EXPLANATION OF PLATE XL. 



SIGNORETIA LUZUL.E. (Page 27.) 



Fig. 1. Insects natural size in situ on a plant of 

 Luzula campestris : ? indicates females imme- 

 diately prior to the formation of the ovisac; 

 ? s = female sacs ; and <$ = male pnparia on 

 under side of leaf. 



Fig. 2. Second stage female. X 15. 



Fig. 3. Adult female after treatment with potash. 

 x 15. 



Figs. 4, 4 a. Antennae of adult female, x 140. 



Fig. 5. Tibia and tarsus of adult female, x 140. 



Fig. 6. Anal ring of adult female with the basal 

 retractile sac fully extended and the anal lobes 

 diverted. X 140. 



Fig. 7. Stigmatic spines and spinnerets, x 300. 



Fig. 8. Male, x 30. 



Fig. 9. Antenna of the male. X 70. 



Fig. 10. Leg of the male, x 70. 



Fig. 11. Second- stage male, x 35. 



Fig. 12. Puparia of the male, x 20. 



