heterocera occurring in britain and japan. 231 



Bombycid^;. 



Bombyx neustria, Linn. — Variable as in England. 



Odonestis potatoria, Linn. — This species occurs in the 

 typical form in Japan, where there are also modifications 

 leading up to the extreme form albomaculata, Brem. 



Lasiocampa (= Gastropacha) quercifolia, Linn. — The 

 Japanese specimens most nearly approach the form alnifolia, 

 Ochs. 



L. ilicifolia, Linn. — The Japanese form (var. japonica, 

 Leech) is pale reddish-brown, with well-defined white markings, 

 which are tinged with violet. 



DlCRANURIDiE. 



Dicranura (= Cerura) furcula, Linn. 



D. bifida, Hiibn. — Represented in Japan by D. (C.) lanigera, 

 Butl. 



D. vinula, Linn. (=felinia, Butl.). 

 Stauropus fagi, Linn. (= persimilis, Butl.). 



NoTODONTIDjE. 



Ptilophora plumigera, Esp. 



Pterostoma palpina, Linn. — Japanese specimens are larger 

 than British. 



Lophopteryx camelina, Linn. 



NOTODONTA BICOLOR, Schiff. 



N. chaonia, Hiibn. 



N. TRIMACULA, Esp. 



Pyg^erid^. 

 Clostera anachoreta, Fabr. 



Cymatophorid^;. 



Gnophora derasa, Linn. (== derasoides, Butl.). 



Thyatira batis, Treit. 



Cymatophora duplaris, Linn. 



Note. — Heterogenea uncula, Staud., described from Amurland, 

 is found in Japan; and Pcecilocampa subpurpurea, Butl., seems 

 confined to Japan. There are seven species of Saturniidae in the 

 islands ; but, with the exception of Aglaia tan, Linn., all are East 

 Asian species. Of the genus Phalera Japan has four species, one 

 of which, P. fuscescens, Butl., represents P. bucephala, L., but it 

 has dark hind wings, and a larger apical spot or patch. There 

 are six species of Drepana ; but only one of these is European, 

 i. e., D. curvulata, Bork., which does not occur in Britain. 



