AN 



,. Body of inso n part of moulted skins and 



on of tin- 3. Di IS! 



Sub-Family I. O > 



The sub-family 9 includes tho-e I'occids of which the 



female- undergo the least change in form during their development. 

 The majority of them retain a form not much different from th, ; 

 the young larva- : but in some genera the body become nilar 



:th little or no indication of segmentation. The m<t im- 

 portant character-, as the family is no\v understood, are the multi- 

 articulate labium, and the absence of anal plates. 1'late IV. \<i 



its the typical form of the female adult in this sub-family : i< 

 represents the caudal end of the body of the same. The mo-t coin- 

 exception to this form is that of the genus Kcrrnt's de-cubed 

 \v. In most genera of this sub-family the body of the female 

 mes enclosed in a cottony or felt-like sac. In some, as the 

 mealy-bugs, this takes place just before they begin to oviposit ; 

 while in other genera the greater part of the life of the insei 



ed within the sac. In this and the next sub-family the caudal 

 style of the male is short ; and the last abdominal segment bears a 

 pair of long waxy filaments. Each filament is supported by om 

 more hairs, at the base of which are the spinnerets from which the 

 wax is excreted (Plate IV. I<7 and \b). 



ily-bugs. Dactylopius. The mealy-bugs are the best known 

 members of this sub-family, .is they are 

 the most common and most noxious of 

 green-house pests. Fig. \22 represents 

 J). fangijilis, a common species in i 

 houses. D. dcstrfictvi 23) is an- 



female, en m the 



Aui: for 1880.) 



! 



Icm.i in the 



Au;l for 1880.) 



other common which differs in lacking the long filaments 



