On Aquatic Carnivorous Coleoptera or DijtiscidcB. 577 



Gkol'p G. (No. 840). 



Elytra without submarginal stria, but with eleven strise on each. 

 The strise in this species are very perfect. 



84G. 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. 5i, lat. 2f m.ni. 



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 tibioe simple, 'i'here are no sexual disparities in the 

 sculpture. 



Australia, (Champion. Bay, Carpentaria, Port Denison, Port Boweii). 677. 



Group 7. (No. 847). 



Elytra without submarginal strise but with about twelve other strise on each, 

 •which however are more or less broken or irregular. 



The ver}' peculiar species I have thus isolated might almost have been placed among 

 the species destitute of true stripe, 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 strise and as moreover the linear arrangement of the broken strise 

 is quite conspicuous ia 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 diiutiore, elytris piceo-testaceis, antennis pedibus- 

 que sordide testaceis; capite prothoraceque obsolete punctulatis ; elytris striis 

 undecim vel duodecim conspicuis sed disintegratis. Long. G, lat. 3 m.m. 



This species is very easily distinguished by the peculiar, broken-up stria3 of the 

 elytra. The male has the front and middle tar^i a little incrassate; the only female 

 I have seen has the striae 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. l,U>-2). 



New CaleJonia. (581. 



