On Aquatic Carnvorous Coleoptera or Dytiscide. 515 
712. Agabus (Gaurodytes) clypealis, Thoms., Sk. Col. [X, p. 107.—Ovalis, nitidus, 
niger, prothorace subzenescente, lateribus, capite ex parte majore elytrisque rufes- 
centibus, his dorso late infuscatis, haud reticulatis, subtilissime punctulatis. 
Long. ? lat. @ ; 
The male has the basal joints of the front and middle tarsi a little incrassate, 
and furnished beneath with short hairs which bear distinct palettes, the claws of 
the front feet are but little elongate, and are simple. The female I have not seen. 
The species is very similar to Agabus subfuscatus, but is shorter, and the male 
front claws are less elongate, and the prosternal process is broader and shorter; it 
differs from Dytiscus congener (No. 706), by its prosternal process, and by the more 
arched anterior border of the hind coxze which makes the side wings of the meta- 
sternum shorter : it is also extremely similar to Dytiscus paludosus (No. 680), but 
has the side wings of the metasternum shorter, and the metasternal groove longer. 
Northern Europe, (Sweden and Finland). 767. 
713. Dytiscus nebulosus, Forst., Agabus nebulosus, M.C._—Ovalis, haud convexus, 
nitidus, subtus niger, supra testaceus, elytris capiteque nigro-variegatis, prothorace 
in medio szpius nigro-bimaculato, antennis pedibusque cum femoribus testaceis. 
Long. 82, lat. 42 m.m. 
The markings on the wing cases consist of numerous irregular black spots; the 
under surface has the margins and sides of the ventral segments as also the articular 
portions of the hind coxze more or less yellow. The male has the three basal joints 
of the front and middle tarsi distinctly incrassate, and furnished beneath with long 
hairs which bear palettes at their extremity, the claws of the front feet are rather 
long, and the anterior one is thickened or obtusely dentate at the extreme base. 
In both sexes the surface of the elytra seems to be very smooth, but when a careful 
examination 1s made it is seen that the females have the basal portion excessively 
minutely and finely reticulate or coriaceous. 
Europe, Sardinia, Algeria, Syria, Canary Islands. (Sweden, Britain, Germany, France, Spain). 750. 
714. Dytiscus conspersus, Marsh., Agabus conspersus, M.C’'—Ovalis, nitidus, 
(femina interdum subopaca) subtus nigricans, supra flavicans, elytris plus minusve 
fusco-nebulosis, capite nigricante vertice testaceo-bimaculato, clypeo testaceo, 
antennis pedibusque rufis, his femoribus plus minusve late infuscatis. Long. 8, 
lat. 43 m.m. 
This species is variable in the colour of the upper surface which is sometimes, 
with the exception of the variegated head entirely pallid, the elytra are generally 
however suffused with vague dark marks, and sometimes the middle of the thorax 
is also infuscate. The male has the front and middle tarsi with the three basal 
joints a good deal incrassate, and furnished beneath with lone hairs which bear 
5) oO 
TRANS, ROY. DUB. SOC., N.S., VOL. II. 3 X 
