THE CANADIAN ENTOMOLOGIST. 15 



a very common species here. Throughout the year I saw but three or 

 four examples. 



In 1884, F. Cardici was remarkably abundant, as it seems to have 

 been all over the Northern States. But in 1885 I scarcely saw one. 



The Argynnids Cybele and Aphrodite were conspicuous tor theri 

 absence in '85 ; so also Phyc. Nycteis and Tharos. For several years P. 

 Ajax and Turnus have been far less common than formerly, though no 

 change has taken place in the abundance of their food-plants. As to 

 Arg. Diana, I have seen but two examples in as many years, and the 

 species is practically extinct here. 



2. As to Food Plants of P. Ajax. 



The only plant known to me is the Pawpaw, Asimina. At the Phila- 

 delphia meeting of the A. A. A. S., 1884, Mr. E. M. Aaron stated that 

 Ajax larvae fed on spice-wood and upland huckleberry ; and in a letter to 

 me subsequently, that of his own knowledge, he knew Ajax would lay 

 eggs on spice-wood, and that the larvae fed both on that plant and 

 sassafras. 



I tried in vain, in 1885, to make these larvae eat either spice-wood or 

 sassafras, giving both to the young just out of egg, and before their taste 

 could have been prejudiced against these plants by having eaten pawpaw. 

 The larvse starved to death, and I could not see that a leaf was even 

 nibbled. I then tried larvae immediately after successive moults to the 

 last, with same result. So that I am satisfied Ajax larvse in this region 

 will not eat the plants spoken of For Tennessee, where Mr. Aaron's 

 observations were made, I do not undertake to speak. The only butterfly 

 larvte which will eat spice-wood and sassafras, so far as I know, are those 

 of P. Troilus and P. Palamedes, and they are restricted to these and 

 allied plants. 



3. Pap. Palamedes. This species has been taken at Glencoe, Ne- 

 braska, as Mr. G. M. Dodge writes me, many degrees farther to the north 

 than has before been observed. 



4. Chionobas Bore, Schn. and Hiibner, 



In the paper on ''' Insects in Arctic Regions,'' the translation of which 

 is printed in Can. Ent., xvii., p. 157, the author, Herr Aurivillius, says : 

 "Let us take as an example Oeneis Bore, Schn., a true hyperborean but- 

 terfly, which has never been found outside the Arctic circle, and even 

 there only occurs in places which bear a truly arctic stamp." In the note 



