EXPLANATION OF PLATE LI. 



LECANIUM PEESIC/E. (Page 89.) 



Fig. 1 . Insects natural size in situ on peach branch ; 

 1 b, at period of gestation ; 1 a, after parturition. 



Figs. 2, 2 a. Antennas of adult female. X 140. 



Fig. 2 b. Antennae of diseased female. X 140. 



Fig. 3. Leg of adult female. X 140. 



Fig. 4. Dermis from the dorsal region showing 

 faint tesselation and both forms of derm-cells. 

 X 140. 



Fig. 4 a-. The same showing group of large derm- 

 cells above anal lobes. X 140. 



Fig. 5. Dermis at margin with marginal spines. 

 X 140. 



Fig. 6. Spiracle with spinnerets. X 300. 



Fig. 7. Tubular spinnerets of adult female from 

 ventral dermis near the margins. X 600. 



Fig. 8. Spine from ditto. X 600. 



LECANIUM PEKSK^-K, var. COHYLI. (Pages 94, 253.) 



Fig. 9. Insects natural size in xitu on currant 

 branch : 9 a, females at period of gestation ; 9 h, 

 females after parturition ; 9 c 9 scar or mark of 

 secretion left upon the branch after the removal 

 of the insect. 



Fig. 10. Larva shortly before hibernating, with 

 long, iridescent, glassy filaments. X 20. 



