EXPLANATION OF PLATE LXVIL 



BJPEKSIA FILICICOLA. (Page 184.) 



Fig. 1. Adult female with cephalic extremity 

 partly hidden beneath the brown epidermal scales 

 of the fern; Triclwmaiiex spicatum, and with 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. Antennas 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. Mentum 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 Trichomanes spicatwn. 



