528 On Aquatic Carnivorous Coleoptera or Dytiscide. 
740. Agabus altaicus, Gebl., M.C.—Ovalis, vix convexus, nitidus, niger, supra 
eenescens, prothoracis elytrorumque lateribus plus minusve rufescentibus, antennis 
pedibusque rufis, posterioribus picescentibus; elytris dense subtiliter reticulatis 
subtiliterque subpunctatis. Long. 7, lat. 4 m.m. 
The male has the three basal joints of the front and middle tarsi slightly incras- 
sate, and furnished beneath with moderately long glandular hairs; the claws of the 
front feet are moderately long, and almost simple, there being only a very slight 
emargination beneath near the base; the apical ventral segment is rugose at the 
apex. 
The species is very closely allied to Dytiscus chaleconotus, but is smaller, and 
has the metasternal groove considerably smaller ; and the sculpture of the elytra 
shows more distinctly than in D. chalconotus, that the reticulation has excessively 
fine punctures placed on it. 
Siberia. 772. 
741. Dytiscus vittiger, Gyll., Agabus vittiger, M.C_—Oblongo-ovalis, convexus, 
niger, nitidus, supra plus minusve zenescens, antennis pedibusque rufis, femoribus 
picescentibus; elytris evidenter reticulatis, punctis subseriatis majoribus ; pone 
medium vitta parvula laterali maculaque apicali minuta pallidis ; prothorace angulis 
posterioribus rotundatis. Long. 83, lat. 43 m.m. 
The male has only an extremely slight thickening of the basal joints of the front 
and middle tarsi, and they are furnished beneath with short glandular hairs, and 
the claws of the front feet are rather elongate and nearly simple; there is no 
difference in the sculpture of the upper surface in the sexes; but the apical ventral 
seoment is in the male very deeply strigose, while in the female it is pinched up in 
the middle, so as to form a short very elevated plica at the apex. 
Northern Europe, (Sweden; Finland to 68° 30/, Sahlberg). 759. 
742. Agabus neglectus, Er., M.C.—Ovalis, vix convexus, subnitidus, niger, supra 
zenescens, prothoracis elytrorumque lateribus plus minusve rufescentibus, antennis 
pedibusque rufis, posterioribus piceis; elytris densius’ subtiliusque reticulatis, et 
(preesertim versus apicem) subtilius punctulatis. Long. 8, lat. 47 m.m. 
The male has the three basal joints of the front and middle tarsi a little incrassate, 
and furnished beneath with moderately long glandular hairs; the claws of the front 
feet are rather long, and their lower edge is a little emarginate near the base so 
as to render the outline sinuous; the apical ventral segment is very deeply and 
coarsely rugose. Though very closely allied to Dytiscus chalconotus (No. 739), 
this is an undoubtedly distinct species; the sculpture of the upper surface is finer 
and denser, and the fine punctures placed on the meshes or reticulations of the 
elytra are more distinguishable. It is still more closely allied to Agabus altaicus, 
