ERIOCOCCUS DEVOXIEXSIS. 203 



insects are preyed upon by birds before the formation 

 of the ovisac ; otherwise one cannot account for the 

 empty rosettes or other distorted branches which were 

 sent to me. 



Distribution. Not at present known outside the 

 British Isles. 



EXPLANATION OF THE PLATE. 



PI. LXXI, figs. 9-96 (marked ? ). Ovisacs of female 

 natural size in situ on twigs of heath contorted by 

 the insects ; at 9 and 9 a the leaves have been 

 removed in order to reveal the ovisacs ; at 9 b 

 the rosette of leaves, produced by the female, 

 has not been removed, and the position of the 

 ovisac is indicated by the ? . 



Figs. 10, 10ft. Antennae of adult female. X 150. 



Fig. 11. Tarsus and claw of adult female. X 150. 



Fig. 12. Anal segment of adult female, with lobes 

 and anal orifice. X 150. 



Fig. 13. Spines and spinnerets of adult female. 

 X 300. 



G-EXUS G-YMNOCOCCUS (Douglas). 



Adult females naked at gestation, but partly or 

 wholly protected at parturition. Anal lobes * rudi- 

 mentary. Anal orifice with six hairs. Antennae of 

 seven joints. Legs persistent ; tarsi longer than the 

 tibiae. 



Larva with rudimentary anal lobes.* Anal orifice 

 as in the adult female. Dor sum with rows of conical 

 spines. 



Male puparium felted. 



The anal lobes in both the larvae and adult females 



* I described them as " obsolete " (' Ent. Mo. Mag./ s.s., vol. viii, p. 12), 

 but as they are indicated by long setae they are more correctly described as 

 rudimentary. 



