120 
Psyche 
[December 
This new species is sufficiently distinguished from others in the 
preceding key. It is not closely related to any other known species. 
It may prove to be generically distinct from Trichostemus, or it may 
be a relict of the ancestral stock of the genus. 
Trichostemus obscuripennis (Macl.) 
This is the northernmost Trichostemus , and it descends to rela- 
tively low altitudes. Macleay (1887, p. 220) described it from the 
Mossman River. Sloane had it from Helenvale south of Cooktown. 
I have it from Mt. Finnigan south of Cooktown, Thornton Peak 
near Daintree, Mt. Lewis near Mossman, and Black Mt. about 20 
miles north of Kuranda. Although most of my specimens were taken 
at 2000 or 3000 ft. altitude, several were found at or below 1000 ft. 
in strips of rain forest along the trail between Thornton Peak and 
the Daintree River. 
T. obscuripennis is a very distinct species but hardly a separate 
subgenus. Its lack of humeral teeth is approached in T. kirrama, and 
lack of dorsal elytral punctures is matched by fax, although neither 
of these species is close to obscuripennis in other ways. 
Trichostemus montorum new species 
Form as figured (Fig. 2), rather broad, depressed; black with 
bluish, purplish, or sometimes greenish reflections, head and pronotal 
disc moderately shining, elytra a little duller. Head about 4/5 width 
prothorax ; eyes rather small, genae as wide or wider than eyes, irreg- 
ularly arcuate and somewhat narrowed to neck; antennae rather long 
(in genus); 2 supra-ocular setae each side. Prothorax cordate; 1/3 
(z±=) wider than long at middle; base slightly (zb 1/10) narrower 
than apex; sides rounded for about 3/4 of length, then rather strong- 
ly sinuate before c . right, scarcely blunted posterior angles; side mar- 
gins moderate, not much wider basally, each with a seta about 1/3 
from apex and on margin at basal angle; apex not margined, broadly 
emarginate but angles not otherwise advanced ; base broadly emar- 
ginate at middle, slightly rounded toward sides, vaguely margined at 
sides but not at middle ; disc depressed, middle line deep, transverse 
impressions weak; baso-lateral foveae elongate but not strictly linear, 
slightly nearer margins than middle, not quite reaching middle of 
length, densely transversely rugulose, the rugulose areas meeting at 
middle posteriorly, with middle of base longitudinally rugulose; disc 
otherwise impunctate. Elytra oval, usually slightly narrowed anteri- 
orly; margin somewhat obtusely angulate and finely toothed at hu- 
meri ; elytra with finely punctate discal striae ; intervals more or less 
convex, 3, 5, 7 increasingly elevated, 7th being sharply carinate for 
