THE CANADIAN ENTOMOLOGIST 175 



After repeated observation and comparison of these 83 specimens, I 

 feel no particular hesitation in declaring that the 42 luimtce are all females, 

 the 24 Sauiidcrsii ^nd the 17 edusce all males. 



Examination of the three series above mentioned appears to make 

 evident the following results : 



First — That the specimens do easi/y distribute into said three sets. 



Second — That in general appearance the Saundersii and cdusa series 

 would be almost or quite indistinguishable but for the fullness of white on 

 margin spaces of latter form, which constitutes so conspicuous a 

 distinction. 



Third — From the other two series that of htiiata not only differs in 

 lacking the white decoration, but is also different in the tone, the hue and 

 depth of the diffused shades of color on the wings ; so that lunata differs 

 from the other two markedly more than those differ from each other. 



Fourth — Aside from mere color and shading, the definite markings are 

 alike in the three series. Upon the basis of the characteristic lines alone, 

 tone not taken into account, it would be safe to say that if there are two 

 or more species within the limits of the entire set of specimens, then the 

 same two or more species can also be found in each of the three series as 

 above arranged ; that is, there is as much essential variation in either series 

 as between any two series, or very nearly as much. 



Fifth — By superior robustness of body, and especially greater fullness 

 of abdomen at post-median region, as also in regard to antennae, the 

 specimens in lunata series differ strikingly from those of the Saundersii 

 and ediisa series. From these characters, with the difference of tone and 

 absence of white clouding, I conclude that there is a valid distinction of the 

 lunata set from the other two. 



This distinction of lunata from the others must be either of species or 

 of sex. As the Samidersii and edusa series differ unimportantly, by 

 presence of a little white or much white, a distinction which alone is not 

 valid either for a difference of species or sex, and as these seem to be males ; 

 as, furthermore, the lunatce do validly differ from the others for species or 

 else for sex, and these seem to be females ; and as, finally, the three sets are 

 alike in the definite lines important as criteria of specific difference — I 

 therefore conclude Saundersii and edusa two male forms, and lunata the 

 female form of one and the same species. 



