AOHOEUTBS. . 183 



Bourlet's description of this species is — 

 " 1 mill. Dessus d'un noir mat, dessous d'un brun- 

 gri-satre ; pattes et queue d'un brun-verdatrej oli d'un 

 gris sale ; organe saltatoire fort court, depassant rare- 

 ment le troisieme segment abdominal, et ne paraissant 

 jamais en arriere. — Tres-commune sur les vieux murs 

 en pierres calcaires pendant tout I'hiver." 



The other species of the genus are as follows : 

 Achorutes bielanensis, Waga. 



Achorutes bielanensis, Waga. Soc. Ent. France, vol. xi. 



— — Gervais. His. Ins. Apteres, vol. iii. 



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



" Oinereo-casrulea, albidopilosa, tarsis furcaque albis, 

 antennarum articulo ultimo longitudine trium prece- 

 dentium. 



" Long. 2 mill." 



Hab. Warsaw. 



This species is bluish-black, without eyes, and lives 

 among dead leaves. It may be at once distinguished 

 from the other species of Achorutes by the form of the 

 posterior end of the body. 



On the dorsal surface are a number of pores through 

 which the animal emits, when attacked, a thick, white, 

 bitter fluid, having an odour like that of Podydesmus, 

 or of certain beetles. 



M. Waga observed that the young have no trace of 

 the caudal fork, 



Achorutes humicola, 0. Fabricius. 



Podura humicola, O. Fabricius. Faun. Groenl. 



"P. fusco-cgerulea, antennis brevibus, crassis; corpore 

 cylindraceo versus anum crassiore. 

 " Length •! of an inch." 

 Norway and Greenland. 



