THE CANADIAN ENTOMOLOGIST. 33 



segments. Twelfth segment with two scarcely raised black tubercles 

 above, a short black streak on each side behind them, and a small whitish 

 spot in front ; terminal segment with a few very fine short brownish hairs. 

 Spiracles small sub-oval, pale ringed with black. 



Under surface similar to the upper, with the greenish tint a little more 

 decided and a central stripe of greenish white widening between the two 

 pairs of prolegs ; each segment from fifth to ninth has several small black 

 dots. Feet yellowish green, faintly ringed with black at their base; pro- 

 legs green, marked with reddish brown on the outside. 



Two specimens entered the chrysalis state on the 25th of June ; one 

 produced the imago on the 9th *of July, the other on the 12th. The 

 moth was kindly determined for me by Dr. A. S. Packard, Salem, ]\Iass. 



A DISSERTATION ON NORTHERN BUTTERFLIES. 



BY WILLIAM COUPER, MONTREAL. 



The Swallow-tail Butterflies which occur on the Islands of Anticosti 

 and Newfoundland, and on the north coast of the Gulf of St. Lawrence 

 -are at present a subject of dispute, both as to species and position among 

 the Papilionidae. Having some knowledge of their localities and geo- 

 graphical range, I venture to state my opinion on the matter. 



When I first visited the south coast of Labrador, in 1867, a Swallow- 

 tail butterfly was taken by me at Natashquan, where it was rare. I 

 supposed it then to be a boreal variety or race of Asferias, and on my 

 return to Quebec presented two or three specimens to the Rev. Mr. Innes, 

 who had a collection of Lepidoptera among which were specimens of a 

 smaller Papilio, which he informed me came from St. John's Newfound- 

 land. Mr. Innes removed afterwards to London, Ont., and I heard no 

 more of the Labrador or Newfoundland Papilios until i\Ir. W . Saunders 

 described his Papilio brrcicauda in " Packard's Guide." Mr. Saunders 

 obtained his specimen through the kindness of Mr. Innes, who told him 

 that he had received it from an ofticer who had been spending some time 

 at St. John's. If the Papilios taken by me at Natashquan, Labrador were 

 in Mr. Innes' cabinet when Mr. S. obtained the specimen described as 

 brcvicauda, did Mr. Innes point them out to Mr. S. in order to compare 

 with those from Newfoundland ? This primary question should be 

 answered, because there is no evident difference between the Papilio of 



