﻿296 POMONA COLLEGE JOURNAL OF ENTOMOLOGY 



the development, there is a gradual acquisition of the white powdery covering, 

 which completely covers the adult female. 



Adult (Figs. 113 and 114). The adult mealy bug. as its name suggests, 

 is completely covered with a thick, white, cottony wax. The body segmenta- 

 tion is distinctly visible through this covering, though the latter completely 

 hides the body color. On the ventral surface the covering is very thin or 

 wanting. At the margins the waxy-covering extends outwardly in the form 

 of white filaments or ])lates. There are 17 lateral filaments on each side. 



Figure 113. Adult females and egg masses of Pseudococcus citri. 

 (Pom. .loiini. Kilt.. V(il. I, No. 2. Fig. :'.l.) 



At the posterior end there are 2 long filaments, nearly one-fourth the length 

 of the body, and several shorter filaments extending backward. From every 

 lateral spine group or large spine there arises a filament, liy counting these 

 we find 34 lateral filaments on the same number of small spine areas, which 

 comprise 2 short spines each. 2 long posterior spines arising from the spines 

 on the anal lobes, 2 short filaments arising from the short spines on the anal 

 lobes, and 6 filaments arising from the six circumanal spines. The average 

 length of the adult female is 3 mm., and the average width is 1.5 mm. Some 

 are much larger. A brown mid-dorsal longitudinal band is a common char- 

 acteristic of the adults. 



