54 



SCALE INSECTS OF SANTA CRUZ PENINSULA 



In the early adult female the derm is membranous throughout, except 

 for the pygidium. At this stage there may be seen a cluster of numerous 

 ducts at the lateral margin of each of the abdominal segments anterior 

 to the pygidium. The dorsal ducts are very numerous and are arranged 

 as shown in Fig. 31. 



Notes: I am here restoring, at least temporarily, the name Aspidiotus pini 

 Comstock. This has been placed by Cockerell as a synonym of A. abietis (Schr.) 

 but material in my hands, representing both species, indicates that they are possibly 

 distinct. Aspidiotus calif ornicus Coleman is certainly a synonym of A. pini. I 

 shall discuss these species at length in another paper dealing with the conifer- 

 infesting spfcies of this group occurring in North America. 



Aspidiotus rapax Comst. 



Like A. hederce, and frequently in company with it, this species oc- 

 curs on a wide range of hosts. At times it is so abundant on the native 

 shrubs of the genus Ceanothus as to be destructive. 



Aspidiotus shastae Coleman. 



Fig. 32. 



On Sequoia sempervirens, at times in great abundance, always on the 

 leaves. 



Fig. 32. Aspidiotus shastae Coleman : pygidium of specimen from Sequoia semper- 

 virens on the Santa Cruz Peninsula. 



