On Aquatic Carnivorous Coleoplcra or /)i/tiscid(e, 6.95 



band is; this latter always completely reaches the hind margin. The wing-cases 

 liave 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, Hungai-y). 993. 



1089. Graphoderes perplexus, n.sp. — Ovalis, anterius angustatus, sat convexus, 

 nitidus, testaceus, capite vertice signaturisque frontalibus, et prothoracefasciis duabus 

 nigris, elytris creberrimc nigro-vermiculatis ; prothoracis fascia nigra anteriore 

 marginem anteriorem haud attingente, fascia posteriore lateraliter ante^angulum 

 posteriorem desinente, elytrorum epipleiiris angustis. Long. 14, lat. 8i 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 a.s 

 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 vittse ; 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 CNo. 1091), but is rather different 

 in form being narrower in front, the epipleuree 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 Aube, and a female in my own collection found by 

 E. Doubleday in the United States. 



North America. 994. 



1090. Graphoderes elatus, n. sp. — Sat convexus, nitidus, testaceus,rcapite vertice 

 signaturisque frontalibus, prothorace fasciis duabus nigris, elytris creberrime nio-ro- 

 vermiculatis ; prothoi'acis fascia nigra anteriore marginem anteriorem haud 

 attingente, fascia posteriore lateraliter ante angulum posteriorem desinente ; 

 elyti'orum epipleuris mediocribus. Long. 14, lat. 8i 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 tlie external series. The female 1 have not seen. 



The species resembles Dytiscus zonatus excessively, but is rather broader, more 



