On Aquatic Carnivorous Coleoptera or Dytiscidce. 519 



721. Agabus (Gaurodytes) miinmi, Sahl., Not. fenn. XIV, p. 182. — Oblongo- 

 ovalis, niger, supra senescens, antennis pedibusque rufis, vel nitidus et in elytris 

 subtiliter reticulatus punctulatiisque (S), vel sericeo-opacus et subtilissime reti- 

 culatus, (p) ; prothoi'ace lato, anterius conspicue angustato, lateribus curvatis, 

 angulis posterioribus rotundato-obtusis, margine lateral! baud crasso. Long. 7i, 

 lat. 4 m.m. 



The male has the three basal joints of the front and middle tarsi a little incras- 

 sate and furnished beneath with rather dense and short glandular hairs, the claws 

 of the front feet are elongate, but are scarcely visibly sinuate beneath; the 

 difference in the sculpture of the upper surface in the sexes is very conspicuous. 



Northern Euroi)e, (Finland to 66^ 10', according to Sahlberg). 740. 



722. Agabus sibericus, n. sp. — Oblongo-ovalis, niger, supra aenescens, sat nitidus, 

 antennis pedibusque rufis ; prothorace lato, anterius conspicue angustato, lateribus 

 curvatis, angulis posterioribus rotundatis, obtusis, margine laterali baud crasso ; 

 elytris crebre conspicue reticulatis et punctulatis. Long. Si, lat. 4|- m.m. 



Li the male the three basal joints of the front and middle tarsi are a good deal in- 

 crassate and furnished beneath with glandular hairs, the claws of the front feet are 

 elongate, but scarcely visibly sinuate beneath ; the species is very closely allied to 

 Dytiscus wasastjernae but is larger, and the male has the front tarsi much more 

 differentiated from those of the female. 



Eastern Siberia. 741. 



723. Agabus [Gaurodytes) walsinghami. Crotch, Tr. Am. Ent. Soc. IV, p. 419. — 

 Oblongo-ovalis, niger supra aenescens, nitidus, antennis rufis, pedibus piceo-rufis, 

 illis apice summo nigricante ; prothorace anterius angustato, lateribus leviter 

 curvatis, angulis posterioribus obtusis, subrotundatis, margine laterali lato ; elytris 

 crebrius subtiliter reticulatis, et inconspicue punctulatis, pone medium guttula tenui 

 pallida. Long. 92, lat. 5 m.m. 



The male has the three basal joints of the front and middle tarsi distinctly incrassate 

 and furnished beneath with long glandular hairs, the claws of the front feet are much 

 elongate and sinuate beneath. There is also a slight but distinct difference in the 

 sculpture of the sexes, the female having a slight silky opacity on the elytra : the 

 front of the head and the sides of the thorax towards the front are rufescent. 



North America, (Oregon). 742. 



