330 



THE AMERICAN MONTHLY 



[Oct. 



head is darker than the rest of the body, the eyes are 

 dark purple, and the antennse, legs, and style are smoky. 

 The wings are irridescent with yellow and green. 



Thirty days from birth the females are full grown and 

 the young may be seen witliin their bodies, (fig. 8) each en- 

 closed in a thin membrane. At from thirty-three to forty 

 days the young begin to make their appearance at Wash- 

 ington, D. C, lour full generations being developed in a 



Aspidiotus pernicious . e, adult female removed from scale, showing embryonic young ; d 

 anal plate. 



single summer. It will be seen that they are very pro- 

 lific, a female, it has been estimated, sometimes has as 

 many as 3,216,080,400 descendants in a season, and a 

 single female gives birth to from forty to five hundred 

 and eighty-six in a life-time. We are indebted to the 

 kindness of Mr. L. 0. Howard, U. S. Department of Ag- 

 riculture, Division of Entomology for facts contained in 

 this article. 



