500 On Aquatic Carnivorous Coleoptera or Dytiscidea. 
minus distincte pallido-notatis, prothorace lateribus sat crasse marginatis, vix per- 
spicue curvatis, antrorsum sat angustatis, angulis posterioribus rectis. Long. 8, 
lat. 4 m.m. 
The male has the basal joints of the front and middle tarsi very slightly incras- 
sate, the basal two being furnished beneath with short glandular hairs, the claws 
are quite simple. Although the surface looks very polished, there is a very 
obsolete reticulation of the elytra, and this is a little more conspicuous in the female 
than it is in the male. Though allied to Dytiscus biguttatus, this species 1s much 
smaller, and the hind tarsi are not quite so elongate and slender. 
Europe, (Spain and Portugal). 732. 
678. Agabus binotatus, Aubé, M.C.—Oblongo-ovalis, nitidus, levigatus, niger, 
antennis rufis ; elytris rufis, fusco-suffusis, limbo dilutiore, pone medium macula 
plus minusve distincta pallida, prothoracis lateribus rufis, pedibus piceis; prothorace 
crasse marginato, lateribus leviter curvatis, angulis posterioribus fere rectis, vix 
obtusis. Long. 84, lat. 4 m.m. 
The male has the basal joints of the front and middle tarsi slightly thickened, 
the first and second being also clothed beneath with short glandular hairs. 
Europe, (Corsica, Sardinia). 733. 
679. Agabus castaneus, n. sp.—Ovalis, nitidus, levigatus, subtus niger, supra 
castaneus, antennis palpis pedibusque rufis, femoribus piceis ; prothorace antrorsum 
angustato, lateribus obliquis haud curvatis, angulis posterioribus fere rectis, vix 
acutis, margine laterali sat crasso. Long. 8, lat. 4¢ m.m. 
The male has the basal joints of the front and middle tarsi a little thickened, 
and the first and second furnished beneath with short glandular hairs: the female 
is unknown to me. 
Syria, (Mount Sannin). 734. 
680. Dytiscus paludosus, Fab., Agabus paludosus, M.C.—Ovalis, sat convexus, 
levis, nitidus, niger, capite anterius prothoracis lateribus elytrisque rufescentibus, 
antennis pedibusque anterioribus rufis, femoribus medio picescentibus, pedibus 
posterioribus piceis. Long. 7, lat. 4 m.m. 
In this species the hind angles or the thorax are about rectangular, and the out- 
line of the elytra is but little discontinuous with that of the thorax. The upper 
surface is very smooth and shining, and there is no sexual disparity of sculpture, 
The male has the front and middle tarsi with the basal joints a little incrassate 
and furnished beneath with moderately short glandular hairs. 
Europe, (Sweden ; Finland to 62°, Sahlberg ; Britain; France; Spain; Germany). 735. 
