185 



XVI. On the Butterflies of Anticosti 



BY AUG. E. GROTE. 



[liead before this Society, Oetdhcr 31, 1873.] 



This Society has received from Mr. William Coiiper a collection 

 of Lepidoptera made in the months of Jnne and July, on the 

 Island of Anticosti, which lies in the Gulf of St. Lawrence, be- 

 tween latitudes 49° and 50°. I am nnder obligations to Mr. Samuel 

 H. Scudder for his opinion on the eight species of Diurnal Lepi- 

 doptera collected by Mr. Couper. Two additional species of Grapta 

 have been reported, though not seen by me, making ten species of 

 butterflies in all known from the island. No species of Oeneis 

 were observed. Five of the species received present no features of 

 particular interest. These are: Vanessa Atalanta, Argynnis Atlan- 

 tis, Phyciodes Tharos, Cyaniris Lucia and Cyclopides Mandan. Tlie 

 other three I notice more fully, as follows : 



(llaucopsyclie Coiiperi, Orotc. 



This species differs from Lygdmnus and Pembina, in having a much broader 

 dark margin to the wings. The male (25 m. ui.) is more largely pale greenish 

 blue above, over the dark ground color, which, in the female (37 m. m.) obtains, 

 the blue color being confined to the basal and discal fields of the wings. 

 Beneath white shaded over dark, with a subterminal series of 7 black-pupiled 

 white ringed spots on the interspaces, and a discal ocellus on the primaries. 

 Hind wings with a twice broken subterminal series of 9 ocelli with obsolete 

 pupils, 2 more coalesced on the disc, 1 above on costal region. Fringes whitish. 



Ganoris oleracea, Scudder, var borealis. 



The markings on the veins are much darker and broader than usual, espe- 

 cially beneath. The species thus resembles /rz^'ida, but the elongated form of 

 the hind wings peculiar to frigida is totally wanting. This is a renewed 

 example of the interesting fact that white butterflies assume darker colors 

 when inhabiting elevated localities or higher latitudes. 



Papilio brevicauda, Saunders. 



The specimens agree in the special position of the markings with the New- 

 foundland form. There is a variation in the length of the tails, and the 

 coloration is more that of the continental P. Polygenes (Asterias). The form 

 is a segregated geographical one. While the female brevicauda approaches 

 in excess of yellow color the male, in the Southern States the male Polyxenes 

 seems to approach the ordinary female type. 



BUL. BFF. 80C. NAT. SCI. (24) NOVESIBER, 1873. 



