughout, a much more 
elongate prothorax, which is strongly canaliculate, &c. I may say 
that I am confident in my identification of Z. australe, Er., as I 
took my specimens in Erickson’s locality, and they agree per- 
fectly with the description. 
Adelaide district; in the S.A. Museum (taken by Mr. 
Jennings). 
TENEBRIONID. 
HELEUS. 
The number of species of Heleus known to inhabit Australia 
is now large, and the descriptions are very scattered. In 1887 
Sir W. Macleay published in the Proc. L.S., N.S.W., a synopsis 
of the species then known, but he did not attempt to place their 
distinctive characters in tabular form further than by dividing 
them into four groups based upon the nature of the elytral 
sculpture. I have recently been studying the Helgi appertain- 
ing to the first of Sir W. Macleay’s groups, and believe that I 
have before me all (except perhaps one doubtfully distinct 
species) described up to the present time. As they are closely 
allied inter se and some of them are very insufficiently described 
it will be well to furnish a tabulation of them. I take the oppor- 
tunity to describe two new species and to furnish some notes 
on several of the older ones. 
Sir W. Macleay’s ‘first group” of Heleus is distinguished 
from the other groups by its species having elytra devoid of 
pilosity and not furnished with either tubercles or continuous 
coste. As some of the species have numerous granulés on the 
elytra it may perhaps appear that the distinction between those 
and ‘‘ tubercles” is rather fine ; as a fact, however, the difference 
between the granules and tubercles in respect of size is extremely 
strong, and there are other distinctions between the group con- 
taining species with granulated elytra and that whose species 
have tuberculate elytra which render them very easy to dis- 
tinguish. Of the former group the smallest specimen I have seen 
is long., 101. (most of the species are much larger still) ; of the 
latter the largest size attributed to any species is long., 741. 
Also, in the former group the projecting front processes of the 
prothorax (with the exception of one very large species somewhat 
intermediate between the first group and the group having costze 
on the elytra) are extremely broad and blunt, while in the latter 
group these processes are very much narrower. 
Several of the Helgi of Sir W. Macleay’s “first group” are 
insufficiently described by their original authors. One of these 
(H. prineeps, Hope) has been redescribed by Sir W. Macleay, 
