TORTRICINA. 45 



Antennae straw-coloured, alternated with fuscous ; basal joint clothed 

 with sulphur- coloured scales. Thorax and patagia apple-green, nar- 

 rowly yellow in front. Anterior wings apple-green, with the costal 

 edge sulphur- coloured ; the disk is very frequently reticulated with 

 slightly darker green, the reticulation is most distinct upon the 

 venation, particularly at the apex. Apical scales apple-green, with 

 slightly paler bases. Cilia white, sometimes with a yellowish tinge. 

 Posterior wings shining, pale grey. Marginal scales sometimes 

 darker, sometimes paler than the wing, with pale bases. Cilia white. 

 Abdomen grey, the caudal tuft pale fuscous. $ Exp. al. 10-12 lin. 

 Same as the < , except that the posterior wings in some specimens 

 are broadly edged with a delicate green flush, visible in certain 

 lights. 



Variation : there is one variety, in which the head, thorax, patagia, 

 and anterior wings are of a primrose colour; but almost all the 

 specimens we have seen are females. According to Stephens, in his 

 ' Illustrations ' (Haust. vol. iv. p. 69), these are erroneously stated 

 to be faded specimens, and are " the Tortrix Suttneriana of the 

 Wien Yerz." In the Stephensian Cabinet, at the British Museum, 

 is an instance of this variety, which is in fine condition. The typical 

 insect varies as to intensity of colour, and slightly as to size. 



The imago appears from the end of June to the middle of 

 July, according to season ; is usually extremely abundant, and is 

 distributed generally over the country, particularly in the south 

 of England. 



The pupa is about 6 lin. in length, arid of a dark chestnut 

 colour, sometimes alternated with paler brown at the bases of the 

 abdominal segments. It is to be found in June, spun up in a 

 white silken web, between united or turned-down leaves of 

 various trees, shrubs, and herbage, but particularly among Oaks. 



The larva is active, when full-grown, about 10 lin. in length, 

 of a bright green colour to the middle ; beyond of a yellowish 

 green, with minute black spots ; the head is hazel colour ; the 

 shield bluish green in front, behind greenish brown, streaked 

 and spotted transversely with dark brown. Its food is princi- 

 pally Oak, in some seasons quite defoliating the trees. It is also 

 to be found on Hornbeam, Aspen, Beech, and other forest-trees. 

 The insects bred from larvae, which had fed upon Beech, turned 

 out uniformly of a pale whitish-green colour. 



4. Forsterana, Fab. Alis anticis cinereo fuscis ; maculis tribus 

 saturatioribus in triangulo dispositis, duaa ad costam, tertia in 

 margine dorsali ; posticis fuscescentibus. tf Exp. al. 11-13 lin. 

 Head : dull tawny behind, dull fuscous in front. Face dull fuscous. 



Eyes velvety black. Palpi : above, between, at sides, and beneath, 



