32 SIGNORETIA LUZUL^. 



EXPLANATION OF THE PLATE. 



PI. XL, fig. 1. Insects natural size in xitu on a plant 

 of Luzula campestris : $ indicates females imme- 

 diately prior to the formation of the ovisac ; 

 $ s = female sacs ; and g 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. Antennas 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. 



GENUS LICHTENSIA (Signoret). 



Adult female (PI. XLI, fig. 3) naked and more or 

 less active up to the period of parturition, when it 

 much resembles certain forms of Lecanium hesperidn.m. 

 Immediately before parturition the female envelopes 

 herself, except at the cephalic extremity, in a dense 

 white felted sac (PL XLI, fig. 1). Antennas and legs 

 well-developed. 



Male (PL XLI, fig. 7) with two long white caudal 

 filaments. Ocelli, four ventral and four dorsal. 



Male puparium (PL XLI, fig. 11) glassy, with the 

 " coronet" bifurcate at the posterior extremity. 



This genus comes very near to the preceding in the 

 structural details of the adult female, and also in the 



