Sie Mr. G. C. Champion ow the Tenebrionidx 
and more scattered than those on the prothorax ; legs short, the 
tibia slender. 9. Head unarmed, with the interocular space less 
shining and somewhat thickly punctured, the transverse groove 
behind the epistoma apparently deeper ; the prothorax narrower, 
less convex, less rounded at the sides, more parallel behind. 
Length 2—2! mm. 
Hab. N.W. Australia—Port Darwin, Adelaide River. 
Numerous examples. This very small species ap- 
proaches the European [phicorynus chrysomeloides, Rossi 
(melanophthalmus, Muls.), but it is best placed in 
Arrhenoplita. It resembles a Cis. The tenth and 
eleventh joints of the antennz are so closely articulated 
as to appear subconnate. Found in dry fungus on old 
posts in company with A. exilis (Walker). 
Arrhenoplita exilis, n. sp. 
d. Oblong, very convex, castaneous, shining, glabrous. Head 
very shining, smooth and depressed between the eyes, and armed 
on either side between them with a long, erect, straight horn, the 
epistoma rather large and limited posteriorly by a shallow groove, 
the anterior margin sharply, triangularly raised on either side in 
front ; the eyes large, coarsely granulated, almost entire ; antenn 
nearly reaching the base of the prothorax, joints 3—6 slender, 3 
much longer than 4, 4—6 short, 7—11 perfoliate, widened, and form- 
ing an elongate gradually widening club, 7—10 transverse, 8—10 
strongly so and much wider than 7, 11 twice as Jong as 10, constricted 
at the middle, and truncate at the apex; prothorax transversely 
convex, nearly twice as broad as long, rounded at the sides, very 
finely, densely punctate ; elytra about two and a half times longer 
than the prothorax, closely, confusedly, very finely punctured. 
?. Head unarmed, densely, minutely punctured, with the trans- 
verse groove behind the epistoma deep ; the prothorax less convex 
and more parallel. Length 2} mm. 
Hab. N. W. Australia—Port Darwin. 
One pair. This species resembles A. pygmexa, but it is 
a little larger and more finely punctured, and destitute of 
pubescence. The antennz are more elongate, and have 
their apical joint fully as wide, and twice as long, as the 
tenth; in A. pygmexa the apical joint is extremely short 
and much narrower than the tenth. At first sight, the 
antennee appear to be 12-jointed, the apical joint being 
constricted at the middle and shaped like the united 
apical two joints in A. pygmea. 
