The relationship between the palaearctic and nearctic faunas 



239 



FIG. 31. Distribution of Plusia (Autographa) 

 parilis Hbn., a "Westarctic" moth. The fig- 

 ured specimen is from Scandinavia. 



(Photo P. Ardo.) 



atlantic species (according to the size of gap on both sides of the Pacific; groups 

 A-C above) on the one hand, into northern, arctic, boreo-alpine, &c., Amphiatlantic 

 species on the other. 



Westarctic animals are much fewer in number than plants are. Some of the more 

 pronounced were enumerated above (p. 231) (and marked with a "W"). According 

 to the definition, that is with allowance for an occurrence in eastern Siberia, the 

 following are also instances of Westarctic distribution: — 



Lepidoptera 



Anarta fiinebris , Hbn. 

 A. melaleuca Thunb. 

 A. zetterstedti Stgr. 



Anomogyna laetabilis Zett. 

 Arctia quenseli Payk. 

 Cidaria sabini Kby. 



