456 INSECTA. 



Here the anterior edge of the head is always emarginated. The 

 two anterior tarsi of the males are alone manifestly wider, or more 

 dilated than the following ones. 



Pedinus, Lat. 



M. Megerle and count Dejean have divided them into several 

 other subgenera, but without giving their characters. 



Those, where the males have the four first joints of the anterior 

 tarsi of the same width, with the radical triangular, the three follow- 

 ing transversal and almost equal, all the tibiae narrow and elongated, 

 the thorax narrowed posteriorly and terminated by acute angles, 

 form the genus Opatrinus of Count Dejean. 



They all belong to America(l). 



Those, where the same tarsi, and in the same sex have the first 

 joint, and particularly the fourth, sensibly narrower or smaller than 

 the two that are intermediate, and in which the thorax is narrowed 

 near the posterior angles, form four other subgenera, the characters 

 of which are so faint and blended that they may all be united in one, 

 that of Den'darus, Meg. Dej. 



In some species, as in Opatrinus, the tibiae are narrow, elongated, 

 but slightly dilated at their extremity and almost identical in both 

 sexes; and the thorax is abruptly narrowed on each side near the 

 posterior angles, which form a small acute tootlj: they form the 

 Dendari, properly so called(2). 



In the following, the four anterior tibiae, or at least the two first, 

 are dilated triangularly at the extremity. The body is oval. Such 

 is the Heliophilus of Count Dejean. Sometimes the thorax ter- 

 minates insensibly on each side in an acute angle. The body is 

 proportionally shorter and wider. 



Certain species, with a large thorax hardly wider than it is long, 

 with a strong lateral border, and in which the body is but slightly 

 convex above, compose the genus Euryxotus of Kirby(3). 



Others, in which the body is evidently more convex above, and the 

 thorax is transversal and but very slightly bordered, form the Iso- 

 cERUs, Meg. Dej.(4) 



(1) Blaps clathrata, Fab. ; — B. punctata, Fab., and perhaps his Platynotus dila- 

 tatus. 



(2) See Catalogue, Sec, Dej., p. 65, and the Platynotus excavatus, and crenatus. 

 Fab. 



(3) Eurynotus muricatus, Kirb., Lin. Trans., XII, xxii, 1. See Platynotus stri- 

 atus, Schccnh., SjTion. Insect, 1, 1, tab. ii, 6. 



(4) Catalogue, &c., Dej., p. 65. 



