200 A CATALOGUE OF THE LEPIDOPTERA OF 



each side are the spiracles. The posterior extremity is attenuated 

 and slightly furcate, as in the other larvae of the family.* 



11. C^NONYMPHA, Hi'lh. 



1. C. Davus, Fob. 



Papilio Davus, Fah. G. 259.— TFbof? Ind. Ent. t 2, / 47. 



Hipparchia Davus, Stepli. Ilhist. Hcmst. i. 67, pi. 7. 



Papilio Hero, Don. Brit. Ins. vi. 17, p/. 186. P. Tullia, 



Huh. Pap. 243, 244. Caenonympha Davus, Staint. 



Man. i. 32. 

 Var. a. Papilio Polydama, Haw. L. B. 16. Hip. Poly- 



dama, Stepli. Illiist. Haust. i. 67, jj/. 7,f. 3. — Wood. Ind. 



Ent. t. 2,/. 46. 

 Var. b. Papilio Typhon, Haiv. L. B. 16. Hip. Iphis, 



Stepli. Illust. Haust. i. 64. 

 This is a most variable insect, and has, it will be observed, 

 been considered as constituting three distinct species, to which 

 a fourth has been added by Zetterstedt in his " Insecta Lapponica," 

 p. 905, under the name of Isis. Certainly none of our British 

 Butterflies vary so much from mere geographical distribution. 

 The specimens taken near Manchester, its most southern limit 

 with us, are dark, and have the ocelli large and beautifully de-^ 

 veloped, constituting the type. Those of our counties are much 

 paler, and vary greatly amongst themselves. They are to be re- 

 ferred to the varieties a. and J., especially the former. I possess 

 specimens from Kinloch Rannoch, in Perthshire, having still 

 paler wings, with barely a trace of any ocellus ; and my friend, 



* Having this summer captured E. Cass tope on tlie nwuQtains near Sprinkling Tarn, Cum- 

 berland, and obtained a few larva; from eggs deposited by one of the specimens — which, 

 however, I regret to say, have since all died, both tho§e in my own possession, and those 

 given to my friends — I ma.y as well place on record a description of them, as the larva wa^ 

 previously entirely w,nkno-\\ni : Pale green, with numerous darker green longitudinal lines 

 shading into the ground colour, and with a well defined white line along each side in the 

 region of the spiracles. The larvae fed upon roa annua and Festuc^ ovina, though I sus-^ 

 pect, in a state of nature, they live on the young leaves of Nardus stricta or some of the 

 smaller Junci, which constitute the principal herbage of the moumtain sides where the insect 

 is met with. I hope, ere this Catalogue is completed, to add this species to our local fauna 

 from the green hills of the Cheviot range, as no doubt it is generally distriljuted at the 

 proper elevation, having alreadj', in accordance with mj' suggestions, been found in un- 

 expected parts of Cumberland, and being pretty widely spread throughout Scotland. 



