44 CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



I. Introduction. 



The Coccidse (Scale Insects) described and identified in 

 this paper were collected by the author in Japan in the 

 summer of 1900, between June 6th and August 25th. This 

 collecting expedition was made partly on behalf of Stanford 

 University, and partly as the personal undertaking of the 

 author. Collections were made on all of the main islands 

 of the Empire, excepting Shikoku; but as the time was 

 limited, only the principal agricultural districts of each 

 island could be visited, although it was sometimes possible 

 to penetrate into the wild forests when situated conve- 

 niently near the railways. The writer was not able to 

 reach several important places in the southern part of 

 Kiushiu Island and in Sanin and Hokurikudo of Hondo 

 (Honshu), nor could Formosa be visited. As special atten- 

 tion was being paid to the distribution of the San Jose 

 Scale in Japan, as well as to collecting generally, it was 

 especially important that most of the time be spent in horti- 

 cultural districts. An examination of the wild lands of the 

 Empire will reveal many species of Coccids not included in 

 this collection. 



In this paper are liste4 seventy-six species collected on 

 this expedition, twenty of which are described as new, 

 while three more are described as new varieties. These 

 new species and varieties are described under the following 

 names: — 



Monofhlehus corj)ulentus, 



Sasakia quercus. 



Kermes nakagatvce. 



Kermes nawcB. 



Eriococcus japonicus. 



Rhizococcus onukii. 



Dactylopms conistocki. 



Dacty logins pini. 



Dactylopiiis kraunhicB. 



Pulvinaria horii. 



Pulvinaria oyamce. 



