52 



SCALE INSECTS OF SANTA CRUZ PENINSULA 



the dorsal ducts are confined to the pygidium except for a very few along 

 the lateral margins of the abdominal segments. 



Fig. 29. Aspidiotus osborni Ckll. : pygidium of specimen from Quercus agrifolia on 

 the Santa Cruz Peninsula. 



This species is very close to A. ehrhorni, differing chiefly in having 

 the lateral margin of the median lobes more rounded and in not having a 

 series of ducts in the extreme lateral angles of the pygidium. 



Aspidiotus perniciosus Comst. 



Although this species was first described from this area it is not now 

 a serious pest. It is quite frequently met with in old orchards, but has 

 not been found on any native host. 



Aspidiotus pini Comst. 



Figs. 30 and 31. 



1881. Aspidiotus ? pini Comstock, Kept. U. S. Dept. Agric., 1880, p. 306. 

 1894. Aspidiotus abietis (Schr.) ; Ckll., Can. Ent., 26: 190. (Part.) 

 1903. Aspidiotus abietis (Schr.) ; Fernald, Cat. Coccidae, p. 251. (Part.) 

 1903. Aspidiotus calif ornicus Coleman, Jn. N. Y. Ent. Soc., 11 : 64. 

 1903. Aspidiotus able tes Comst; Coleman, Ibid., p. 74. (Misidentification.) 



Abundant on various species of pines and on Pseudotsuga taxi folia. 

 Probably native. 



To the original description of Comstock I have only to add the 

 following notes. 



