770 On Aquatic Carnivorous Coleoptera or DytiscidcB. 



1271. Copelatus undecimstriatus, Aube, spec. p. 383. Cayenne. 



" Oblongo-ovalis, depressiis, brunneo-castancus ; capite et tliorace fere undique rufo-ferrugmeis ; 

 lineolis vix conspicuis in tliorace ; elytris in disco striis undecim longitudinalibus alteraqiie ad marginem 

 antice abbreviata utrinque impressis. Long. 4|, lat. 2| m.m." 



(jl description follows, I.e., the above diagnosis). 



" Ce Copelatus ressemble, au premier aspect, au decemstriatus, mais outre le nombre des stries des 

 glytres qui n'est p;xs le meme, il en differe encore par la forme de son corselet qui est plus sinueux en 

 ai-riere, la partie mediane de la base s'avancjaut un peu sur I'ccusson, qui par cela meme est plus coiirt que 

 dans cette derni^re espece." 



1272. Coptotomus difficilis, Lee, Ann. Lye. V, p. 204. North America. 



" Elongatus, uti-inque attenuatus, rufus, subtilissime aciculatus, tliorace latitudine plus triplo bre^aore, 

 lateribus rectis, apice et basi media uigricaute, elytris pallidis, sutura nigra, maculis latis discoidaliljiis, 

 fuscis, margiue postice. Long. •28." 



"Specimen unicum ad Colorado." 



This is considered by Crotch (Rev. N. Am. Dj-tisc, p. 413) to be the same as Dytiscus interrogatus 

 Fab. (No. 911).— D. S 



1273. Coptotomus serripalpus, Say, Trans. Ann. Pliil. 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 sUghtly impressed strise, 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.E. of the city of Mexico. 



1274. Cybister a;neus, Orm., Rev. Zool. 1843, p. 332. South America. 



" Ovalis, convexus, ad apicem rotundatus, supra seueus infra niger, labro fusco, thoracis lateribus viridi- 

 seneis. ElytrLs limbo viridi-asneis, pedibus auticis fusco-nigris, posticis uigiis. Mas. . . . Femina 

 elytris laevibus. L. 30 1., 16 mill." 



" II difiere du C. prosterno-viridis par sa taille plus petite, sa couleur bronz^e, et le presternum qui est 

 tout noir. II habitc le Bresil." 



I cannot identify this species, but think it may prove to be a variety of C. glaucus, No. 1104. — D. S. 



1275. Cybister auritus, Gerst., Arch. Nat XXXVII, p. 43. Africa. 



" Parvus, nigro-piceus, nitidus, supra teneo-micans, antennis, labro, clypei fascia anteriore, prothoracis 

 marglne laterali testaceis, vel ferrugineis, pedibus anterioribus elytrorumque macula subapicali (interdum 

 obsoleta) rufis ; elytris perspicue triseriatis punctatis, tibiarum posticarum calcare extemo breviusculo, 

 acute lanceolate. Long. 151 m.m. — 17 m.m. Mas et Fern. Var. Fe^/t.jelytrorum disco obsolete et minus 

 confertim pustuloso." 



" Zu den klciusten Arten dev gattung gehorend, nicht grosser als die von Perty C. marginithorax 



