60 Psyche [April 
could not be bred. The fact that none of the broods of nats and 
phalerata gave any specimens of the type of vittata, seems to show, 
that vittata represents a third, entirely distinct, species. In vittata 
both yellow and red specimens are found in both sexes. The black 
spots on the hind wings as well as on the fore wings tend to fuse 
together. Extremes of such forms seem to correspond with A. 
radians Walker. The costal border is always white which serves ~ 
to separate the yellow specimens from A. nais, and the white col- 
lar band is always without black spots which serves to separate 
the red specimens from A. phalerata. The size is slightly above 
that of A. nais, on the average. 
On the suggestion of Dr. Henry Skinner I compared the male 
genital claspers of several individuals of the three species spoken 
of. It was found that in fact A. nais and A. phalerata differ 
widely in the structure of these claspers, and it is not unlikely 
that copulation would be mechanically impossible. The genitalia 
of A. vittata are however very similar to those of A. nais, and it 
would be of interest to attempt hybridization of these two species. 
The fact that Holland’s abundant material came mostly from 
one and the same locality “one little ravine in western Pennsyl- 
vania,’ does certainly not imply that it was all of the same species. 
No less than eight different species of Apantesis, including the 
above spoken of, were found in the immediate neighborhood of 
the Bussey Institution, attracted to light, and fairly abundant. 
Most of these are certainly less variable than often supposed to 
be the case in this genus. 
