198 THIRTIETH REPORT ON THE STATE MUSEUM. [86] 



behind by a similar row. Thorax with elevated purple-black 

 and orange scales, which are probably, when in perfect condi 

 tion, arranged in transverse rows. Abdomen above black, with 

 white borders to the segments, which increase in width as they 

 recede from the thorax ; a lateral row of black spots ; beneath 

 white. 



Wings white as in boreal is. Primaries with a black basilar 

 spot on the subcostal ; beyond, four black spots in a straight 

 line, of which the superior one, under a magnifier, is shown 

 to be triple and the remaining three, in perfect examples, 

 double. Median band consisting of black, orange and pale 

 ash scales and prominently bordered with shining purplish- 

 Black scales. The band, in the female, is twice as broad on the 

 costa as on the internal margin, and in the male but one-fourth 

 broader costa lly ; twice equally constricted between the median 

 and submedian ; its inner border projected on the subcostal, 

 median and submedian nervures, and slightly on the median 

 fold, on either side of which the excavations are deeper than 

 elsewhere, making the general course of the line a little indi 

 rect ; the outer border projected on the median, median fold 

 and submedian. Subterminal band less sharply excavated 

 on vein 7 than in C. occidentalw ; inner border less enlarged 

 at internal angle than in C. borealis ; outwardly with a black 

 dash before the apex on veins 6, 7, 8 and 9 (the last, costal). 

 Of the usual three lines crossing the wing between the median 

 and subterminal bands, the anterior one is broken and the 

 other two faintly continuous. The terminal intranervular spots 

 are smaller than in cinerea, occidentalis, borealis or multi- 

 scripta. 



Secondaries, without a border, but with traces of an obsolete 

 outer margin near the apex and more distinctly at the inner 

 angle ; a few black scales on the discal cross-vein. 



Beneath, the primaries have a distinct discal spot and are 

 marked on the costa with black spots at the points where the 

 lines of the opposite side commence, which lines are seen in 

 transparency. 



Expanse of wings : $ and ? , 1.60 in. 



Habitat. Canada, Montreal. 



From two examples in the Collections of Mr. C. W. Pearson 

 and Mr. F. B. Caulfield, of Montreal, captured in that city. 

 It is probably quite a rare species. 



This species, which bears a general resemblance to 0. borealis, 



