PLATE CXXIV. 



Phylloxera vastatrtx. (Page 57.) 



Fig. 1. — Winged female containing a pseudo-egg, 

 out of which the male or the female would proceed. 

 The clear space round the ovum represents the rudi- 

 ments of the egg-envelope. This M. Lichtenstein 

 regards as a true pupal covering, and accordingly he 

 calls this winged insect " Pupifer." 



Fig. 2. — A vine leaf, natural size, studded with leaf- 

 galls. These galls have been raised by a previous 

 winged form, which issued from the ground earlier in 

 the year. 



Fig. 3. — Antenna of fig. 1. 



Fig. 4. — Apterous female bred on the root as seen 

 in situ in fig". 5. 



Fig. 5. — Fragment of a larger root of the vine, 

 infested by larvse and their eggs. This is the most 

 destructive form of the pest in Europe. 



A section of one of the above leaf-galls may be seen 

 in the next Plate (fig. 2). 



Prof. C. Riley groups the aerial forms under the 

 head Gallicola, and the subterranean forms under 

 that of lladicicola. 



