THte CANADIAN ENTOMOLOGIST. 27 



but about a dozen specimens were taken at treacle during 1904, more than 

 had been taken altogether previously. I have never seen any 5 ? which I 

 •have suspected of being this species, which I first recognized three or fi)ur 

 years ago. The description is an excellent one, but as no corresponding 

 description of Ca/^i^afy was ever published, will not serve to distinguish it 

 from that species. And the broken median shade upon which the name 

 is based, though probably characteristic of the species as a whole, cannot 

 be relifd upon even in the ^ $ for the separation of individual specimens. 

 1 have closely examined 64 S 6 ^"d 15 ^ $ oi Ca/gary, and " bluish 

 ash-gray," which fits many of the present species well enough, will not 

 apply to any of the older forms. A few of my dislocata, however, are of 

 that brownish-red tint common in Calgary, but none have the ochreous 

 shade generally present there as well. Dislocata averages a little larger, 

 and as a rule has the transverse lines, including the terminal line on both 

 wings, a little heavier and more clearly defined. The paler markings in 

 the reniform, when they exist, seem to be of a faint yellowish tinge rather 

 , than whitish, as in Calgary. The orbicular is usually but not constantly 

 larger and rounder. The central shade, as mentioned above, seems 

 generally, not always, distinctly broken ; and in at least four of my most 

 obvious (^ Calgary, the break is very pronounced indeed, but it is much 

 more often uninterrupted. The same break is occasionally seen in 

 rosaria. The collar in Calgary is generally a little paler than the rest of 

 the thorax, but in the present species is more often about unicolorous. I 

 may be over-confident, and yet I never felt more sure of a species which I 

 was so incapable of defining. It may be claimed that the inability 

 unjustifies me in condemning the ?. I cannot always recognize the 

 species at a glance, and I have at least two ^ ^ which I am unable to 

 place with certainty. It flies at the same time as Calgary. 



212. N'. oblata, Morr. — Common in some years. Middle June 

 and July. Treacle. Have bred it from larva beaten from Salix in early 

 spring. 



213. N. fennica, Tausch. — Have seen it not uncommon at treacle, 

 but it has been rare of recent years. End June to August. 



214. N. plecta, Linn. Very rare, and I have never taken a perfect 

 specimen. July, at light. 



215. N. collaris, (i. & R. — Rather common at treacle. August. 



216. N. inopinattis. Smith. — Not very common as a rule, though it 

 appeared in some numbers at light and treacle. July and August. 



