1953] 
Darlington — Australian Carabiclae 
95 
convex, with usual middle line and transverse impressions; 
base and apex margined at sides but not at middle. Elytra 
subparallel, only slightly narrowed anteriorly, rather long 
(in genus), only about 1/5 or less wider than prothorax 
(appearing scarcely wider) ; basal margin entire, strongly 
(almost rectangularly) angulate at humeri but not distinct- 
ly dentate ; sides almost straight, then increasingly arcuate, 
without distinct subapical sinuations, to right or slightly 
obtuse sutural angles; striae well impressed, punctate; in- 
tervals all rather strongly and almost equally convex, 3rd 
with single setigerous puncture very near apex, 5th with 
2 punctures, set respectively well forward (about as far 
from base as from suture) and well back (punctures some- 
what variable in position and single punctures sometimes 
absent). Prosternal declivity and apex of mesosternum 
setose; last ventral segment 4-setose (2 setae each side) 
in both sexes. Male with anterior tarsi normally dilated, 
first 3 segments biseriately squamulose. Length 23-28 ; 
width about 7. 4-8. 3 mm. 
Holotype $ (M. C. Z. Type No. 29,010) and 19 para- 
types all from near the town of Margaret River, south- 
western division of Western Australia, October, 1931, taken 
under logs on the ground in eucalyptus woods. 
This is the first species of the whole Trichosternus com- 
plex to be found in Western Australia. It is a very dis- 
tinct species, and I am unwilling to assign it to any recog- 
nized subgenus of the genus, much less to say to what other 
species it is most closely related. Superficially it is some- 
thing like T. (Castelnaudia) speciosus SI., but is more 
parallel-sided, with sides of prothorax not or at most faintly 
sinuate, and with elytral intervals all about equally convex. 
Trichosternus soror n. sp. 
Form average in genus, small, rather convex; piceous 
black, upper surface purplish, color brightest on head and 
pronotum; legs piceous; antennae with 3 basal segments 
reddish piceous, outer ones browner; head and pronotum 
shining, with microsculpture fine, light, about isodiametric 
on head, slightly transverse on pronotum ; elytra duller but 
still somewhat shining especially on tops of subcostate in- 
tervals, with more deeply impressed, fine, isodiametric 
