On Aquatic Carnivorous Coleoptera or Dytiscide. 497 
much incrassate and furnished beneath with very short glandular hairs; the middle 
tarsi are not so much incrassate as the front ones. 
This species is allied to Dytiscus guttatus, and some of the extreme varieties of 
that species approach considerably to it, but it appears to me really distinct. It is 
broader, and the peculiar sculpture is much more developed than in the most 
extreme varicties of D. guttatus ; the prosternal process is broader, and the basal 
joints of the front tarsi of the male are more incrassate. 
Styria, (Herr Tschapek). 1166. 
670. Dytiscus guttatus, Payk.. Agabus guttatus, M.C_—Oblongo-ovalis, niger, 
nitidus, antennis, palpis pedibusque rufis, elytris guttis duabus parum distinctis 
testaceis ; prothorace lateribus subrectis, basi quam apice paulo latiore, basi utrinque 
fere recto, angulis posterioribus rectis, margine laterali crasso ; elytris versus apicem 
fere opacis et rugulosis, anterius nitidis. Long. 8, lat. 4 m.m. 
In the female the elytra near the base are finely but quite distinctly reticulate or 
coriaceous, in the male this reticulation is less distinct, and the surface near the 
base has almost the appearance of being finely and closely punctulate ; in each sex 
the roughening of the surface at the extremity is greater than in the allied species. 
In the male the basal joint of the front and middle tarsi is a good deal incrassate, 
and the two following joints are a little so, and the three joints are clothed beneath 
with very short glandular hairs. The two claws of the front feet are similar and 
simple. 
The species varies in the colour of the legs, these being sometimes piceous, and 
the sculpture also shows some curious variations. 
Europe, (Sweden ; Finland, to 68° 20’ North, Sahlberg ; Britain, France, Germany, Northern Italy). 
724. 
671. Agabus armeniacus, n. sp.—dé Oblongo-ovalis, niger, nitidus, antennis palpis 
pedibusque rufis, elytris guttis duabus parum distinctis testaceis; prothorace 
lateribus fere subrectis, basi quam apice paulo latiore, basi utrinque leviter obliquo, 
angulis posterioribus obtuse rectis, margine laterali crasso; elytris versus apicem 
subopacis, anterius nitidis et levigatis. Long. 9, lat. 4¢ m.m. 
Extremely closely allied to Dytiscus guttatus (No. 670), but with the base of the 
thorax not quite so straight, so that the hind angles are slightly more obtuse, and 
with the elytra (in the male at any rate) smoother, as in Dytiscus biguttatus (No. 
676). The tarsi of the male are formed as in D. guttatus, but the front claw 
on the anterior is thicker than the other claw. The female I have not seen. 
Trebizond, Daghestan. 725. 
