PLATE XXXVI* 
Drepanosiphum platanoides. (Page 183.) 
Fig. 1.— Immature form from wMcli eventually the 
pupa is developed. 
Fig. 2.— The pupa studded over with capitate hairs. 
Fig. 3. — The winged viviparous female^ which usually 
carries its cornicles at right angles to the medial line 
of the dorsum, a. Head and antennm of the same. 
h. The upper and lower wings, c. The anal rings^ the 
short tailj and the cornicles of the same. 
Fig. 4.- — The apterous oviparous femaloj showing 
the genital rings dilated into a sac or quasi ovipositor. 
The ova appear nearly ready for extrusion. The 
posterior ends have already commenced to change 
colour, thus indicating that they have been impreg- 
nated. 
