67u On Aquatic Carnivorous Coleoptera or Dytiscidce. 



which nearly reaches the scutellum. In other respects the s^aecies agrees closely 

 with D. vittatus. 



I have seen only a single male. 



Borneo. 1042. 



1048. Hydaticus bowringi, Clk., M.C. — Ovalis, latus, convexus, capite anterius 

 testaceo, posterius nigro, prothorace testaceo basi transversim in medio, margineque 

 anteriore in medio, nigris, elytris perspicue punctulatis, nigris, vittis duabus elongatis 

 punctoque rotundato prope scutellum testaceis ; corpore subtus ferrugineo, antennis 

 pedibusque anterioribus testaceis, tibiis intermediis piceis, tibiis tarsisqae posteriori- 

 bus nigris. Long, 14, lat. 9 m.m. 



This species seems closely allied to Dytiscus vittatus, but is rather larger and 

 broader, it is paler beneath, and has the punctuation of the elytra coarser, the thorax 

 is in greater part yellow, the external yellow stripe on the elytra is more elongate 

 and the inner one is nearer to the suture, and there is always a conspicuous yellow spot 

 near the scutellum. In most other respects it resembles the well known D. vittatus. 

 The male tarsi are much the same in the two species, except that in H. bowringi 

 the fringing hairs on the anterior feet are rather better developed : the female has 

 an indefinite patch of dense fine sculpture on each side of the thorax. 



Sometimes the external yellow stripe of the elytra is a little abbreviated and then 

 does not connect with the inner stripe, it alwaj's however extends much beyond 

 the middle. 



Japan, China, (Che-fou), (Australia? teste Clark). 1043. 



1049. Dytiscus vittatus, Fab., Hydaticus vittatus M.C. — Ovalis, sat latus et 

 convexus, niger, capite anterius prothoraceque ad latera testaceis, elytris vitta 

 elongata cum margine externo parallela testacea, aliaque humerali abbreviata stepius 

 cum vitta elongata ad dimidiam partem longitudinis conjuncta ; antennis pedibusque 

 anterioribus testaceis, tibiis intermediis piceis, femoribus fusco-testaceis. Long. 12, 

 lat. 7 m.m. 



In the male of this species there are about twenty-two palettes on the underside 

 of the not very large front tarsi, and the fringing hairs round the base are short : 

 the intermediate tarsi have the thi'ee basal joints moderately incrassate and bearing 

 beneath two series of small palettes, these series are separated by a distinct glabrous 

 space or line, and the inner of the two series is rendered irregular by the 

 addition of a supernumerary palette near the base ; these palettes are about fifteen 

 in number altogether. 



The females have generally a patch of sexual sculpture on each side of the thorax, 

 this however is very variable in its character and is sometimes entirely wanting : in 



