On Aquatic Carnivorous Coleoptera or Dytiscide. 773 
in medio, antennarum basi thoracis elytrorumque limbo omni anguste rufo-testaceis ; elytris transversim 
subtilissime strigulosis.” 
“Var. (b.) thoracis limbo late ferrugineo-testaceo, vel thorace ferrugineo-testaceo cum fascia transversa 
nigra; elytris in fundo obscure testaceis, lineolis undulatis transversis nigris subtilissime strigulosis, 
margine basali et laterali dilutioribus. Longit. 8} lin. Latit. 43 lin.” 
According to Crotch, “Rev. North Am. Dytis.” p. 406, this is allied to C. paykulli of Europe (No. 
961).—D. 8S. 
1285. Dytiscus anxius, Mann., Bull. Mosc., 1848, II, p. 218. Sitkha. 
“ Oblongo-ovalis, in elytris vix dilatatus, supra nigro piceus, thoracis limbo omni, elytrorum laterali 
corporeque pallide flavis, coxarum posticarum lacintis acuminatis acutis. Long. 13 —1441, lat. 63—7 ln. 
«PD, circumcincto Ahr., Erichson valde affinis sed ratione longitudinis nonnihil angustior elytris apice 
profundius punctatis, et coxarum laciniis minus acutis diversus mihi videtur. 
“ Femina, differt a mare tarsis simplicibus, colore minus nitido, thorace magis plano et elytrorum 
apice fortius punctato.” 
1286. Dytiscus bicolor, Fab., Ent. Syst., I. p. 195. Guinea. 
“ Supra ater elytris striatis, subtus ferrugineus.” 
“ Habitat in Aquapim’ Guinee, Dom. Isert.” 
« Statura omnino D. notati, at paulo minor. Caput et thorax atra, nitida, ore rufo. Elytra striata, 
nigra, immaculata. Corpus cum pedibus ferrugineum.” 
The Munich Catalogue refers this to the genus Copelatus.—D. 8. 
1287. Dytiscus confusus, Motsch., Schrenck, Reise, p. 101, pl. 7, f. 5. Siberia. 
“ Oblongo-ovalis, supra nigro-olivaceus, ore, clypeo, fronte macula triangulari minuta, thoracis limbo, 
elytrorum lateribus, corpore subtus toto pedibusque testaceis ; thorace trapeziforme, angulis posticis 
prominulis, acutis ; coxarum posticarum laciniis acutis, mediocre productis. Fem. elytris levibus. Long. 
11—12 1. lat. 6—64 1.” 
“ Form plus étroite que notre D. marginalis, dont il n’atteint pas la taille, presentant un corselet a 
angles postérieurs plus saillants. I] se trouve dans toute la Sibérie orientale, jusqu ‘au Kamtschatka, et 
a été aussi rapporté du fl, Amour par M. Maack.” 
I think this may possibly prove to be D. circumeinctus (No. 995).—D. 8. 
1288. Dytiscus cordieri, Aubé, spec. p. 108. North America. 
. The type of this species in Chevrolat’s collection (now in the Brussels Museum) is very mutilated, and 
is a peculiar specimen of D. fasciventris, Say ; Aubé’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 
corrected 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 Aub4 which is unknown to me.—D. 5. 
5 G2 
