146 SEIEA. 



ligne transversale de meme couleur a son bord poste- 

 rieur. Anus et bord posterieur de I'antepenultieme 

 segment egalement noirs. Antennes, pattes, dessous 

 dn corps et queue d'un jaune-pale tres-leger, les 

 premieres un peu plus foncees et annelees de noir ou 

 de gris ; souvent un anneau noir a I'extremite des 

 cuisses posterieures. 



" Longueur environ 2 millimetres. Se trouve sous 

 les ecorces du Flantanus orientalis ; assez commun en 

 ete ; vit solitaire." 



I found my specimens on the bark of beech, in 

 in company with Psocus, &c., and on dry boards. 



iSeira nigromaculata, Lubbock. 



Grey ; the scales give it a mottled appearance. The 

 eyes are on black patches. There is a dark band 

 running along the side of the body, on the front 

 margin of the mesothorax, and on the posterior edge 

 of the third, fourth, and fifth abdominal segments. 

 The third abdominal segment has also a transverse 

 dark band in the middle, interrupted at the centre. 

 The sixth abdominal segment is black. The legs are 

 annulated ; the antennae iron grey, the segments being 

 paler towards the base. The spring reaches forwards 

 as far as the ventral tube. 



The clubbed hairs are numerous, and give this species 

 somewhat the appearance of/). lanuginosa; in colouring, 

 however, it more closely resembles D. annulata. Indeed 

 the similarity is so great that I have sometimes asked 

 myself whether the presence or absence of scales could 

 be a matter of age or sex. I have not, however, found 

 them together. As regards the markings, these species 

 also curiously resemble young specimens of Orchesella 

 villosa. The markings on the scales are peculiarly bold. 



July. On dry woodwork. 



Length -^^ inch. 



The following species also belong to this genus : — ■ 



