1410 FURTHER NOTES ON AUSTRALIAN COLEOPTERA, 
tibiis anticis exteme fortiter acute tridentatis ; segmento ventrali 
apicali apice sat fortiter arcuatim emarginato 3 mento leviter 
convexo in medio leviter concave. 
[Long. 11, lat. 6 lines (vix). 
• 9 latet. 
The absence of a frontal horn in the male at once distinguishes 
this species. The clypeus is shaped as in the females of the 
preceding three species, having its hinder margin formed of two 
oblique lines meeting in the middle in a sharp angle, the whole of 
this hind margin being laid back (as it were) on the surface of the 
hinder part of the head and being a little turned up to form the 
clypeal suture ; it is however more elevated (especially in the 
middle) than in any female known to me. The sulcus behind the 
anterior margin of the prothorax resembles that in the female of 
D. affinis, but is produced backward much more strongly in the 
middle, running down within the frontal impression on either side 
to its base (very little in front of the middle of the segment), 
where the two sides meet in a sharp angle. The prothorax is 
about a third again as wide as its length down the middle ; the 
whole segment, however, being smaller in proportion to the elytra 
than in any of the preceding species. 
There is a single specimen in the South Australian Museum. 
D. Masters:, Mad. 
I have not seen a specimen of this insect, which is evidently 
very distinct from all its described congeners through the retuse 
portion of the prothorax in the male having a lateral protuber- 
ance on either side. 
The above species appear to be perfectly distinct and separated 
by reliable characters. I have specimens before me which I 
believe to represent several other species, but they are closely 
allied to one or other of the preceding, and I am not sure without 
examining more specimens that their distinctive characters can be 
relied on. I find that in Dasygnathm, as in many other genera 
