51 
MALACODERMIDÆ. 
TRICHALUS. 
n Tr.R.S., S.A., 1894, I expressed the opinion that the genus 
T inis cannot be maintained as distinct from Metriorrhynchus. 
In Proc.L.S., N.S. W., 1898, Mr. Lea concurs with this view but 
seems to think that it is desirable to use the name as a matter of 
convenience because the distinction between the two forms is 
easily recognisable (the subsutural elytral costa in Z'richalus 
becoming obsolete at a short distance behind the base, while in 
Metriorrhynchus it is similar to the other costs). I think there 
is something to be id in favour of that N as both 
orms are very numerous in Australia, and to treat them as 
generically distinct Hee simplifies the task of identifying 
and describing them. Accepting the name Z'richalus on the 
NOS grounds, I offer the following notes. 
T. (Metriorrhynchus) semicostatus, Blackb. Trichalus oog 
regarde d as a genus this species must be referred 
T. Raymondi, Lea, must be somewhat close to it, and was tas en 
in the same region (the Australian Alps). Probably however it 
is distinct, as Raymondi is said to have the median line of the 
head distinct, the antenn of the male not reaching to the middle 
of the elytra and the rostrum tinged with red at the apex, 
whereas in semicostatus there is no distinct median line on the 
head, the antenne of the male would certainly reach back to the 
middle of the elytra and the rostrum is entirely black. If the 
two Voies should prove to refer to the same insect my name has 
the priori 
T. jo sp. nov. Niger, elytrorum apice testaceo ; rostro 
nullo; prothoracis areola discoidali lanceolata bene definita : 
bus), interstitiis biseriatim areolatis (series lineis a 
continuis separantur); antennis quam corporis dimidium sat 
longioribus, sat ee articulo 4° quam 3s pnm 
longiori. Long. 4} l; lat., 141. 
Its colouring (entis y bleak us the usage. apex of the 
elytra) inter alia distinguishes this species from ts described 
Australian congeners. The only one of them in which the pro- 
thorax is black and the elytra not entirely red is 7. discoideus, 
Er., o£ which Mr. Waterhouse mentions a form (in his opinion a 
variety) coloured like the present insect except in having the 
suture of the elytra red. The description of that species, how- 
ever, calls the prothorax “antrorsum angustatus," which would 
