THE ENTOMOLOGIST. 



No. 11.] FEBRUARY, MDCCCLXV. [Price 6d. 



Life-history of Cidarla russata. — This species is uniformly 

 double-bvooded : the eggs which produce the spring brood 

 are laid about the middle of August; those which produce 

 the autumnal brood are laid about the middle of May : the 

 larvae from this second brood hybernate, or rather live 

 through the winter, feeding at intervals when the weather is 

 mild : the egg is flattish or depressed on the crown, and of a 

 dingy yellow colour, " resembling that of a pale-tinted chip- 

 box ;" it is laid on the leaves of Fragaria vesca (wild straw- 

 berry), and also, according to Guenee, on birch and white- 

 thorn, and according to Mr. Hellins "on sallow:" the young 

 larvae emerge about fourteen days after the egg is deposited, 

 and are at first of a dirty white, but soon acquire a green 

 tinge, which continues to increase as they advance toward 

 maturity. When full-fed this larva usually rests in a straight 

 position, but when annoyed or disturbed tucks in its head, 

 ijringing it in close contact with the legs, thus causing the 

 anterior half to assume the volute form. Head about the 

 same width as the 2nd segment, not notched on the crown, 

 slightly hairy : body almost uniformly cylindrical, but some- 

 what restricted immediately behind the 4th segment, which 

 is produced ventrally into a lump, on the summit of which 

 are seated the third pair of legs; the l-Sth segment below the 

 anal flap is produced into two parallel, " aculely"-pointed 

 processes directed backwards. Colour of the head pale 

 opaque green, with conspicuous black ocelli ; body pale yel- 

 low-green, with a medio-dorsal stripe, narrow and indistinct, 

 of a darker, duller green ; there is also on each side a paler 

 stripe, equally indistinct ; and in many specimens, below 

 this subdorsal stripe, a lateral, but often interrupted, rosy red 

 or purple stripe : this red stripe is accurately described by 

 Guenee, but when I wrote my former description of this 

 larva (published Zool. 7763) I had never seen this variety, 

 and therefore left it unnoticed : it is also to be remarked that 



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