298 Report oF THE DEPARTMENT OF ENTOMOLOGY OF THB 
INTRODUCTION. | ' 
The past three years have demonstrated that the San José scale 
will thrive in some of the best nursery and fruit-growing sections 
of the State. This fact, together with its well-known destructive 
powers, makes it an important factor in the business of New 
York nurserymen and fruit-growers. There is, therefore, much 
demand for information concerning this important species. With 
a view to meeting the requirements of the situation, extensive 
series of investigations have been planned bearing upon its devel- 
opment, distribution and control. The present bulletin deals 
principally with the development of females of the late broods. 
The investigations aim to present an exhaustive study of the 
subject and much pains is being taken to work out each phase in 
detail, as it is believed that only by such thorough work can the 
true nature of this as weli as other species be fully understood. 
Such investig»tions should form the basis for practical experi- 
ments havin. .n view the control of such pests. 
As the work was not actively begun until last fall the results 
thus far obtained are necessarily somewhat fragmentary. Fur- 
ther investigations along the same and similar lines are being 
carried on. 
PERIODS OF DEVELOPMENT. 
The Coccide present a marked difference in the development of 
the male and female. The stages preliminary to the mature form 
are well marked in the former, while in the latter they are not. 
After the female larva settles down there is a uniform develop- 
ment with little change except in size. There are, however, at 
least three well defined periods through which both forms pass, 
as follows: 'The period of activity, the period of growth and the 
period of reproduction. The sexes were found to be practically 
| indistinguishable in the early stages, there being no definite rela- 
*With the male the period of reproduction is also a period of activity as ~ 
it flies readily. 
