HOST INDEX TO CALIFORNIAN COCCIDAE 



E. O. ESSIG AND C. F. TAKER. 



The following index was first roughly compiled from all the publica- 

 tions which we happened to have at hand, and it was then submitted for 

 correction and emendation to Mr. Edw. M. Ehrhorn (Deputy Horticultural 

 Commissioner at San Francisco), Mr. R. S. Woglum (of the U. S. Depart- 

 ment of Agriculture), Mr. E. K. Carnes (Superintendent of State Insec- 

 tary). Prof. T. D. A. Cockerell (of Colorado State University), and Mr. E. 

 R. Sasscer (of the U. S. Department of Agriculture). The index has been 

 completely remodelled in accordance with their notes. But even now it is 

 evidently only a good beginning. Many of our common cultivated plants, 

 some of which at least must often be scale infested, are not yet on the list, 

 while there are beyond doubt many more native species awaiting discovery. 

 We shall be glad to publish all further corrections or additions, since the 

 great value of a complete index of this sort is very evident. We heartily 

 invite all Californian entomologists, horticultural commissioners, and in- 

 spectors, to assist us in the development of this index. It is 

 especially important that we indicate the species which are found 

 only in the greenhouses. Of course, quarantine records are not 

 in reality Californian records at all, though very important as 

 indicating the species which are actually knocking at our doors for admis- 

 sion. It is a splendid justification of our quarantine service, that so many 

 of such records have remained, so far as we know, only quarantine occur- 

 rences. Several specialists have indicated to us that the name Aspidiotiis 

 camelliae should be used in place of Aspidiotiis rapa.v, Dactylopius coccus in 

 p\a.ce oi Coccus cacti, and Pitlvinaria vitis in place of Pulvinaria innnmcrahilis, 

 all of these apparently being changes compelled by priority rules. 



Abies sp,? (Fir). 



Chionaspis pinifoliae. 



Abies concolor (White Fir). 

 Aspidiotus ehrhorni. 

 Leucaspis kelloggi. 

 Physokermes concolor. 



Abies grandis. 



Leucaspis kelloggi. 



Abies magnifica (Red Fir). 

 Leucaspis kelloggi. 



Abies shastensis. 



Leucaspis kelloggi. 



