94 LECANIUM PERSIC^. 



EXPLANATION or THE PLATE. 



PL LI, fig. 1. Insects natural size in situ on peach 

 branch ; 1 b, at period of gestation ; 1 a, after par- 

 turition. 



Figs. 2, 2 a. Antennae 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 PERSIC^, var. COEYLI (Linnaeus). 

 (PL LI, figs. 9, 9 a-9 c, 10.) 



.Coccus coryli, Linn. ; Syst. Nat., 740, 10; id., Fauna 



Suecia (1746). 

 ? Lecanium ribis, .Fitch ; Trans. N. Y. State Agr. 



Soc., p. 427 (1856). 

 .Lecanium sarothamni, Douglas; Ent. Mo. Mag., s.s., 



vol. ii, p. 65 (1891). 



Adult female at period of gestation (fig. 9 a) very short 

 ovate, being a little longer than broad, dusky yellow, 

 greenish yellow, or ochreous yellow ; dorsum paler, 

 with eight or nine black transverse bands, arranged as 

 in L. persicx ; but all the bands are much more 

 distinct than in the type, especially those on the 

 cephalic and thoracic areas. 



