47 
minus fortiter impressis; prosterni margine antico late 
emarginato; segmento apicali ventrali 2-emarginato et 
3-spinoso. Long., 62 1.; lat., 23 1. 
The eyes are wider apart than in most Chrysobothres known to 
me. The prothorax is of peculiar form (the form probably that 
M. Thomson calls ‘ subhexagonalis”), approximated however 
though only feebly by one or two other species in my collection ; 
the middle part of its sides is slightly concave and at the front 
and hind apices of this middle part the outline is very distinctly 
angulated and thence proceeds obliquely to the comparatively 
narrow front and hind margins respectively, so that the segment 
is quite decidedly ‘‘ octagonal” (except in so far as its regularity 
is marred by the trisinuation of the base). Another well-marked 
character is afforded by the hind outline of the apical ventral 
segment which is widely emarginate, either side of the emargina- 
tion being produced in a strong spine, while the longitudinal 
carina that runs down the segment is produced hindward 
(dividing the emargination into two) in a third spine very little 
shorter than the lateral ones. I am unfortunately not able to 
detail the differences between this species and any other described 
Australian Chrysobothris as there is not one of those hitherto 
named that has been recognisably described. I have in my col- 
lection examples (conjecturally identified) of most of them but 
it is of no use to compare a new species with an old one unless 
one is quite certain of the latter. Limiting myself to the char- 
acters mentioned in the descriptions I may say however that the 
3-spinose apex of its abdomen distinguishes this insect from 
C. subsimilis, Thoms., and amplicollis, Thoms., and that the 
strong oblique lateral impressions of its prothorax distinguish it 
from C. Mastersi, Macl., and viridis, Macl. The other species 
are practically undescribed, although it may be noted that Mr. 
Saunders’ re-description of C. Australasiw, Hope, seems to imply 
that the apex of its abdomen is not tri-spinose; their localities 
however are such as to render extremely improbable their 
identity with this Central Australian species. The elytral coste 
of the present insect are very well defined and are placed as in 
the other Australian species ; the foveze are placed as follows,— 
one close to the middle of the base, one in front of the middle 
between the second and third cost, one behind the middle inter- 
rupting the third costa. The front femora are strongly dentate 
beneath, the intermediate tibie nearly straight. The basal two 
ventral segments are shallowly concave longitudinally. 
Lake Callabonna ; taken by Mr. Zietz. 
AGRYPNUS. 
A. Mastersi, Macl. Specimens of Agrypnus taken by Mr. 
Zietz near Lake Callabonna vary from the type prevalent in N. 
