THE SCOTCH ARGUS. 115 



which are the circular black spiracles ; the under parts and the 

 legs are of a somewhat warmer tint of the ground colour of the 

 back. It changed on June 22nd to a pupa, unattached, but 

 placed in an upright position amongst the grass near the 

 ground. 



The chrysalis has the body ochreous, with a darker stripe 

 down the back, and other lines ;.the eye covers are black, and 

 the thorax, antennas cases, and wing covers are dingy, dark 

 purplish-brown. 



The above descriptions of caterpillar and chrysalis are 

 adapted from Buckler, whose figures of these stages are also 

 reproduced on the plate. 



Air a prozcox, A. ccespitosa, and Poa are the grasses that 

 seem to be the food of the caterpillar. 



Mr. Haggart, of Galashiels, who had exceptional oppor- 

 tunities for observing the habits of this butterfly in its natural 

 home, gives a most interesting account of it in the Ento- 

 mologist for November, 1895. He writes — 



" The haunt of this species is, almost without exception, the 

 margin of a plantation or wood where the different species of 

 Poa grow abundantly, and always situated in such a position as 

 to receive the first rays of the rising sun. This last-mentioned 

 fact is so plainly evident, that the least observant cannot fail to 

 notice it. The insect is truly sun loving, and no collector need 

 go in search of it with any thought of success if the day be dull. 



" It is most interesting to observe the extreme sensibility of 

 the insect to shine and shade. A very good day to illustrate 

 this is one when heavy clouds at intervals obscure the sun ; the 

 moment it disappears so also does the butterfly, and no sooner 

 does it shine forth again than, as if by magic, scores of the insect 

 are on the wing. 



" The under side of the insect bears a marked resemblance to 

 that of a dead leaf, and I have often watched the males being 

 deceived by withered leaves lying among the moss. They 



