1882.] 171 [Hagen. 



moult they fastened themselves to the leaves for hibernation. Freyer 

 Neuere Beitr. pi. 541, p. 98 describes and figures the full grown 

 caterpillar. It is sea-green with a dark yellow lateral band and 

 covered with small black dots ; head small, legs greenish yellow, 

 prolegs yellowish ; spiracles below the lateral band ; the body is 

 fusiform. The caterpillar was from the Silesia Mountains, and 

 lived on Y. uliginosum, a plant also common in boreal America. 

 The European specimens vary considerably in size. The smallest 

 male figured by Freyer has only 37 millim. expanse ; it is from 

 the Silesia Mountains ; all intermediate sizes to 60 millim. are 

 on record. The variation in color from yellow to white for both 

 sexes and the variation of the pattern are numerous. It has been 

 entirely overlooked, that W. Scoresby, Journal of a voyage to the 

 northern Whale-Fishery, Edinb. 1823, p. 424, states that C. Palaeno 

 and Pap. (Argyn.) Dia occurred in great numbers on Jameson's 

 Land at Cape Lister and Cape Hope July 24 (p. 188) both on 

 the northern shore of Scoresby's Sound in the 70° 30' Lat. on the 

 eastern Coast of Greenland. The specimen was carefully exam- 

 ined by Prof. Jameson and Mr. J. Wilson and declared to be C. 

 Palaeno with a tinge of orange on the wings. Among the plants 

 found by Scoresby and recorded by Dr. Hooker is mentioned 

 Vaccinium pubescens, considered as a dwarf of V. uliginosum ; cf 

 H. Hagen, Entom. M. Magaz. 1883, July No. 230, p. 42. The 

 literature except the above quoted books is found in Stettin. Ent. 

 Zeit., Yol. 26, p. 272, by Werneburg; Yol. 27, p. 44, by Staud- 

 inger ; Yol. 31, p. 113, by Moeschler; Yol. 34, p. 157, by Schilde 

 and Wien. Ent. Monatschr., Yol. 4, p. 329, by Moeschler. 



All these papers discuss at some length C. Palaeno and C. 

 Pelidne from boreal America; Mr. Bremer quotes C. Palaeno from 

 the Amurland. 



Of the European form, thirteen ( $ 9 ) yellow and white are 

 before me, all from the Jura and Swiss Alps. Of the N". German 

 form I have only a colored drawing made by myself in 1830. Of 

 the Labrador form ten yellow males and yellow and white 

 females, all collected by Professor Packard, are before me, belong- 

 ing to the collections of the Peabody Museum and of Mr. Scudder. 

 The males expand 42 to 48 millim., one yellow female 50 millim. 

 The cut of the wings varies as in Europe ; the black marginal 

 band is as broad as in some from Swiss Alps ; those from the 



