ASTEKOLECANIUM VARIOLOSUM. 161 



EXPLANATION OF THE PLATES. 



PL D, Vol. I, fig. 2. Photograph of five oak branchlets 



with the insects in situ. 

 PL LXI, fig. 9. Insects natural size in situ on oak 



branchlet. 



Fig. 10. Three ovisacs of adult female in situ, x 4. 

 Fig. 11. Ovisac of adult female at the period when 



the female entirely fills it (dorsal), x 20. 

 Fig. 12. Underside of the same showing the four 



respiratory channels filled with a white waxy 



secretion. X 20. 

 Fig. 13. Ovisac of adult female after the death of 



the insect, the desiccated body of which is indi- 

 cated by the brown colour of the anterior portion 



of the test. X 20. 

 Fig. 14. Secretionary covering of the second-stage 



female. X 25. 

 Fig. 15. Marginal fringe of the same, highly 



magnified. 

 PL LXII, fig. 1. Adult female after treatment with 



potash (ventral). X 35. 

 Fig. 2. Abdominal extremity of the adult female. 



X 140. 

 Figs. 3, 3 a. Marginal compound or figure-of-8 



spinnerets of adult female. X 600. 

 Fig. 4. Dorsal tubular spinnerets of adult female. 



X 600. 

 Fig. 4. Dorsal compound figure-of-8 spinnerets. 



X 600. 



Fig. 5. Anal orifice of adult female. X 600. 

 Fig. 5 a. Rudimentary antenna of adult female. 



X 600. 



[ASTEROLECANIUM ORCHIDEAEUM (Westwood). 



In the * Gardener's Chronicle ' of 20th December, 

 1879, Prof. Westwood described an insect under the 



VOL. II. 11 



