174 DACTYLOPIUS HIBERNICTJS. 



EXPLANATION OF THE PLATE. 



PL LXVI, figs. 7, 7 a, 7 b. Antennae of adult female. 



X 150. 



Fig. 8. Tibia and tarsus of adult female. X 150. 

 Fig. 9. Squamose structure on articulation of abdo- 

 minal segments of adult female. X 250. 



DACTYLOPIUS PULVEEAEIUS (STewstead). 

 (PI. LXVI, figs. 4-6.) 



Bipersia pulveraria, Newstead; Ent. Mo. Mag., s.s., 

 vol. iii, p. 145, pi. ii, figs. 7, 7 a-7 c (1892). 



Adult female (fig. 4) very elongate, cylindrical, and 

 narrowed anteriorly ; posterior extremity truncate and 

 slightly emarginate. Colour varying from pale pink to 

 brown. Antennae (figs. 5, 5 a, 55) of six, seven, or 

 eight joints,* usually eight. In all cases the last joint 

 is the longest, and is furnished with two or three stout 

 curved hairs in addition to several long slender hairs ; 

 the remaining joints are also hairy. Legs, like the 

 antennae, extremely short compared with the size of the 

 insect ; digitules to claw gradually dilated ; those of 

 the tarsi ordinary. Men turn rather short ; loop of 

 rostral filaments extremely short, not reaching beyond 

 insertion of the intermediate pair of legs. Anal lobes 

 (fig. 6) indicated by a single long hair surrounded by 

 several spinnerets ; anal orifice (fig. 6) at extremity of 

 body, large, with six long hairs. 



Long, 1-50-4 mm. 



Ovisac. No complete sac is formed, but the female 

 covers herself and her eggs with a very fine white 

 powder, which is of such a dry, fragile nature that on 

 disturbing the insect it almost entirely disappears from 



* The types were described (1. c.) as having the '' antennae of six, some- 

 times seven joints." Having sxibsequently examined a number of individuals 

 free from parasites, I find that the usual number is eight. 



