856 On Aquatic Carnivorous Coleoptera or Dijtiscidcp. 



The individuals from Eastern Siberia are a little smaller, less elongate in form, 

 and have the reticulation of the upper surface rather finer than the type form from 

 the Arctic regions ; the individual from Labrador is slightly larger and is nearly 

 black, and has the reticulation of the surface not so dense. 



Northern Euioiie and Siberia ; Eastern Siberia ; Labrador, (Sweden ; Finland, to 69°, Sahlberg 

 (ieruiany ; Siberia, Kantaika, Angara). 8t9. 



792. Dysticus fuliginosus, Fab., Ihjhius fuliginosus, M.C. — Ovalis, fere angustus, 

 sat convexus, subnitidus, rufo-testaceus, supra aneus, capite thoracisque lateribus 

 plus minusve ferrugineis, elytris late testaceo-marginatis, margine ante apiceni 

 obsoletescente; supra dcnsius subtiliusque reticulatus ; coxis posterioribus parcius 

 obsoletiusque strigosulis, margine anteriore breviter et minus abrupte deflexo. 

 Loner. 10, lat. o m.m. 



The male has the basal joints of the front and middle tarsi a good deal incrassate, 

 and furnished beneath with long hairs, bearing narrow palettes ; the claws of the 

 front feet are moderately elongate, and but little curved, the posterior one being 

 rather broadly emarginate near the base ; on the hind feet, the outer claw differs 

 from the inner very little, except that it is considerably shorter ; the last 

 ventral segment has the apical portion covered with long though not very deep 

 rugas, and has a short carina in the middle : the female has a large emargination 

 at the apex of this segment, and in the middle a coarse prominence or short fold. 



The species varies a good deal in size ; and the yellow colour of the under 

 surface and lateral margin of the elytra seems easily stained of a darker colour by 

 decomposition of the contents of the body. 



Europe; North America ; (S>veden ; Finland to 64 , Sahlberg ; Britain, France, Germany). 851. 



793. Ilybius meridionalis, Aub^, M.C. — Ovalis, baud angustus, sat convexus, 

 subnitidus, subtus piceo-ferrugineus, supra ajneus, capite anterius, prothoracis 

 lateribus elytrorumque margine (anterius late) ferrugineis, antennis testaceis, 

 pedibus rufo-piceis ; supra densius subtiliusque reticulatus ; coxis posterioribus 

 parcius obsoletiusque strigosulis, margine anteriore extus longius et sat abrujite 

 deHexo. Long. 11, lat. G m.m. 



This species is broader than Dytiscus fuliginosus, and has the under surface 

 generally darker, and the pale margin of the elytra less developed and less 

 definite ; the sexual characteristics of the two sjaecies seem almost exactly the same ; 

 although so similar in most respects, the two species can be readily and certainly 

 distinguished by the greater development forwards of the hind coxaj in L meridi- 

 onalis, so that the wings of the metasternum are more abbrevitited> especially in 

 their outer portion. 



Sotithera Europe; Corsica; (France, Spain, Portugal, Italy). 852. 



