1953] 
Darlington — Australian Carabidae 
57 
longer than wide, slightly but distinctly narrowed ant- 
eriorly; anterior margin approximately truncate; posterior 
angles broadly rounded, anterior ones right or slightly 
obtuse, blunted; disc with middle line distinct, anterior 
transverse impression obsolete or nearly so, sub-basal lateral 
impression short and vague; surface of disc smooth except 
for a few transverse strioles. Elytra only 1/10 or 1/20 
wider than prothorax, parallel, truncate at base; 4 inner 
striae free at base, 5th united with 6th; sub-humeral carina 
short, indistinct; striae entire except some very briefly 
obsolete at extreme apex, punctulate ; intervals slightly 
convex, 3rd with usual 4 distinct setigerous punctures on 
outer edge. Prosternal process very narrow (attenuate) 
between anterior parts of coxae; prosternal episterna dull; 
body impunctate below. Anterior femora stout, lobed below; 
anterior tibiae 4-dentate externally, the upper tooth much 
shorter than the others but distinct and acute; upper in- 
ternal spine of front tibia somewhat curved and thickened; 
middle tibia with spur about 1/3 from apex externally. 
Length 5. 7-6. 4; width about 1.6 mm. 
Holotype (M. C. Z. Type No. 23,092) and 14 paratypes 
from Wiluna and vicinity. Western Australia, most at 
'‘Yandil” but 1 from Lake Violet, Sept. 28-Oct. 3, 1931 ; 
from the banks of ponds and water holes. 
Apparently closely related only to Clivina cylindriformis 
SI. from the Gulf of Carpentaria (see Sloane’s key, 1896, 
p. 162). The most important differences are that the front 
femur of iviluna is 4-dentate externally (described as 3- 
dentate in cylindriformis) and that in iviluna the clypeal 
wings are angulate and at least as prominent as and usually 
more prominent than the angles of the supra-aiitennal plates 
(clypeal wings described as rounded and apparently much 
less prominent than the angles of the supra-antennal plates 
in cylindriformis) . As compared with the description of 
cylindriformis, wiluna evidently also has the median part 
of the clypeus with more prominent angles, the front much 
less punctate, and the color paler; and the prosternum is 
usually not sulcate across the base in iviluna, although 
this is not a trustworthy character. I have not seen speci- 
mens of cylindriformis. From C. obsoleta SI., to which 
