186 RIPERSIA FILICICOLA. 



EXPLANATION OF THE PLATE. 



Fig. 1. Adult female with cephalic extremity 

 partly hidden beneath the brown epidermal scales 

 of the fern, and ivith the glassy filaments at the 

 sides, which are secreted before the formation of 

 the ovisac. X 15. 



Fig. 2. Adult female after treatment with potash 

 (ventral). X 20. 



Figs. 3, 3 a. Antennae of adult female. X 250. 



Fig. 4. Anal extremity of adult female (ventral). 

 X 140. 



Fig. 4 a. Anal lobe of adult female (dorsal). X 140. 



Fig. 5. Dermis at cephalic extremity. X 250. 



Fig. 6. Men turn of adult female. X 140. 



Fig. 7. Tarsus of adult female. X 250. 



Fig. 8. Spiracle of adult female. X 250. 



Fig. 9. Early stage of the ovisac of the adult female 

 with portions removed, revealing the female within. 

 X 120. 



Fig. 10. Pupa (? second stage). X circa 40. 



Fig. 11. Puparium of male. X circa 30. 



Fig. 12. Insects (ovisacs and puparia) natural size 

 in situ on frond of TricJiomanes spicatum. 



BIPERSIA TOMLINII (Newstead). 

 (PL LXVIII, figs. 1-10.) 



Ripersia tomlinii, Newstead; Ent. Mo. Mag., s.s., 

 vol. iii, p. 146, pi. ii, figs. 6, 6 a-6 c (1892) ; s.s., 

 vol. iv, p. 77 (1893). 



Adult female dull orange-yello \v, farinose. Form, 

 after restoration with potash, elongate-ovate. Antennas 

 (figs. 2, 2 a), of which there are two distinct forms, of 

 seven joints ; in fig. 2 the third joint is the longest, 

 and the articulation of the sixth and seventh is faint, 



