COLEOPTERA, 405 



riorly; the exterior palpi terminate by a sub-oval joint, narrowed 

 into a point at the extremity. The mandibles project but little 

 beyond the labrum. Tarsi identical in both sexes. 



The anterior extremity of the head forms a small snout. The 

 body is plane above, and the thorax trapezoidal, almost as Avide as 

 tlie head, and slightly narrowed posteriorly. 



NoTioPHiLUS Duvier. — Elaphrus, Fab. Oliv. * 



Our second general division of this tribe, or that of the Subulipalpi, 

 is distinguished from the preceding one by the form of the exterior 

 palpi, of which the penultimate and obconical joint is united to the 

 following, forming with it a common oval or fusiform body, termi- 

 nated, either insensibly or suddenly, in a point, or in the manner 

 of an awl. The internal side of the two anterior tibiae is always 

 emarginated. These Insects, both as respects their form and mode 

 of living, arc very similar to the preceding ones. 



Bkmbidion, Lat. — Bembidium, Gyll. Dej. 



Penultimate joint of the exterior palpi large, inflated, and turbi- 

 nated; the last mucli more slender, very short or acicular ; first joint 

 of the two anterior tarsi dilated in the males. 



Messrs. Zieglcr and IMegerle have divided this subgenus into 

 several others f, but without giving their character or depending 

 as it would appear, on the changes in the form of the thorax. 



* Cicimlela aquatica, L. ; Ehtphrus aquaticus, Fab. ; Panz., Faun. Insect. Germ., 

 XX, 3; — Elaphrus bigullatus, Fab., and to which Count Dejeau refers his C. semi- 

 puncfaii'.s. See Spec. II, p. 276, et seq. 



This division, in a natural series, should probably be placed directly after that 

 of the Carabici Quadrumani. In the genus Masoreiis, Dejeau, (p. 420), the two 

 anterior tarsi of the males resemble those of Harpali ; the emargination of the 

 mentum is destitute of a tooth as in Slenolophus, Acupalpus, Sec. ; but the maxillary 

 palpi terminate nearly as in Bemhidiun ; the two last joints are united and form one 

 body, the penultimate merely being rather shorter than the last and obcouical, and 

 the latter, cylindrical and truncated. 



The genera Pogonus and Cardiaderus of Coimt Dejean appear to us to be connected 

 with the Amara of Bonelli, notwithstanding the difference in their tarsi. From 

 what we observe in the Cicindclcta; and the Carabici Grandipalpi, evidently natural 

 divisions, it may be seen that the tarsi vjiry according to the sex, and that if we 

 chiefly depend on characters drawn from these parts, we may form sections, method- 

 ical it is true, but which are in direct opposition to the natural order. 



t This subgenus may be thus divided. In some the thorax is less depressed, is at 

 least as long as it is wide, much narrower posteriorly than before, cordiform and 

 truncated, with the posterior angles very short or but slightly elongated. 



Those in which this part of the body presents no decided impression at its poste- 

 rior angles, and whose eyes are very large, and cause the head to appear wider than 

 the thorax, form the genus Tachijpus of Megerle. 



Those whose eyes, as in all the following divisions, are less prominent, so that 

 the thorax is not wider than the head, but otherwise presenting similar characters, 

 constitute the Bembidium properly so called of Dejean. 



The Count, with Megerle, places in the genus Lopha those ia which the thorax, 

 having the same form and proportions, presents at each posterior angle a marked 

 impression, so that these angles are well bordered. 



The others have a flatter body, the thorax wiJer than it is long, and proportion- 

 ably less narrowed posteriorly ; its posterior angles always esliibit a strong impres- 

 sion, and a little obliqxie carina. 



