PLATE CXXV. 



Phylloxera vastatrix (gallicola). (Page 57.) 



Fig. 1. — Foundress taken from one of the galls on 

 the leaf, fig. 2 of last Plate. She is larger than the 

 root varieties, and she contains many hundred eggs. 



Fig. 2. — Magnified section of one of the leaf -galls, 

 showing the larvae of several generations surrounded 

 by their ova. 



Fig. 3. — Antenna of foundress fig. 1. 



Phylloxera vastatrix (radioicola). 



Fig. 4. — Larger larva, taken from the root. She 

 contained eight ova only. 



Fig. 5. — A different generation of the same. Taken 

 early in July. 



Fig. 6. — Head and rostum of fig. 4. 



Fig. 7. — Under side of one of the larvae, feeding on 

 the root fibriles. 



Fig. 8. — Claw of the same. These claws fold 

 parallel, one beside the other, so as often to appear as 

 if they were single. 



Fig. 9. — Profile view of larva (after Lichtenstein). 



Fig. 10. — Portion of a vine root, showing how the 

 fibriles become distorted by blebs and swellings. 

 Drawn natural size (after Licht.). 



The true sexes are drawn at PL CXXII, figs. 7 

 and 8. 



The diverse forms taken by these larvae after their 

 moulting is remarkable. 



