340 
MEMOIRS OF THE QUEENSLAND MUSEUM. 
Metriorrhynchus semiflavus n. sp. 
<J. Black, prothorax, scutellum, basal third of elytra, coxae, trochanters, 
prosternum, and mesosternum flavous. 
Rostrum absent- Antennae strongly serrated or subpectinated. Prothorax 
moderately transverse, sides notched in middle and strongly triangularly dilated 
to base ; regularly seven- areolate. Elytra narrow, parallel -sided to near apex ; with 
regular double rows of punctures, the alternate interstices moderately elevated on 
basal half, very feebly elevated posteriorly. Abdomen deeply notched. Length, 
8 mm. 
Queensland : Kuranda (F. P. Dodd). Type (unique), in South Australian 
Museum. 
Of the shades of colour of some specimens of M . longicornis , but pale portion 
of elytra longer and scutellum pale, the alternate interstices of elytra are also less 
strongly elevated, posteriorly being scarcely different from the others. It is 
strikingly like M. ampliatus and Trichalus semiatratus ; the former has very different 
prothoracic areolets, and the latter differs in generic features. 
Metriorrhynchus uniseriatus Lea. 
Mr. Hacker has taken, in the National Park of Queensland, some specimens 
that are considerably larger than usual (up to 11 mm.) 
Metriorrhynchus mimicus Lea. 
A specimen from Apollo Bay in the National Museum evidently belongs to 
this species, but differs from the type in having the elytral margins red almost to 
the base, and the red curved round the suture for a short distance, but the tips 
(except for the margins) not reddish. 
Metriorrhynchus crassipes Lea. 
Six specimens of this species were recently taken on Groote Eylandt : the 
female differs from the male in having the antennae distinctly shorter and less 
serrated and the abdomen not notched. The pale portion of the abdomen is variable ; 
sometimes two segments only are pale, sometimes three, or two and part of a third : 
at first glance the pale segments are suggestive of the phosphorescent parts of fireflies 
(Luciola spp.). 
Trichalus metasternalis n. sp. 
cj. Black and flavous. 
Rostrum absent. Antennae slightly passing flavous part of elytra ; third 
joint suboblong, fourth-tenth moderately serrated, eleventh narrowly elliptic, 
slightly longer than tenth. Prothorax distinctly transverse, base (except that the 
hind angles are produced outwards) very little wider than apex ; triareolate, the 
median areolet narrow and continued to apical fourth. Elytra narrow, parallel- 
sided to near apex : subsutural costa trifurcate near base, elsewhere with regular 
double rows of punctures, the alternate interstices moderately elevated. Abdominal 
notch deep. Length, 6-8 mm. 
$. Differs in having the antennae shorter and less serrated, and abdomen 
not notched. 
