18 
Psyche 
[March 
of the athalia group-. The preparations as well as the 
facies of 77myi indicate that it does not belong to the same 
specific complex as coreae, as Verity thought, but is instead 
conspecific with another species, M. (A.) ambigua Mene- 
tries. I have figured the male genitalia of mmji (figs. 1 and 
2) and of two specimens of ambigua (figs. 3, 4, 5, and 6) 
to show that they represent the same thing within the 
limits of individual variation. I have not figured the female 
genitalia because I can find no publication where the fe- 
male genitalia of related species of the athalia group have 
been figured or studied other than for group characters as 
a whole. However, my preparations of the female genitalia 
of both yyiayi and ambigua show no real differences. The 
genitalia of coreae, on the other hand, appear to be quite 
distinct from those of ambigua and indeed the male geni- 
talia indicate that this species is extremely close if not 
conspecific with what Verity, l.c., considers to be M. (A.) 
britomartis Assmann. The male genitalia of coreae that 
I have examined agree quite well with those of britomartis 
figured by Petersen (1945) . I must admit that on the basis 
of my studies I strongly doubt the distinctness of coreae 
from britomartis but since I do not have the material 
available to confirm my doubts I must leave the question 
open. Lastly it should be noted that coreae has an earlier 
flight period (late May to the middle of June) than does 
ambigua or its Nearctic representative mayi (late June to 
early August) . 
The synonomy of mayi with ayyibigua provides us with 
a very interesting case of geographical distribution. My 
own examination of specimens and references in the litera- 
ture indicate that ayyibigua ranges from Japan west to the 
Eastern Sayansk Mountains in Siberia and between the 
fourtieth and fiftieth parallels in the north-south direction 
in the Palearctic region. In the Nearctic region its distribu- 
tion is drastically reduced and the only records that I can 
^In this connect ion I should like to thank Dr. F. H. Rindge of the 
American Museum of Natural History, Dr. P. J. Darlington of the 
Museum of Comparative Zoology, Mr. H. K. Clench of the Carnegie 
Museum, and Mr. J. A. G. Rehn of the Academy of Natural Sciences 
of Philadelphia for making it possible for me to examine specimens under 
their care. 
