122 THE CANADIAN ENTOMOLOGIST. 



run parallel to the internal margin : in polygama, they are nearly or 

 entirely united on the submedian, beyond which they widely diverge and 

 again wholly or nearly unite on the internal margin. 



The reniform is broadly surrounded by white : in polygama, narrowly. 

 The sub-reniform is round, its outline denned by black scales ; it touches 

 outwardly the median shade line on vein 2 ; of the two transverse lines, it 

 is nearer to the posterior, or midway between them : in polygama, it is 

 subquadrangular, defined by ferruginous scales, is quite removed from the 

 median shade line, and is nearer to the anterior transverse line, some- 

 times quite approximate to it. 



The subterminal line is dark brown : in polygama, pale gray. The 

 posterior wings have the marginal band slightly narrowed on the median 

 fold : in polygama, it is separated or quite constricted ; beneath, the 

 cellular fold is shaded with black (not in pretiosa). 



In size it is smaller than polygama, five examples of which before me 

 measure in expanse of wings, males t.8o, 1.85 and 1.90 inch; females 2 

 and 2.1 inches. Pretiosa males 1.60 and 1.70 inch ; females 1.80 inch. 

 The wings are proportionally broader than in polygama, they are more 

 clouded with black basally, with more white medially, and with less 

 ferruginous in the terminal region. 



Three examples of the species were captured by me at sugar, at 

 Schenectady, N. Y.,last year — the two males, in perfect condition, on July 

 8th and 10th, and the female, somewhat worn, on July 16th. 



A fine example of C. cratcegi Saunders was also taken by me at sugar, 

 on the 17th of July. I had recognized it as an undescribed species at 

 the time of its capture, and had so indicated it in my collection. With 

 the larval state of nearly all of our Catocalas unknown, it is very gratifying 

 that Mr. Saunders has been so fortunate as to be able to accompany the 

 description of the imago with that of its larva. 



C. polygama was taken but once by me at sugar last season, viz., on 

 the 7th of July, in perfect condition. The examples which I have seen 

 of this species present very little variation. The variability which has 

 been ascribed to it has its existence probably in the confounding with it 

 of cratcegi, pretiosa and perhaps some other species.  



