On Aquatic Carnivorous Coleoptera or Dytiscide. 
Or 
~I 
NI 
Grovp 6. (No. 846). 
Elytra without submarginal stria, but with eleven strize on each. 
The striz in this species are very perfect. 
846. Copelatus nigrolineatus, n. sp.—Ovalis, sat angustus, subdepressus, supra 
testaceus, prothorace medio late fusco, elytris sordide testaceis basi lateribusque 
dilutioribus, corpore subtus ferrugineo: elytris striis undecim elongatis, tribus 
internis anterius obsoletis. Long. 53, lat. 2? m.m. 
The elytra in this species have eleven equidistant lines, of which the three internal 
become so fine as to disappear before reaching the base, all the lines extend nearly 
to the apex, but some, notably the first and outer one, are a little shorter than the 
others, there is no trace of a marginal stria. The male has the front and middle 
tarsi a little dilated, the front tibize simple. ‘There are no sexual disparities in the 
sculpture. 
Australia, (Champion Bay, Carpentaria, Port Denison, Port Bowen). 677. 
Group 7. (No. 847). 
Elytra without submarginal strize but with about twelve other striz: on each, 
which however are more or less broken or irregular. 
The very peculiar species I have thus isolated might almost have been placed among 
the species destitute of true strize, for the deep lines on its elytra are much broken 
and irregular; nevertheless as it is not closely allied to any species of the group 
destitute of true strize and as moreover the linear arrangement of the broken striz 
is quite conspicuous in spite of their irregularity, I have placed it amongst the 
striate groups. 
847. Copelatus interruptus, n. sp.—Ovalis, angustulus, sat depressus, picescens, 
prothorace ad angulos anteriores dilutiore, elytris piceo-testaceis, antennis pedibus- 
que sordide testaceis; capite prothoraceque obsolete punctulatis; elytris striis 
undecim vel duodecim conspicuis sed disintegratis. Long. 6, lat. 3m.m. 
This species is very easily distinguished by the peculiar, broken-up strize of the 
elytra. ‘The male has the tront and middle tarsi a little incrassate; the only female 
I have seen has the strize of the elytra finer and still more broken-up than they are 
in the male. 
It is possible, but not clear to me, that this may be the Agabus interruptus 
Perroud, (see description No. 1,192). 
New Caledonia. 681. 
