510 



CITRUS FRUITS AND THEIR CULTURE. 



and within two hours are black in this stage, and as 

 dark as they become in the preceding stages. The an- 

 tennae are eleven- jointed, the club being one and one- 

 half times as long as joint number ten. The whole body 

 is furnished with tufts of short black hairs, which are 



Photo by H. A. Gossard. 



Fi.g-. 116. Adult females of the Cottony Cushion Scale (Icerya 

 purchasi Maskell) on myrtle branch, slightly enlarged. 



gathered into a parallel row around the edge of the body. 

 The secretory pores are very numerous, occurring in enor- 

 mous numbers beneath the sides of the body and scat- 

 tered more sparsely over the back. The inner row of 

 tufts on the back is broken at its anal point by a depres- 

 sion, in which is situated a very large pore from which 



