PLATE XXXYII. 
Drepanosiphum acerina. (Page 185.) 
Fig. 1 . — The young Aphis drawn soon after birth. 
Fig, 2. — The same several days older. As it con- 
tained no forward embryos, probably the pupa would 
have developed from it. The spots scattered over the 
body are due to numerous pink oil globules. 
Fig, 3.' — The winged viviparous female. 
Amphorophora ampullata. (Page 187.) 
Fig. 4. — The apterous viviparous female, showing 
the fiasked-shaped cornicles and the embryos crowding 
the body, even into the cavity of the thorax. 
