750 On Aquatic Carnivorous Colcoj^itera or DtjtiscidcB. 



transversim in medio luteo ; elytris nigris, inaculis luinimis in-egulariter rotundatis imdique luteo-omatis, 

 et fascia nigra confusissima ulti-a medium transversim notatis. Long. 12 m.m., larg. 6| m.m. " 



[Succeeded hy a description.] 



A single individual in the collection of Castlenau, who received it fi-om Brazil. The species is probably 

 closely allied to A ornaticollis (No. 1059). — D. S. 



1175. Acilius laticinctus, Lee, Ann. Lye. V. p. 203. North America. 



" Fere ellipticus minus convexus, ferrugineus, supra nigro-piceus nitidus, thorace latitudine triple 

 breviore, lateribus late fasciaque transversa angiista luteis, elj^tris margine lato nigro-irrorato, fascia 

 subbasali, (sKpius interrupta) apiceque luteis, ore, epistomato, macula vertical! transversa, pedibusque 

 anterioribus flavo testaceis. Long. 45. Femina, thoracis lateribus rugosis, elytris vereus basin striolis 

 a]iproximatis strigosis. Ad flumen Colorado, et Vallecitas frequens. A. inciso simUis." 



A male individual of this species recently communicated to me by Dr. Leconte seems to be structurally 

 very closely allied to Dytiscus basUaris (No. 1071); and it must remain at pi-esent an open question 

 whether it be a distinct species ; if not it is at any rate the most extreme variation I have seen of D. 

 basilaris. — D. S. 



1176. AcLLius maculatus, Aubd, spec. p. 141. Mexico. 



" Ovalis, paulo ellipticus, convexiusculus, supra nigro-cinereus, infra testaceus, thorace luteo, antice et 

 postice in medio nigro ; elytris luteis, punctis minimis confluentibus, fascia transversa ultra medium, 

 maculaque ad apicem confuse nigro-omatis." 



" Mas : elytris hevibus. Femina : ad basin lineolia brevissimis punctiformibus impressis ; thorace 

 loevi. Long. 12 — 12^ m.m., larg. 7 — 7i m.m." 



[A description follows. I.e., the ahove.^ 



Tliis is placed by Aub6 near A. ornaticollis (No. 1059), to which it is probably similar. — D, S. 



1177. Acilius subirapressus, Motsch., Bull Mosc, 1845, I. p. 30. Kamtschatka. 



" Acilius subimpressus m. du Kamtschatka, ressemble aussi a I'esp^ce de Sitka, mais il s'en distingue 

 par les couleurs du dessous du corps." 



I do not think the above can be considered a " description," however wide be the extension anyone 

 may be inclined to claim for that term. — D. S. 



1178. AcUius tomentosus, Motsch., Bull. Mosc, 1845, I. ]). 30. Russia. 



" Acilius tomentosus, m. C'est une esp6ce des environs de St. Petersbourg qui ressemble beaucoup a, 

 lA. sulcatus L., mais qui est constamment plus petite." 



These few words do not constitute a description, and are moreover perfectly applicable to the well 

 known European Dytiscus fasciatus, (No. 1053). — D. S. 



1179. Agabus amosnus, Solsk., Fedt. Turk., II, 5. p. 142, Urgut. Turkestan. 



" Ovalis, apice utrinque subacuminato-rotundatus, subconvexus, glaber, nitidus ; piceo-niger, ore, 

 antennis, vertice maculis duabus, pedibus segm enter umque abdomiualium marginibus ferrugineis, pedi- 

 bus posticis fusco-maculatis ; capite thoraceque nigro-seneis, virescentibus, hoc lateribus late testaceis ; 

 elytris fusco-testaceis, basi lateribusque dilutioribus." 



