129 
strie deeply impressed (fifth, sixth, and seventh weaker), strongly 
crenulate, first flexuous (curving towards suture) near base, 
seventh obsolete towards shoulder for about one-fourth of length ; 
interstices flat, four inner ones a little convex, ninth punctate 
along course of eighth stria; border narrowly reflexed on sides, 
very little raised at humeral angles, and joining the basal border 
in a wide, not angular, curve. Mestasternum (on posterior parts 
of sides), metasternal episterna, and ventral segments punctulate. 
Length, 10; breadth, 4 mm. 
Only two of the described species of Loxandrus from Australia 
are known to me, viz., ZL. atronitens, Macl., and L. widipennis, 
Casteln. Of these Z. atronitens has the basal part of the pro- 
thorax punctulate, and the interstices roundly convex—features 
that at once separate it from LZ. iridipennis and L. australiensis. 
The conspicuous difference between L. iridipennisand L.australien- ° 
sis is in the shape of the prothorax. JL. iridipennis has the base 
of the prothorax evidently wider than the apex, the sides being 
very lightly narrowed to the base, the border extends along the 
base, is wide on the sides, increasing in width backwards from 
the anterior marginal puncture and becoming explanate at the 
basal angles, where it has the posterior marginal puncture placed 
upon it; while ZL. australiensis has the prothorax more convex, 
much more strongly rounded on the sides, decidedly narrowed to 
the base, the border narrow (never explanate), and obsolete on 
the middle of the base ; it has the anterior angles, too, wider and 
less advanced, and the antenne a little stouter. The basal border 
of the elytra is weaker in ZL. australiensis than in either L. 
iridipennis or L. atronitens, ‘and the humeral angle is more 
rounded, with a finer border, which joins the basal border in a 
rounded curve without a perceptible angle. (The seventh stria 
of the elytra is obsolete for a considerable distance behind the 
shoulder; there are sometimes traces of this in specimens of 
L. iridipennis). 
RHYTISTERNUS OBTUSUS, %. sp. 
Oblong, rather convex; prothorax cordate, base (2:8 mm.) 
narrower than apex (3 mm.); elytra with four inner striz of 
each very strongly impressed, the interstices convex. Black, 
shining ; tarsi piceous ; palpi and antenne reddish-piceous. 
Head convex, obsoletely transversely impressed behind vertex ; 
frontal impressions strong, diverging backwards ; eyes reniform, 
not so prominent as usual in the genus. Prothorax cordate, 
transverse (3 x 3°8 mm.), widest about middle, convex, declivous 
to base ; disc lightly transversely striolate; sides rounded on 
anterior two-thirds, decidedly and obliquely narrowed on posterior 
third ; anterior margin truncate; base sub-truncate, rounded to 
