On Aquatic Carnivorous Coleoptera or DijtisoidcB'. 751 



" Mas : tarsis anticis dilatatis, compressis, subtus longe pilosis, unguiculo interno latioie et crassiore, 

 basi subtus obtuse dentato. Loug. 10 (tbor. 2, elytra 7|), lat. elytra 5| m.ni." 



This is followed, I. c, by a description in Russian. The species is apparently peculiar in its colouration. 

 — D. S. 



1180. Agabus atratus, Mann., Bull. Mosc, 1853, III, p. 157. Russian If orth America. 



'• Oblongo-ovalis, aterrimus, opacus, striis anastomozantibus subtilissime recticulato-strigosus ; ore, 

 antennis, capite antice, epipleuris, segmentorum ventralium marginibus, tibiis tarsisque quatuor 

 anterioribus obscure rufis ; elytrorum lateribus disco parum dilutioribus ; pedibus posticis piceis. Longit. 

 5 lin., latit. 2| lin." 



This is omitted in Crotch's " Revision of the North American Dytiscidae." — T>. S. 



1181. Agabus bakewelli, Clk., Journ. Ent. II, p. 19. Australia. 



" Ovalis, subtilissime reticulosus ; striato-punctatus, niger, nitidus ; capite impunctato, inter oculos 

 undique foveolato, nigro, ore mentoque rufis ; thorace autice emarginato, lateribus rotundatis, tenue 

 marginatis, basi sinuato, antice ad luarginem punctis transverse notato : elytris punctorum seriebus 

 duabus subtiliter uotatis, ad latera infra medium obscure rufo maculatis ; pedibus antennisque rufis, 

 corpore subtus fusco-rufo. Long. corp. .3 lin., lat. \^ lin." 



'•■ A. bakewelli resembles in size and appearance A. affinis, Payk.; it is (besides other differences) more 

 ovate and less parallel : it is probable that in some examples the subcircular rufous marking near the 

 margin of the elytra may be obsolete." 



This should no doubt be refered to the genns Platynectes. — D. S. 



1182. Agabus confertus, Lee, Proc. Ac. Phil. 1861. p. 340. California. 



" Ovalis, modice convexus, oeneo-uiger, nitidus, dense punctulatus, baud reticulatus, thorace minus 

 fortiter marginato, latitudine fere triplo breviore, elytris lineola laterali guttaque postica pallidas ornatis, 

 seriebus punctorum solitis distinctis, antennis ore pedibusque anticis pioeo-nifis. Long. -32. Cabo de los 

 Reyes." 



\^A comparison with A. semivittatus, Lee, follows the above dia(/nosis.'\ 



I have i-ecently received for examination an individual of this species and find it difficult to locate in 

 any of the groups proposed by roe; it seems in fact to be between group 12, and group 19 ; it has the 

 approximate middle coxre of the former grouj), but its thorax is less rounded at the sides and less discon- 

 tinuous with the outline of the elytra, and the anterior portions of the coxal lines are fine, and although 

 much divergent, are but little prolonged in the outward direction. — D. S. 



1183. Agabus dilatatus, Sol., Gay, Hist. Chil. IV, p. 277. Chili. 



" A. fuscus, margine et capite ochraceiis, postice dilatatus et obtusus, ovatus supvaque obsoletissime 

 punctulatus; protborace medio transverse confuse ochraceo-fasciato ; elytris fuscis luteo-subreticulatis, striis 

 tribus laxe punctatis, obsoletis ; palpis, labro antennisque luteo-pallidis ; pedibus obacuris. Long. 4 lin. 

 •^ ; lat. 2 lin. J. Habita tambien in la republica." 



1 am doubtful to what genus this should be referred ; in the Munich catalogue it is recorded under 

 Agabus, but the trivial name dilatatus is replaced by that of valdiviensis. — D. S. 



1184. Agabus eminens, Kirsch, Berl. Ent. Zeit. XVIT, p. 131. Peru. 



" Ovalis, nitidus, brunneus, prothoracis lateribus elytrorumque macula magna basali, humenim et 



