On Aquatic Carnworous Coleoptera or Dytiscide. 549 
subleevigatis, versus apicem dense minuteque rugosis; prosterni processu lato, 
utrinque longitudinaliter depresso, apice acuminato. Long. 8, lat. 43 m.m. 
The male has the front and middle tarsi a little incrassate, and the three basal 
joints provided on rather a large space with glandular hairs; the hinder claw on 
the front feet is a little shorter and thicker than the anterior one. Although the species 
is very variable in its sculpture, there seems to be no sexual disparity in this 
respect. Itis not easy to find two individuals exactly similar in colour; and 
the variations of size and sculpture are also very great. The largest individuals I 
have seen are from Piedmont, and are extremely smooth and shining, the elytra 
appearing in fact almost free from sculpture: the smallest individuals are those 
found in Scotland, and in them the sculpture of the wing cases is (comparatively) 
deep, and the surface dull; and in this same variety the yellow markings of the 
elytra are reduced to the marginal band. In the mountains of Spain, a variety (A. 
graelisi, Har.) is found having the sculpture dense and deep, and the yellow marks 
on the elytra forming two or three pale spots on each. All the variations are found, 
when an extensive series is examined, to be connected together in the most intimate 
and complicated manner. 
Europe. (North America ?) ; (Sweden ; Finland to 68° 30' North, Sahlberg ; Britain ; France ; Spain ; 
Piedmont ; Germany). 834. 
779. Agabus sinuatus, Aubé, M.C.—Ovalis, statura coloreque variabilis, ferru- 
gineus, vertice, prothorace elytrisque variabiliter infuscatis, (vel subeenescentibus), 
his ad basin et ad marginem exteriorem anterius plus minusve testaceo-signatis ; 
corpore supra punctis impressis, crebribus, conspicuis, preetereaque plus minusve 
minute ruguloso, rugulositate hac versus elytrorum apicem profunda et densissima ; 
prosterni processu lato, plano, tenuiter marginato, haud impresso, apice acuminato. 
Long. 83, lat. 4 m.m. 
The three basal joints of the front and middle tarsi are in the male very little 
- incrassate, but they are furnished beneath with moderately long glandular hairs ; 
the front claws are equal, if there be a difference the hinder one is slightly more 
slender than the front one. 
This species seems to be almost as variable as Dytiscus maculatus, but may be 
readily distinguished by the presence of a conspicuous true punctuation on the 
upper surface, and by the finely margined, unimpressed prosternal process. 
Syria, Caucasus, Asia Minor, Northern Persia. 835. 
780. Agabus pictipennis, Sharp, Tr, Ent. Soc. Lond. 1873, p. 49.—Ovalis, sub- 
depressus, pernitidus, subleevigatus, colore variabilis, ferrugineus, capite et thorace 
plus minusveinfuscatis, elytris fuscis, fascia basali maculisque sublateralibus testaceis ; 
prothorace haud brevi, angulis posterioribus subacutis ; elytris omnium obsoletissime 
4B2 
