On Aquatic Carnworous Coleopteru or Dytiscide. 695 
band is; this latter always completely reaches the hind margin. The wing-cases 
have a dark appearance owing to the great predominance of the black over the 
yellow colour. There seems to be little variation in any respect. 
Europe (Sweden, Germany, France, Switzerland, Hungary). 993. 
1089. Graphoderes perplexus, n.sp.—Ovalis, anterius angustatus, sat convexus, 
nitidus, testaceus, capite vertice signaturisque frontalibus, et prothorace fasciis duabus 
nigris, elytris creberrime nigro-vermiculatis; prothoracis fascia nigra anteriore 
marginem anteriorem haud attingente, fascia posteriore lateraliter ante angulum 
posteriorem desinente, elytrorum epipleuris angustis. Long. 14, lat. 8§ m.m. 
In the male of this species there are about twenty-eight smaller palettes on the front 
feet besides the three larger one, while on the middle feet the palettes are the same as 
in Dytiscus cinereus, viz., six on the basal and four on each of the two following 
joints, making in all fourteen arranged in two longitudinal series. The female 
resembles the male in sculpture, but is rather shorter in form, having the thorax 
distinctly shorter and hence there is some difference in the prothoracic vitte ; the 
anterior one is short (in the antero-posterior direction) and leaves a yellow band in 
front of it, the posterior band is rather larger in the male than in the female, but 
in neither sex does it quite attain the hind margin; the yellow space separating 
the two black bands is much greater in the male than in the female. 
The species is closely allied to Dytiscus zonatus (No. 1091), but is rather different 
in form being narrower in front, the epipleurze are not quite so narrow, and the 
male seems to have no palettes on the middle feet in addition to those of the two 
longitudinal series. 
I have seen only two individuals ; the male from Dejean’s collection, which was 
erroneously called H. zonatus by Aubé, and a female in my own collection found by 
EK. Doubleday in the United States. 
North America. 994. 
1090. Graphoderes elatus, n. sp.—Sat convexus, nitidus, testaceus, capite vertice 
signaturisque frontalibus, prothorace fasciis duabus nigris, elytris creberrime nigro- 
vermiculatis ; prothoracis fascia nigra anteriore marginem anteriorem haud 
attingente, fascia posteriore lateraliter ante angulum posteriorem desinente ; 
elytrorum epipleuris mediocribus. Long, 14, lat. 8} m.m. 
In the male, there are about thirty-two palettes, in addition to the three larger 
ones, on the front feet ; on the middle feet there are fifteen palettes arranged in 
two series as in D. cinereus, with the exception that there is on the second joint a 
supernumerary palette outside the external series. The female I have not seen. 
The species resembles Dytiscus zonatus excessively, but is rather broader, more 
