On Aquatic Carnworous Coleoptera or Dytiscide. 517 
717. Agabus (Gaurodytes) strigulosus, Crotch, Tr. Am. Ent. Soc. IV, p. 422.— 
Oblongo-ovalis, angustulus, niger, supra fuscescens, prothorace elytrorumque lateribus 
vage testaceis, antennis pedibusque rufis ; supra ubique evidenter reticulatus. Long. 
6, lat. 3 m.m. 
In this species, the reticulation of the upper surface though fine is quite distinct, 
and forms large meshes, which are as conspicuous on the head and thorax as on 
the elytra. The male has the three basal joints of the front and middle tarsi 
distinctly incrassate, and furnished beneath with short hairs which bear distinct 
palettes. The female I have not seen. 
The prosternal process in this species 1s moderately compressed, and is much 
punctulate : by the form and sculpture a relationship with Dytiscus striolatus is 
suggested, but the male tarsi are differently clothed, and the supra-articular border 
is quite ordinary. 
North America, (California). 748. 
Group 11. 
Outline of thorax and elytra discontinuous, male front tarsi slender, but with 
long claws ; prosternal process rather small, nearly flat, very finely margined, feebly 
punctate ; metasternal groove imperfect ; swimming legs elongate, slender, and 
feeble ; hind coxe rather small, but wings of metasternum not large. 
Two Old World (Siberian) species. 
718. Agabus sahlbergi, n. sp.—é Oblongo-ovalis, niger, nitidus, antennis palpis 
pedibusque rufis ; prothorace lateribus leviter rotundatis, basi utrinque subrotundato, 
angulis posterioribus obtusiusculis, margine laterali crasso ; elytris nitidis subtilius 
reticulatis, versus apicem nitidis haud rugosis. Long. 73, lat. 4s m.m. 
This species is shorter than Agabus armeniacus (No. 671), and has the base of 
the thorax a little more curved and the hind angles more obtuse, and the reticulation 
of the elytra is not quite so distinct. The difference in the sculpture of the elytra, 
and the shape of the hind angles of the thorax distinguish it from Dytiscus guttatus 
(No. 670), to which it is closely allied. 
LT have seen but a single individual, which is a male, and has the three basal 
joints of the front and middle tarsi a little incrassate and furnished beneath with 
short hairs ; the claws of the front feet are elongate and slender, and a little sinuate, 
especially the anterior one. 
3X2 
