Notes on Australian Coleoptera. 169 
Promecoderus Scawroides: length 4’—5’ ; black, brillant ; 
head smooth, with a most feeble transverse impression 
behind the eyes; thorax semicircular, truncated in front, 
globular, having two transverse impressions, one in front 
and the other behind, and a longitudinal sulcate in the 
middle, extending to the posterior margin; elytra oval, with 
longitudinal striz, not extending to the lateral margin; a 
punctiform impression, and a short longitudinal sulcate on 
the posterior part of the margin ; lower side of the body of 
a shiny brown ; segments of the abdomen having on each 
side a punctiform impression, which extends in the form of 
a short oblique sulcate towards the centre; labrum black, 
palpi, mandibule, and antenne, brown ; thighs black, with 
the tibiz generally brown ; tarsi reddish. 
Swan River. 
Promecoderus Elegans: length 53’; of a brilliant copper 
colour ; head with two punctures in front, and a transverse 
impression behind the eyes; thorax cordiform, longer than 
broad, strongly sulcated longitudinally in the middle, trans- 
versally impressed in front and behind; elytra oval, rather 
broad, sub-depressed ; they are covered with strong lon- 
gitudinal striz, which do not extend to the margin ; 
on the lower part of this margin are one or two 
punctures, and a short longitudinal sulcate; lower side of 
the body of a green copper colour ; segments of the abdomen 
with a punctiform impression on each side ; antennee with 
their six first articles of a dark brown, the others of a lighter 
colour, and hirsute ; thighs black ; parts of the mouth and 
tarsi of a light reddish brown. 
From Melbourne. 
This insect comes near Gibbus, but is quite different, on 
account of its light elegant form, and the elytra much more 
oval. 
Promecoderus Oblongus : length 64’ ; elongated, with the 
sides nearly parallel; of a metallic green; head with two 
longitudinal impressions in front, and a transverse one 
behind the eyes ; thorax with a strong transverse impression 
in front, another behind, and a deep longitudinal sulcate 
on the posterior part; the surface is entirely covered with 
transverse and sinuous striolee ; elytra oblong, convex, almost 
parallel laterally, covered with rather faint longitudinal eleva- 
tions on the posterior part of the margin a punctiform 
impression and a short longitudinal sulcate ; lower side of the 
body, labrum, mandibule, and legs black ; tarsi and antennez 
N 
