182 ACHORUTES, 



On a hotbed and under branches of trees, throughout 

 the year. 



I was at first disposed to refer this species to the 

 A. armatus of Nicolet. It difi'ers, however, in the 

 colour of the body, and in the absence of brown spots 

 on the back. Moreover, if I have been right in 

 identifying the preceding species with the A. armatus 

 (Foclura armata) of Nicolet, it differs from the present 

 in having larger abdominal hooks, and in the form of 

 the caudal appendage, as may at once be seen by 

 comparing PI. LXIII, fig. 6, which represents the 

 caudal appendage of A. armatus, with fig. 8 of the 

 same plate, in which I have figured the corresponding 

 organ of A. purinirescens. Again, in the present 

 species the eye is not on a black patch. 



The antennse are short, and composed of four seg- 

 ments ; the articulations are somewhat oblique ; and 

 the two terminal segments form a sort of club. The 

 mandibles have respectively four and five teeth. The 

 skin of the body, as well as of the appendages, is 

 granular, and covered with short, scattered, smooth, 

 white hairs. 



The anterior feet have two or three long tenent 

 hairs, which, however, are but little swollen at the 

 extremity. The large claw bears a single tooth on the 

 underside ; the small claw is of somewhat peculiar 

 form, and terminates in a filament. The second and 

 third pair of feet differ from the first principally in 

 having three tenent hairs, which, moreover, seemed 

 to me to be more enlarged at the tip than those of the 

 anterior feet. 



The caudal appendage is simple and 2-jointed. 



Achorutes murorum, Bourlet. 



Hypogastrura murorum, Bourlet. Mem. Soc. Roy. Douai, 1842. 

 Achorutes — Gervais. His. Ins. Apt., vol. iii, 



— — Nicolet. Ami. Soc. Ent. France, 1847. 



— — Lubbock. Trans. Linn. Soc, 1867. 



— — Tullberg. Skand. Podur. 



