DACTYLOPIUS HIBEENICUS. 173 



in the latter the eighth joint is much the longest ; the 

 rest are of nearly equal length ; formula 8, 2, 1, 3 

 (4, 5, 6, 7). Legs longer than the antennas ; tarsus 

 (fig. 8) about one third the length of the tibia3 ; 

 digitules ordinary. Mentum rather short, rounded, 

 and with several hairs at the apex. Anal lobes rather 

 pronounced, with several short spines and hairs, and a 

 single long hair. Dermis at the articulations of the 

 segments with lineal squamose structures (fig. 9), 

 which are very distinct in stained specimens. 



Long, 25 mm. ; wide, *25 3 mm. 



Ovisac formed in the " crowns " of the food-plant, 

 at first very loose and cottony, but old examples 

 become more felted ; it is at all times extremely thin 

 and fragile, and as it has invariably been found 

 attached to two or more leaves its true form has not 

 been traceable. 



Ova pale flesh-coloured at first, but changing to 

 reddish-pink. 



Habitat. In the " crowns " of various grasses, and 

 of the sea-pink (Armeria vulgaris, Wild). The types of 

 D. Mbcrnicus were discovered by Miss Tomlin in 

 September, 1893, on a chalk cliff close to the sea, at 

 Ballintoy, co. Antrim, Ireland. I found it sparingly on 

 the Island of St. Seiriol,* or Puffin Island, Anglesey, 

 in 1895 ; and fairly common, but rarely perfect, on the 

 marshes of Ingoldisthorpe and Snettisham, in Norfolk. 

 I have also quite recently taken it in the Western 

 Hebrides, including St. Kilda ; but so far as I was able 

 to trace, it seems scarce, as I only obtained a few 

 isolated examples. 



Distribution. Not recorded outside the British 

 Isles. 



* These specimens were described under the name Dactylopius radicum 

 (1. c.). The characters which were then considered distinct were the 

 " curiously shaped pores or glands," and the seven-jointed antennae of the 

 adult female. I now find that the former are evidently the work of a 

 parasite; and further that individuals occur with seven to eight joints 

 to the antenna?. I have, therefore, sunk the species, and referred the 

 immature examples found on the roots of the above plants to Bipersia 

 lialophila. 



