410 CLASS INSECTA. 



by the sound of footsteps. The form of their legs permits 

 them to dig in the earth, and conceal themselves there. The 

 tarsi can be folded back upon them. It is there also that 

 the larva lives, which the late Mr. Miger was the first to 

 observe. 



H. marginatus, Fab. ejusd. H. Icevigatus, Panz. Faun. 

 Insect. Germ. XXIII. is a small blackish insect, silky, with 

 small yellowish, or reddish spots, of which the number and 

 form vary, and sometimes even disappear on the elytra. 



M, Gyllenhall remarks that the tarsi have really five articu- 

 lations, but that the first is small and oblique. (Insect. Suec. 

 p. 138.) 



The second tribe, that of Macrodactyla, embraces the cla- 

 vicornes, with simple and narrow legs, long tarsi, all com- 

 posed (with the exception of a single sub-genus {Georissus), 

 well distinguished from all the others of this tribe by its 

 antennae of nine articulations, of which the three last form 

 an almost solid knob) of five distinct articulations, the last 

 of which is large, with two strong crotchets at the end. The 

 body is thick or convex. The corslet is less rounded, and 

 terminates most frequently on each side by acute angles. 



This tribe has as a principal type, the genus 



DiiYOPS, of Olivier, 

 Or that of Parnus of Fabricius, which is divided in the 

 following manner : 



1st. — Those whose antennae, never scarcely longer than the 

 head, are composed of from ten to eleven articulations, which, 

 proceeding from the third, form a knob, almost cylindrical, 

 or a little fusiform, arched, and somewhat serrated. 



PoTAMOPHiLus, Gemi. Parnus, Fab., 

 Which, without knowing the establishment of this sub-ge- 

 nus, we have named (Regne Animal III. p. 268.) Hydeiia, 



