PLATE CXVII Us. 



Chermes coeticalis. (Page 23.) 



Fig. 1. — Winged viviparous female. 



Fig. 2. — Abnormal wing from the same species, 

 showing a variation in the venation. The 3rd oblique 

 vein has united with the 2nd oblique. The cubitus of 

 the lower wing is very coarse and has become cellular. 



Fig. 3. — Head and antenna of the larva (drawn on 

 Plate CXVII, fig. 6). The minute terminal bristles 

 show an approximation to Coccus. 



Ciieemes pini. (Page 40.) 



Fig. 4. — Larva seated on her pedunculated eggs. 

 Fig. 5. — A similar larva denuded of her woolly coat 

 by its solution in ether. 



Fig. 6. — Antenna of the same insect. 



Thelaxes. 



Fig. 7. — Abnormal upper wing of Thelaxes dryophila. 

 Page 11. 



Fig. 8. — Abnormal upper and lower wings of another 

 example of Thelaxes. Such a complication of veining 

 might be caused by a cross breeding; or otherwise it 

 might show some forward movement in development. 



Fig. 9. — One cornicle or nectary of Thelaxes dryo- 

 />li i In separated from the other organs of the body. d. 

 The mouth is expanded by circular muscular fibres. A 

 long tube from this mouth is carried backwards into 

 the body-cavity, and is lost in the viscera of the insect. 

 Similar organs are seen in situ on Plate E, fig. If. 



Fig. 10. — Portion of the eye of the larva of Thelaxes, 

 showing the rod-like bodies at e, and three simple 

 lenses in advance at /. These rods appear to be 

 arranged differently from those connected with the 

 ordinary faceted eyes of insects. 



