126 
Psyche 
[December 
about 2 segments; 2 supra-ocular setae each side. Prothorax sub- 
cordate, c. 2/5 or slightly more wider than long at middle; base 
slightly narrower than apex; apex broadly emarginate with angles 
slightly advanced, not margined; base broadly emarginate at middle 
subtruncate at sides; sides broadly rounded through much of length, 
rather strongly sinuate basally ; posterior angles right or slightly acute, 
scarcely blunted; side margins moderate, not much broader basally, 
each with a seta about 1/3 from apex and on margin at or very near 
basal angle (additional setae rarely present anteriorly) ; disc with 
well impressed middle line and anterior transverse impression, weak 
posterior transverse impression but large irregular baso-lateral im- 
pressions; latter strongly transversely strigulose. Elytra 1/5 (dz) 
wider than prothorax, slightly narrowed anteriorly; margin forming 
c. right (slightly obtuse) dentate angles at humeri; discal striae in 
clean specimens indicated by rows of rather vague punctures; even 
discal intervals scarcely convex, odd intervals costate; no distinct 10th 
interval; each 3rd interval usually 2-punctate, behind middle and on 
declivity. Mesosternum and prosternal process not setose. Male with 
front tarsi slightly dilated, 3 segments squamulose; c? with 2 or 3, 
9 with 3 or 4 (often asymmetrical) setae each side last ventral seg- 
ment. Length 20-25 ; width 7. 8-8. 3 mm. 
Holotype cf (M. C. Z. Type No. 30,361) and 53 paratypes all 
from the Eungella Range, west of Mackay, Queensland, 2000-3000 
ft. altitude, Nov. 1957, taken by the Darlingtons, in rain forest. 
This is apparently related to T. wilsoni Cast, of South Queensland 
etc., but eungella is slightly broader and more depressed, with stronger 
elytral costae. For possible hybrids of this and following species, see 
under latter. 
Triehosternus mixtus new species 
Form about average for genus, but prothorax strongly cordate and 
elytra oval; black without metallic color, head and pronotum moder- 
ately shining, elytra duller. Head large, 4/5 width prothorax; eyes 
moderate, genae c. wide as eyes, rounded and somewhat narrowed to 
neck; antennae rather long, passing base of prothorax by about 2 or 
more segments; usually 3 supra-ocular setae each side (only 2 on 
right side in one specimen, 4 on both sides in another). Prothorax c. 
2/5 (=t=) wider than long at middle; base c. 4/5 or slightly more 
width apex; apex strongly emarginate, angles (marginal channels) 
advanced in arc of emargination ; apex not margined ; base slightly 
emarginate, finely margined; sides rounded for much of length, strong- 
ly sinuate about 1/6 of length before base, then subparallel to base; 
