81 
but noticeably shorter than second. Prothorar as long or 
almost as long as wide, subcylindrical, widest at one-third 
from apex; densely and rather strongly punctate, the punc- 
tures irregularly concealed by the clothing. Scutellum small 
and distinct. #lytra much wider than prothorax, shoulders 
slightly rounded, sides subparallel towards apex; striate- 
punctate, punctures large, suboblong, close together, mode- 
rately distinct through clothing; suture, third and fifth in- 
terstices raised about summit of posterior declivity. An- 
terior сох separated ; anterior tibiæ longer than the others 
(which are almost straight), and strongly arcuate ; claws sepa- 
rated only at apex. Length, 3 mm. 
Hab.—N.Q.: Barron Falls (A. Koebele). 
To the naked eye each elytron frequently appears to be 
supplied with two elongate white spots: one before and one 
behind the middle, sometimes only the posterior ones can be 
noticed. These spots are on the third (partly on the second) 
interstice, and become indistinct under a lens. Of thirteen 
specimens under examination I cannot find the least struc- 
tural difference, but some which are more brightly clothed and 
with more distinct marks are probably the males. The scrobe 
when seen from the side looks somewhat like the letter T and 
completely isolates a squamose portion of the sides of the ros- 
trum towards the apex. I have not considered it necessary 
to generically separate it, from nana and the preceding, on 
account of its falcate anterior tibiæ. 
RHADINOSOMUS LACORDAIREI, Pasc. 
This species (a beautiful figure of which has been given * 
by Mr. Waterhouse, from a specimen collected by Mr. Dar- 
win near Sydney) is very variable in regard to colour, size, 
and the acuminated portion of the elytra (also sexually vari- 
able). RF. impressus is but a feeble and not at all constant 
geographical variety; I have specimens from Swan River, 
W.A., and Tamworth, N.S.W., in which not the slightest 
difference can be found. Іп appearance 2. Tasmanicus is 
very distinct, but I believe it to be a variety only. Of R. 
frater Mr. Blackburn says: —“This species is distinguished 
from all the previously described Australian Rhadinosomi by 
its head gradually narrowed from the eyes hindward." This 
is characteristic of the male of A. Lacordairei, judging by 
numerous specimens taken in copula. I have a variety from 
Mounts Kosciusko and Wellington, in which the colour is 
much paler than usual and which has the elytra unusually 
dilated in the female; its head also is rather densely clothed 
with black sete. ` 
Е 
