BY THE REV. T. BLACKBURN. 
1389 
according to Capt. Broun’s quotation of Mr. Bates, distinguishes 
it), the elytra half again as -svide as the prothorax (which they are 
certainly not in C. insiilaris), and the systematic punctui*es on the 
elytral interstices placed quite differently (and very peculiarly) 
from those of C. insularis. But a further question arises whether 
A. amhiguus, Er., is the same insect as C. piinclipennis. Mad., 
and this is not so easily answered. The only tangible differences 
seem to be that the antennae are differently coloured, and the 
systematic punctures of the elytra diffei-ently placed. In A. 
amhiguus the position of the latter is described as so peculiar that 
it might well suggest the idea of abnormality. But the dark 
antennae of A. amhiguus in a genus represented by many closely 
allied species, inclines me to the opinion that the identity of 
^Ir. Macleay’s species with Erichsen’s wants confirmation, and I 
think that Mr. Masters has done wisely in retaining the two 
names, — for the present at any rate. The descriptions of the 
following new species of C ydothorax, all from South Australia, 
points to the probability that Cyclothorax is largely represented 
on the continent. 
C. OBSOLETUS, sp.nov. 
Sat convexus ; niger ; antennis, palpis, pedibusque rufis ; pro- 
thoi-ace fortiter transverso, trans basin fortiter punctulato, lateribus 
rotundatis, angulis posticis subrotundatis minute subdentifoi- 
mibus ) el^drorum disco antice subtiliter quinquies punctulato. 
substriatis, stria quinta parte dimidia posticali obliterate 
[Long. 2 1, lat. 1 line. 
The head, antennae, and palpi do not differ noticeably from those 
of C. punctipennis, Mcl. The pi'othorax is not much narrower 
than the elytra, and is nearly half again as wide as it is long 
down the middle, its base and front margin nearly equal, its sides 
very strongly rounded, the median line faint and abbreviatetl at 
both ends, the hind angles extremely obtuse but with a faint 
indication of being dentiform, the depressed basal area strongly, 
but not closely, punctured all across, a curved row of strong 
punctures running transversely a little l>ehind the front margin. 
