D 



ecember, 



1920] 



The Canadian Field-Naturalist 



173 



usually ebracteate, and so can be distinguished with 

 tolerable certainty from the other two, on whose 

 scapes there are always bracts. 



Rose Pogonia, Pogonia ophioglossoides (L.) Ker. 

 This delicately coloured orchid although known to 

 have been found in the large swamp near Beebe as 

 already mentioned, was not in bloom when we visited 

 it on June 24, but I was fortunate to secure it on 

 my second visit on July 10, although even then it 

 could hardly be said to be fully out, although its 



companion Calopogon pulchellus apparently was. 

 Both these species were found principally on the 

 outskirts of the little bog at the far end of the 

 swamp where the Small Cranberry, Vaccinium Ox\)- 

 coccos, grew in profusion. Of Pogonia, only about 

 a dozen or more plants were in bloom, whilst of 

 Calopogon, there were probably about three times 

 as many, so the station apparently is not a large one 

 for either species. 



FURTHER NOTES ON THE RHOPALOCERA OR BUTTERFLIES OF 



HATLEY. STANSTEAD COUNTY, QUEBEC. 1920. 



By H. Mousley. 



After a storm there usually comes a calm, and so 

 after a year of plenty there usually follows one of 

 scarcity, at least I have generally found it so with 

 the butterflies, and this year has certainly proved 

 no exception to the rule. 



Reverting for a moment to my previous paper 

 in "The Canadian Field-Naturalist," Vol. 

 XXXIV, 1920, No. 1, pp. 7-10, it will be found 

 that the species there recorded for Hatley numbered 

 forty-five. To this total can now be added another 

 three, the Mountain Silver-spot (Arg^nnis atlantis), 

 the Brown Elfin (Incisalia augustus), and the Coral 

 Hairstreak (Slrymon I'llus) which latter I find has 

 been taken by Mr. George A. Moore at North 

 Hatley. See "A Preliminary List of the Insects of 

 the Province of Quebec," A. F. Winn, 1912, p. 15. 



At first sight this result may appear a very poor 

 one, but in reality it is about as much as can now 

 be expected in any one season, the time having ar- 

 rived (the same as with the orchids) when it is going 

 to be a matter of much difficulty to add to one's 

 laurels, the final goal having been about reached in 

 both cases. As regards the Mountain Silver-spot it 

 could without doubt have been added to my list long 

 ago had not other interests taken up all my time, and 

 prevented me from paying more attention to the 

 genus Argynnis, a difficult one, and of which atlan- 

 tis is a member. It occurred in some numbers near 

 Mount Orford about eighteen miles to the northwest 

 of Hatley during the present season (1920) so Mr. 

 Winn tells me, and to whom I am indebted for speci- 

 mens, which enabled me to see that a few examples 

 I had placed on one side as doubtful aphrodite were 

 in reality atlantis. The little Brown Elfin I first 

 came across on June 8, when visiting the great 

 Brule Bog near Waterville, some thousand acres in 

 extent, and judging from its worn condition on that 



date, it must have been on the wing for about a 

 fortnight. The next time it was met with was on 

 June 20, when visiting another small beg (for the 

 first time) two miles to the north of the village, and 

 then again four days later it was found in a large 

 swamp near Beebe, a village some fifteen miles to 

 the southwest of Hatley, so that this little Hairstreak 

 seems fairly well distributed wherever bogs are in 

 evidence, its larvae feeding on sheep laurel and 

 blueberry, which are usually found in such places. 

 In the first named locality it was in great profusion 

 principally on the edges of the woods bordering the 

 bog, but in the other two it was not nearly so plenti- 

 ful, probably owing to the much later date and its 

 being nearly over. 



Returning to the subject of the general scarcity of 

 butterflies, the only species that could compare in 

 point of numbers with former years were the two 

 large Fritillaries, Arg^nnis cljfcc/c and A. aphrodite, 

 and these literally swarmed again, in fact, I have 

 never known a season in which they did not. Several 

 of the small skippers were in goodly numbers as well 

 as the Spring Azure, more examples of the form 

 lucia being seen than previously. The Arctic skip- 

 per, Carterocephalus palaemon, was located again 

 in small numbers, not only at Hatley, but also in the 

 large swamp near Beebe already referred to. The 

 Black Swallow-tail, Papilio pol];.xencs, regained its 

 normal position, but the Monarch, Danaus archip- 

 pus, again failed to put in an appearance, although 

 ten examples of its counterpart the Viceroy, Basil- 

 archia archippus, were seen at various times between 

 June 12 and August 28, quite an unprecedented 

 number. The little Wanderer, Fcniscca iarquinius, 

 kept up its apparent record for rareness, only one 

 example being seen on June 14. Of the genus Poly- 

 gonia which was so plentiful last year, very few ex 



