770 On Aquatic Carnivorous Coleoptera or Dytiscide. 
1271. Copelatus undecimstriatus, Aubé, spec. p. 383. Cayenne. 
“‘Oblongo-ovalis, depressus, brunneo-castaneus; capite et thorace fere undique rufo-ferrugineis ; 
lineolis vix conspicuis in thorace ; elytris in disco striis undecim longitudinalibus alteraque ad marginem 
antice abbreviata utrinque impressis. Long. 43, lat. 22 m.m.” 
(A description follows, l.c., the above diagnosis). 
“Ce Copelatus ressemble, au premier aspect, au decemstriatus, mais outre le nombre des stries des 
élytres qui n’est pas le méme, il en differe encore par la forme de son corselet qui est plus sinueux en 
arriére, la partie mediane de la base s’avangant un peu sur l’écusson, qui par cela méme est plus court que 
dans cette derniére espéce.” 
1272. Coptotomus difficilis, Lec., Ann. Lye. V, p. 204. North America. 
“ Elongatus, utrinque attenuatus, rufus, subtilissime aciculatus, thorace latitudine plus triplo breviore, 
lateribus rectis, apice et basi media nigricante, elytris pallidis, sutura nigra, maculis latis discoidalibus, 
fuscis, margine postice. Long. :28.” 
“Specimen unicum ad Colorado.” 
This is considered by Crotch (Rey. N. Am. Dytisc., p. 413) to be the same as Dytiscus interrogatus 
Fab. (No. 911).—D. 8. 
1273. Coptotomus serripalpus, Say, Trans. Ann. Phil. IV, p. 443. Mexico. 
“Yellowish ; elytra brownish varied with whitish. Body oblong-oval, honey-yellow ; head black on 
the posterior margin ; labial palpi with the penultimate joint crenate or bituberculate before ; thorax on 
the middle of the anterior and posterior margins broadly black ; elytra brownish, with very numerous, 
minute, honey-yellow points ; two very slightly impressed striz, with punctures hardly distinguishable 
from minute inequalities of the surface, and an indistinct part of a series of hardly impressed punctures 
each side ; from the base near the scutel proceeds a whitish broad vitta, one-fifth of the length of the 
elytra, bifid at tip; from the humeral base to the tip proceeds a broad, interrupted and somewhat irregular 
vitta also whitish ; venter piceous. Length less than three-tenths of an inch.” 
Found on the estate of the Conde del Regla, about ten leagues N.H. of the city of Mexico. 
1274. Cybister zneus, Orm., Rev. Zool. 1843, p. 332. South America. 
“ Ovalis, convexus, ad apicem rotundatus, supra sneus infra niger, labro fusco, thoracis lateribus viridi- 
eneis. Elytris limbo viridi-eneis, pedibus anticis fusco-nigris, posticis nigris. Jas. . . . Femina 
elytris levibus. L. 30 1., 16 mill.” 
“Tl differé du C. prosterno-viridis par sa taille plus petite, sa couleur bronzée, et le prosternum qui est 
tout noir. Il habite le Bresil.” 
I cannot identify this species, but think it may prove to be a variety of C. glaucus, No. 1104.—D. 8. 
1275. Cybister auritus, Gerst., Arch. Nat. XX XVII, p. 43. Africa. 
“ Parvus, nigro-piceus, nitidus, supra eneo-micans, antennis, labro, clypei fascia anteriore, prothoracis 
margine laterali testaceis, vel ferrugineis, pedibus anterioribus elytrorumque macula subapicali (interdum 
obsoleta) rufis ; elytris perspicue triseriatis punctatis, tibiarum posticarum calcare externo breviusculo, — 
acute lanceolato. Long. 15$m.m.—17 m.m. Mas et Vem. Var. Fem., elytrorum disco obsolete et minus 
confertim pustuloso.” 
“Zu den kleinsten Arten dey gattung gehorend, nicht grosser als die von Perty C. marginithorax 
