On Aquatic Carnivorous Coleoptera, or Dijtiscidce. 497 



much incrassate and fiirnisbed 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 tlie peculiar sculpture is much more developed than in the most 

 extreme varieties of D. guttatus ; the prosternal process is broader, and the basal 

 joints of the front tarsi of the male are more incrassate. 



Stvria, (Herr Tschapek). 1166. 



670. Dytiscus guttatus, V-e^y^.. Agahus guttatu.'^, M.C. — Oblongo-ovalis, niger, 

 nitidus, antennis, palpis pedibusque rufis, elytris gnttis duabus parum distinctis 

 testaceis ; prothorace lateribus subrectis, basi quam apice paulo latiore, basi utrinque 

 fere recto, angulis posterioribus rectis, raargine lateral! 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, Nortliern Italy). 

 724. 



(J71. Agabus armeniacus, n. sp. — S 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 levitei- obliquo, 

 angulis posterioribus obtuse rectis, margine lateral! crasso ; elytris versus apicem 

 subopacis, anterius nitidis et leevigatis. Long. 9, lat. 41 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. 



