318 INSECT A. 



terminated, 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, are very similar to the preceding ones. 



Bembidiox, Lat, — Bemhidium, Gyll. Dej. 



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

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

 of the two anterior tarsi dilated in the males. 



Messrs Ziegler and Megerle have divided this subgenus into 

 several others(l), but without giving theii: characters, and depend- 

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

 The following species is placed by Count Dejean among his 

 Tachypi. 



B. Jlavipes; Panz. Faun. Insect. Germ. XX, 2j Cicindela fla- 

 vipes, L. Very similar to the Elaphrus riparius; two lines in 

 length; thorax rather narrower than the head, cordiform, trun- 



(1) This subg-enus 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 sliort or but slightly elongated. 



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

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

 than the thorax, form the genus Tachypus 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 Bemhidium properly so called of Dejean. 



The Count, with Megerle, places in the genus Lopha those in v/hich the tho- 

 rax, 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 wider than it is long and proportiona- 

 bly less narrowed posteriorly; its posterior angles always exhibit a strong impres- 

 sion and a little obhque carinaj 



Certain species, whose thorax, although narrowed near the posterior angles, is 

 less tlian in the others, so that the posterior margin is scarcely narrower than the 

 anterior, compose the genus Notaphus, Dej. and Megerle. 



Among those in which the thorax is considerably narrowed behind, its length 

 is sometimes only a little greater than its widtli, and it has tiie form of a truncated 

 heart: sucli are the Perypkus of these naturalists. Sometimes much shorter in 

 proportion, its form approaches that of a cup or of a heart with a very broad base; 

 in some it is even rounded at the posterior angles. They form the genus Leja of 

 the same. The Tachypi, on account of the extraordinary protuberance of their 

 eyes, and other relations to the Elaphri, are sufficiently distinct; but such is far 

 from being the case with the other genera; it is impossible to mark them by rigor- 

 ous characters. Those which might be drawn from the respective and compara- 

 tive length of the second and third joint of the antennae, appear to me to be also 

 uncertain. See the Catal. de la Coll. des Coleop., of Dejean. 



