1961] 
Darlington — Australian Carabid Beetles 
127 
posterior angles right or slightly acute, scarcely blunted ; side margins 
moderate anteriorly, slightly wider posteriorly, each with 4 to 9 setae 
near and before middle (at least 4 on each side in all specimens) and 
1 seta posteriorly well before angle; disc with usual middle line, weak 
transverse impressions, and rather weak baso-lateral foveae separated 
from base by transverse elevation ; foveae strongly transversely strigu- 
lose, and base longitudinally strigulose. Elytra c. 1/4 wider than pro- 
thorax; margin forming c. right or slightly obtuse, dentate angles at 
humeri; striae in form of lines of small punctures (often obscured) ; 
even intervals scarcely elevated but intervals 3, 5, and 7 carinate, 
carinae of 3 and 5 not reaching base but 7th very strongly carinate 
basally; no 10th interval; each 3rd interval 2-punctate posteriorly. 
Mesosternum without but prosternal process with setae (all specimens 
— most setae broken off in 2 specimens but vestiges visible). Male 
front tarsi moderately dilated, 3 segments squamulose ; c? with usually 
2 or 3, sometimes 4 (often asymmetrical), $ with usually 4, some- 
times 5 setae each side last ventral segment. Length 24-29; width 
8. 4-9. 5 mm. 
Holotype cf (M. C. Z. Type No. 30,362) and 23 paratypes all 
from Eungella Range, west of Mackay, Queensland, 2000-3000 ft., 
Nov. 1957, taken by the Darlingtons, in rain forest. 
Superficially, mixtus is almost a miniature of cordatus but has extra 
supra-ocular setae, posterior pronotal setae farther from base, and a 
setose prosternal process. From eungella, with which it occurs, mixtus 
differs in form, extra supra-ocular and lateral prothoracic setae, posi- 
tion of posterior pronotal setae, and setose prosternal process. Most 
individuals of both species are unquestionably distinct. However, I 
have 5 specimens from the Eungella Range that have intermediate 
characters and that may be hybrids. They are intermediate in form ; 
like eungella in having only 2 pairs of supra-ocular setae; intermediate 
in lateral pronotal setae (2 or 3 each side at and before middle, but 
with posterior setae near base) ; and like eungella in having prosternal 
process not setose. Only field study can determine the real status ^ 
these specimens. 
Trichosternus cordatus Chd. 
Although cordatus is primarily a South Queensland species, it ex- 
tends into the tropics. It lives in drier woodland than most other 
members of the genus except superbus Cast. I found it at Beechmont 
(Queensland-New South Wales border) ; Benarkin ; Yarraman; Big- 
genden (SW of) ; near Monto (in dry scrubby woods with Pamborus 
