THE CANADIAN ENTOMOLOGIST. 17 



eyes. The spiracles are of the same colour as the body. The latter is 

 round, tapering posteriorly and with the back arched. The anus is two- 

 pointed. (Zweispitzig.) Length 35 mm. 



The caterpillar feeds upon different grasses, and is of an exceedingly 

 sluggish disposition. When disturbed it curls up and remains for a long 

 time without motion. It hibernates twice, and pupates in the month of 

 May in its winter quarters among the roots of grass just below the surface 

 of the ground. It is greatly subject to the attacks of ichneumon-wasps. 



The handsomely coloured chrysalis is short and thick, provided with 

 long and broad wing-sheaths, which, as well as the thorax, are of a 

 bright green colour. The abdomen is bright reddish-yellow, with dark 

 spots and a bright green line upon the dorsal aspect, together with a 

 darker line of the same colour upon either side ; the spots in the vicinity 

 of the middle line are arranged in pairs upon each segment ; the cre- 

 master is short and blunt ; the region of the head is adorned on each 

 side by a coal-black, shining streak, which is bent into the form of a half- 

 moon. 



The chrysalis, which, as in the case of all Satyrids, is stiff and incap- 

 able of motion, and when moved gives no evidence of life, is attacked 

 by parasites of a larger species of ichneumon than attacks the caterpillar. 

 The imago is disclosed after the lapse of from three to six weeks from the 

 date of pupation. The transformations have been hitherto unknown. 



This thoroughly Arctic species, which hitherto has not been found 

 south of Lat. 68-69 ^'j ^^^ fi"^^^ detected by Dr. Staudinger upon Nor- 

 wegian territory in the year i860, by a pair of specimens coming from 

 Kautokeine in Finmark. Later, in the year 1875, the butterfly was taken 

 by me in numbers upon the sandy meadows near Jacobsely, close to the 

 margin of the Arctic Ocean, in profusion in the interior at Nejden, at 

 Skogerones ten Kilm, nearer to the sea, and in scattering examples upon 

 the crags at Kirkenes. In Russian Lapland, upon the stretch of country 

 lying between Jacobsely and Kola, this species of butterfly is of very 

 common occurrence. Upon the Norwegian coast, west of Warangerfjord, 

 it has, nevertheless, not been as yet observed. 



The caterpillar was found for the first time upon May 15th, 1880. 



