On Aquatic Carnivorous Coleoptera or Dytiscide. 501 
68i. Agabus japonicus, Sharp, Tr. Ent. Soc. Lond. 1873, p. 50.—Ovalis, sat 
convexus, leevis, nitidus, niger, capite thoraceque vix subzenescentibus, elytris fuscis, 
basi humerisque vage rufescentibus, antennis tibiisque quatuor anterioribus, 
femoribus pedibusque posterioribus piceis. Long. 7, lat. 4¢ m.m. 
The male has only an extremely slight incrassation of the front and middle tarsi, 
and only a very narrow space on their underside clothed with glandular hairs; and 
the claws are simple. 
The species much resembles Dytiscus paludosus, but is rather broader, more oval, 
and the elytra and the thorax have their outline very continuous: and the serial 
punctures of the elytra are finer. 
Japan ; North China. 780, 
682. Agabus sequalis, n. sp.—Ovalis, sat convexus, fere levigatus, sat nitidus, 
niger, capite thoraceque vix subzenescentibus, hoc ad latera indeterminate rufes- 
cente, elytris fuscis, basi margineque externo testaceis, antennis pedibusque testaceis: 
elytris neque punctulatis, nec reticulatis. Long. 7, lat. 4 m.m. 
The male has the front and middle tarsi distinctly incrassate and furnished beneath 
with short hairs, which bear minute palettes, the front claws are quite simple and 
not elongate ; the hind tarsi have the two basal joints provided beneath with 
swimming hairs. ‘The female I have not seen. 
This species is very similar to Dytiscus paludosus (No. 680), but the colour is a 
little more obscure, and the upper surface less shining, and the serial punctures of 
the elytra are finer: the thorax is shorter behind the eyes, and its outline more 
continuous with the elytra, and the legs are of a paler colour. It is also excessively 
similar to Agabus japonicus, but the upper surface is less shining, the legs are 
paler in colour, the male tarsi are more incrassate, and the anterior border of the 
hind coxa is more arched so that the side wings of the metasternum are externally 
more abbreviate. 
Eastern Siberia, (Transbaikal). 781. 
683. Agabus raffrayi, n. sp.—Ovalis, sat convexus, levis, nitidus, niger, capite 
anterius prothoracisque lateribus haud late rufescentibus, elytris fusco-rufis, basi 
lateribusque dilutioribus, antennis tibiisque quatuor anterioribus rufis, femoribus 
pedibusque posterioribus piceis. Long. 72, lat. 4 m.m. 
The male has the basal joints of the front and middle tarsi a little incrassate, and 
furnished beneath with short hairs which bear minute palettes, the claws are 
simple : I think the two basal joints of the hind tarsus are provided beneath with 
swimming hairs. 
The species is excessively similar to Dytiscus paludosus (No. 680), butis slightly 
8 T 2 
