152 THE i}UTTErvFLip:s of new England. 



tilt* under surfaco with the k',ii> and proleiis pale green, the legm a little infuscated. 

 Hairs pellucid, seated on green papillae, slightly darker than the upper surface of the 

 body. Spiracles minute and i)lack. Lengtli, 7.5 mm. ; width of head, 1 mm. 



Third stage (87 : 18). Head pilose, with three dark stripes on either side, continuous 

 with those of the body. Body light green, with a dark dorsal stripe, a dark latero- 

 stigmatal line and a dark stigmatal baud which runs to the anal horns. Length, 10 

 mm. (after Holmgren). 



Last stage. Head green, with six rows of brown punctures. Body pale pea-green 

 with dark brown lines along the sides, and a greenish brown dorsal spot on each seg- 

 ment. Legs concolorous ; spiracles black. Length, 32 mm. (after Fyles). 



Chrysalis. Head, amljer, with a broAvn dash each side. Wings pea-green, outlined 

 and streaked with l^roAvn. Abdomen pale yellowish green, Avith a darker green dorsal 

 line, luunerous longitudinal rows of brown dots, and the extremity roseate. Length, 

 l(i mm. ; breadtli, (! mm. (after Fyles). 



Geographical distribution (18:2). This is a circuiiipolai- species 

 inhabiting both worlds and three continents. In Europe it was long sup- 

 posed to be confined to points north of 61° N. Lat., in Norway, Sweden, 

 Lapland and Finland, but has latterly been found in isolated spots some- 

 what south of this, about Stockholm and in the Baltic islands southeast of 

 that city (Thedenius, Holmgren), about St. Petersburg (Moschler) and 

 even as far as the neighborhood of Kiga in Kussia in Lat. 56° 30' (Berg). 

 In Asia it is less known but it apparently occurs throughout the ^vhole 

 breadth of Siberia, as it is found on the northern banks of the Amur in 

 eastern Asia (Bremer, Eversmann), Avhich would mean farther south than 

 its greatest southern extension in Europe, and perhaps to as much as five 

 degrees or more, since the ri^•er in })art of its course reaches Lat. 48°. 



In Xorth America it has been found in the western half of the continent 

 by Captain Gideon Geddes, who obtained it at Emerald Lake, at a high 

 altitude, in British Columbia, Lat. 52°, Long. 118°, and by Mr. Macoun, 

 who took it in the Kocky Mountains beyond our territory. But just as on 

 the eastern side of the old world it appears to be found much further south 

 than on the western, so in eastern America, its range so far as known is 

 much further soutli than on the other side of the Atlantic. The only 

 authoritv who gi\es a very high northern locality is Rink, wdio says it 

 occurs in Greenland, the southernmost extremity of which lies at about the 

 altitude of Stockholm and St. Petersburg ; but on the continent proper it 

 has not been taken farther north than York Factory on the west shore of 

 Hudson Bay about Lat. 58° (Geffckcn). In the west it has also been 

 taken at Albany Kiver (Brit. Mus.) at Moose Factory, James Bay, 

 in the latitude of the British Columbia locality (Haydon), and at Nepigon 

 above Lake Superior (Fletcher) ; and in the east ahmg the Atlantic coast 

 of Labrador at Xain, Lat. 5(>° 24' (Boisduval), Ilopcdale (MiJschler, 

 Packard), and Square Island Harbor (Packard), the last at about Lat. 

 52° 'My. 



Between these points the only places where it has been found are far 

 south of either. One is the neighborhood of Quebec about 46° 50', 



