:>20 THE CANADIAN ENTOMOLOGIST. 



bronzy shade beyond it, though its course is sometimes indicated by a few 

 yellowish scales. The secondaries are paler than in Necopina, the veins 

 dark, and generally with a discal mark and a submarginal dark shade. 

 Both wings show a double terminal dark line, but naturally this is more 

 evident on the lighter secondaries. 



Fringes of primaries dark, slightly mottled with mauve gray, of 

 secondaries lighter. Beneath, primaries dark brownish gray, lighter 

 towards inner margin, secondaries dark on costal margin and especially 

 at apex, the rest lighter, with a dark discal spot and median line. Both 

 wings more or less powdered as above. Feet brown, fore tarsi marked 

 with whitish. 



Expanse 32 to 43 mm. 



Described from nine specimens, 4 $ and 5 $ , six bred by me between 

 August 24th and September 6th and now in my collection, and three, 

 Nos. 7-9, captured by Mr. Winn on September 10th and 14th, which are 

 in his collection. 



The food-plant of the larva, as already mentioned, is burdock 

 (Arctium Lappa, L.), and the larvae when found were apparently in the 

 penultimate stage. I intended to make a detailed description, but being 

 exceedingly busy, delayed too long, and when I removed them from their 

 burrows for this purpose I found that they were mature, and, as is usual in 

 this genus, the markings had become too obscure for any description to 

 be of value. 



I noticed, however, when I found them that the dorsal and sub- 

 dorsal lines were continuous, thus differing from Rutila, in which only the 

 dorsal line crosses the dark space on the first four abdominal segments, 

 and Necopina, in which not even the dorsal line crosses this space. 



Pupation sometimes took place in the burrows and sometimes not. 



The difference in the pupse of the two species is also marked, as in 

 Necopina there is a frontal tooth-like development, which, as Mr. Bird 

 suggests, appears to be an indication of what occurs in Oc/iria, where a 

 distinct clypeal spur exists, but this is absent in Airata, as I was able to 

 verify through his kindness in sending me some puppe of Necopina for 

 comparison. 



It is perhaps hardly necessary to add that the specific name which I 

 have given is from ceratus — overlaid or covered with bronze — from the 

 prevailing bronzy appearance of the primaries. 



