56 
Psyche 
[June 
Lake Violet but a few from “Yandil”, Sept. 28-Oct. 3, 1931 ; 
from banks of ponds and water holes. 
This new species is closely related probably only to 
Clivina obsoleta SI. of Cape York (see Sloane’s key, 1896, 
p. 162). The most important difference is probably in the 
form of the anterior angles of the prothorax. The prothorax 
is described as slightly narrowed anteriorly in obsoleta, with 
anterior margin truncate and anterior angles obtuse ; while 
in diluta the prothorax is parallel, with anterior margin 
slighly emarginate and anterior angles somewhat acute 
except that, as usual in this genus, they are slightly blunted. 
Moreover, the head is probably much more closely punctate 
in diluta than in obsoleta, the front of the clypeus is emarg- 
inate at middle (described as truncate in obsoleta), and the 
description of obsoleta suggests other slight differences. I 
have not seen specimens of obsoleta. I believe that diluta is 
distinct from it, but the former may prove to be only a well- 
defined western subspecies of it rather than a separate 
species. The present new species, diluta, resembles C. 
frenchi SI. (as obsoleta too is said to do) but is smaller, 
with a (short) subhumeral carina, relatively longer pro- 
thorax, and clypeus much more deeply emarginate at middle. 
These differences are not sexual, for dissection shows that 
I have both sexes of both species. 
Clivina wiluna n. sp. 
Parallel, cylindrical, head not unusually large ; brown, 
darker (sometimes blackish) anteriorly. Head about 4/5 
width prothorax; mandibles short; clypeus with middle part 
separated from wings, angles advanced and dentiform, 
clypeal wings angulate or sub-angulate externally, nearly as 
prominent as angles of median part, separated by distinct 
notches from supra-antennal plates ; latter with outer angles 
somewhat variable in form but usually less (never more) 
prominent than angles of clypeal wings; eyes prominent, 
much more so than supra-antennal plates ; front not 
distinctly separated from clypeus, more or less (variably) 
impressed at middle, frontal sulci recurved, front sparsely 
or not distinctly punctate, except punctation sometimes 
more distinct at middle. Prothorax slightly (1/20 or 1/10) 
