556 On Aquatic Carnivorous Coleoptera or Dytiscide. 
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 Europe and Siberia; Eastern Siberia; Labrador, (Sweden; Finland, to 69°, Sahlberg 
Germany ; Siberia, Kantaika, Angara). 849. 
792. Dysticus fuliginosus, Fab., Llybius fuliginosus, M.C’_—Ovalis, fere angustus, 
sat convexus, subnitidus, rufo-testaceus, supra «wneus, capite thoracisque lateribus 
plus minusve ferrugineis, elytris late testaceo-marginatis, margine ante apicem 
obsoletescente ; supra densius subtiliusque reticulatus ; coxis posterioribus parcius 
obsoletiusque strigosulis, margine anteriore breviter et minus abrupte deflexo. 
Long. 10, lat. 5 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 
rugee, 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 ; (Sweden ; Finland to 64°, Sahlberg ; Britain, France, Germany). 851. 
793. Llybius meridionalis, Aubé, M.C.—Ovalis, haud angustus, sat convexus, 
subnitidus, subtus piceo-ferrugineus, supra eneus, capite anterius, prothoracis 
lateribus elytrorumque margine (anterius late) ferrugineis, antennis testaceis, 
peaibus rufo-piceis ; supra densius subtiliusque reticulatus ; coxis posterioribus 
parcius obsoletiusque strigosulis, margine anteriore extus longius et sat abrupte 
deflexo. Long. 11, lat. 6 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 species 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 coxe in I. meridi- 
onalis, so that the wings of the metasternum are more abbreviated, especially in 
their outer portion. 
Southern Europe ; Corsica ; (France, Spain, Portugal, Italy). 852. 
