On Aquatic Carnivorous Coleoptcra or Dytiscidce. 773 



ill inediOj anteiiiiaiiim Lnsi thoracis elytvorunique limbo omni anguste rufo-testaceis ; elytris trans\ersiiii 

 subtilissime strigulosis." 



" Var. (6.) thoracis limbo late feri-ugineo-testaceo, vel thorace fernigineo-testaceo cum fascia transversa 

 nigra ; elytris in fundo obscure testaceis, lineolis undulatis transversis nigris subtilissime strigulosis, 

 margine basali et laterali dilutioribus. Lougit. 8^ lin. Latit. 4^ lin." 



According to Crotch, " Eev. North Am. Dytis." p. 406, this is allied to C. paykulli of Europe (No. 

 961).— D. S. 



1285. Dytiscus anxius, Mann., Bull. Mosc, 1843, II, p. 218. Sitklia. 



" Oblongo-ovalis, in elytris vix dilatatus, supra nigro piceus, thoracis limbo omni, elytroium lateral! 

 corpoi-eque pallida flavis, coxarum posticarum laoiniis acuminatis acutis. Long. 13 — 14^ 1., lat. 6g — 7 lin. 



'• D. circumciucto Ahr., Erichson valde affinis sed ratione longitudinis nonnihil angustior elytris apice 

 profundius punctatis, et coxarum laciniis minus acutis diversus mihi videtur. 



" Femina, diffei-t a mare tarsis simplicibus, colore minus nitido, thorace magis piano et elytrorum 

 apice fortius pimctato." 



1286. Dytiscus bicolor. Fab., Ent. Syst., I. p. 195. Guinea. 



" Supra ater elytris striatis, subtus ferrugineus." 

 "Habitat in Aquapim'GiiineEe, Dom. Isert." 



" Statura omnino D. notati, at paulo minor. Caput et thorax atra, nitida, ore rufo. Elytra striata, 

 nigra, immaculata. Coipus cum pedibus ferrugineum." 



The Munich Catalogue refers this to the genus Copelatus. — D. S. 



1287. Dytiscus confusus, Motsoh., Schrenck, Reise, p. 101, pi. 7, f. 5. Siberia. 



" Oblongo-ovalis, supra nigi-o-olivaceus, ore, clypeo, fronte macula triangulari minuta, thoracis limbo, 

 elytrorum lateribus, corpore subtus toto pedibusque testaceis ; thorace trapeziforme, angulis posticis 

 prorainulis, acutis ; coxarum posticarum laciniis acutis, mediocre productis. Fern, elytris Isevibus. Lon". 

 11— 12 1. lat. 6— 6J1." 



" Form plus ctroite que notre D. marginalis, dont il n'atteint pas la taille, presentant un corselet a 

 angles post^rieurs plus saillants. II se trouve dans toute la Siberie orientale, jusqu 'au Kamtschatka, et 

 a ete aussi rapportc du fl. Amour par M. Maaok." 



I think this may possibly prove to be D. circumcinctus (No. 995). — D. S. 



1288. Dytiscus cordieri, Aube, spec. p. 108. North America. 



The type of this species in Chevrolat's collection (now m the Brussels Museum) is very mutilated, and 

 is a peculiar specimen of D. fasciventris, Say ; Aube's description does not agree well with this individual, 

 or with any other species, and I think it must have been made from this individual and supplemented or 

 c -irrected from another species so that I do not reproduce it. 



1289. Dytiscus extenuans, Walk., Ann. Nat. Hist. 3rd ser. II, 1858, p. 204. Ceylon. 



" Mas, Ater nitidus, capitis margine antico et thoracis lateribus luteis, elytris vitta submarginali postice 

 attenuata et apices non attingente. Long. 8, lin." 



According to the type in the British Museum, this is a small species of Cybister ; it may possibly be 

 C. dejeani Aub'? which is unknown to me. — D. S. 



S G 2 



