398 Mr. G. J. Arrow on Rutelid Coleoptera. 
The purplish lustre characterizing all the specimens I have 
seen may, perhaps, not be absolutely constant, but another 
feature distinguishing this species from the two just mentioned 
is presented by the apices of the elytra, which are separately 
rounded. 
Although these three insects are the only described species 
of this section of the genus, it consists of a number of closely 
related forms. As I am not able to decide with certainty 
which of these is Burmeister’s species, it would be unwise to 
attempt at present to name the other nondescripts. 
Another beautiful Australian Rutelid, also sexually di- 
morphic, requires further description. This is the Popitlia 
flavomaculata of McLeay, a species probably described froma 
single specimen and quite erroneously placed. Specimens of 
this insect have lately been brought from Mount Bellenden 
Ker, in North Queensland, and it was only by an accident 
that I was led to consult McLeay’s description, for neither in 
form nor structure has the species any resemblance to Popdllia, 
a genus which is not known in Australia. The rather de- 
pressed and elliptical form and pubescent surface of flavo- 
maculata distinctly suggest Adoretus, but its mouth-parts dis- 
proveanysuch affinity. The flat prosternal process upstanding 
behind the coxz is known elsewhere among Rutelidee only in 
the genus A/imela, but the ten-jointed antenne, as well as its 
entire aspect, seem to exclude this insect from the Anoma- 
line. Although I am unable to pronounce upon the true 
place of this new genus in the family, its remarkable combi- 
nation of characters, together with the peculiar beauty of its 
colour and marking, will make it quite easy of identification 
when rescued from the obscurity of a great genus to which it 
does not belong. 
MIMADORETUS, gen. nov. 
Ellipticus, subdepressus. Clypeus subquadratus, transversus. La- 
brum simplex, late emarginatum. Mavxille 3-dentate, palporum 
articulo ultimo grandi, fusiformi, longitudine ad reliquos squali. 
Labium latum, margine paulo concava. Antenne 10-articulate, 
clava triphylla, parum elongata. Prosternum post coxas promi- 
nens, cuneiforme. Metasternum inter coxas medias acutum, non 
productum. Pedes omnes robusti. Tibise anticee fortiter biden- 
tate. Maris ungues integri, femine pedis antici externus fissus. 
The type of Mimadoretus flavomaculatus is evidently a 
female, in which sex the upper surface is of a light mahogany- 
colour, with a metallic lustre, especially upon ‘the prothorax. 
