46 



SCALE INSECTS OF SANTA CRUZ PENINSULA 



This was originally described as an Aulacaspis, but by reason of the 

 scattered dorsal pores of the pygidium it is distinctly a Diaspis. The 

 accompanying figure will supplement the original description. 



Diaspis piricola (Del Guer.). 



Fig. 22. 



Common on pear and prune. The only native host that it is known 

 to attack is the Christmas berry, Heteromeles arbutifolia, upon which it 

 becomes extremely abundant. 



Fig. 22. Diaspis piricola (Del Guer.) : pygidium of specimen from prune on the 

 Santa Cruz Peninsula. 



I have pointed out in the discussion of the genus Diaspis the grounds 

 for rejecting Epidiaspis and restoring this species to the former genus. 

 The only figures of D. pvricola that I have seen are inadequate or even 

 quite misleading, and I present a new figure of the pygidium. 



Genus AULACASPIS Ckll. 



Aulacaspis rosae (Bouche). 



Rather common on roses, cultivated blackberries and raspberries. 



Genus DINASPIS Leonardi. 



I have not been able to see the original description of this genus 

 and am referring one species, Leucaspis kelloggi Coleman, to it upon the 

 suggestion of Mr. E. E. Green. 



