THE ENTOMOLOGIST. 
No. 92.] JULY, MDCCCLXXI. [Price 6d. 
Answers to Correspondents. 
SCALE-INSECTS. 
a. Male scale-insect of the Cactus (Coccus Cacti), the cochineal of 
commerce, magnified, and with wings extended. 6. The same, natural size, 
with the wings closed. c. Female scale insect of the vine (Coccus Vitis). 
d. Female scale-insect of the rose. All these females are represented of the 
natural size. 
The Scale-insect or Mealy-bug.—Two generations of men 
have been born, and most of them have passed away, since 
Rusticus, of Godalming, published his account of the Coccus 
Vitis, the scale-insect or mealy-bug of the vine; and it was 
reprinted, at p. 123 of his collected letters, under my own 
personal superintendence in 1849. Rusticus was by no 
means the first author who had studied these strange insects: 
amongst others I may mention the illustrious Reaumur, who 
had devoted one of his admirable ‘Memoirs’ to its life- 
history exactly a century earlier; and our own Haworth ghas 
given some interesting particulars of its doings, at p. 307 of 
VOL. V. x 
