2G4 



HALF HOURS WITH INSECTS. [Packard. 



extremely difficult to detect them, so well did their pepper- 

 and-salt and greenish hues agree with the gray and green 

 rocks. On another occasion, while entomologizing on some 

 peculiar, light gneiss rocks overgrown witli gray lichens, a 

 -couple of hundred miles farther north on the Labrador coast, 

 I found it impossible to detect the Anartas, though resting 

 almost under my feet, so closely did these owlet moths re- 

 semble the rocks over which I clambered. Again, on the 

 hills above the Moravian settlement of Hopedule, thousands 

 of the beautiful dun-tinted Chionobas of different species 

 fluttered feebly over the lichen-clad rocks, the underside of 

 their wings corresponding exactly in color with the ground 

 Fig. 200. Fig. 201. 



t/inonobaa Buiiiidia. 



Grapta progne. 



on which they rested. This scene is i-epeated on that bit of 

 Arctic landscape, the extreme summit of Mt. Washington, 

 where the Chionobas semidia (Fig. 200, from Tennoy's Zool- 

 ogy) occurs ; as well as in other Alpine peaks of Europe and 

 the Rocky Mountains. A georaetrid moth (Marmopteryx 

 strigularla), which inhabits the mountainous regions of the 

 eastern states from Vermont to AVest Virginia, has the same 

 peculiar marbled under surface of the hind wings, and also 

 an allied species found in the Sierra Nevada. 



The under side of the Grapta butterflies (Fig. 201, Grapta 

 progne, right side) have the color of dead leaves, and as they 

 sit in paths with their wings folded over their backs would 



