Monograph on Argyresthia. xvii 



semifasciella : the form of the first fascia and the colour of the anterior wings distin- 

 guish it from sorbiella. 



This insect frequents sallows in July, and is far from uncommon when its haunts 

 are sought: a notice of its habits, by Mr. Sircom, is given in the * Zoologist' (Zool. 

 2271). 



Sp. 19. GffiDARTELLA, Linneus. 



Tinea Gcedartella, Linn. Syst. Nat. i. ii. 897, 436. Faun. Suec. 1401. Fabr. Ent. 

 Syst. iii. ii. 320. Hubner, 133. Haworth, Lep. Brit. 571, 36. 



GEcophora Gcedartella, Tr. ix. 2, S. 162, and x. 3, S. 294. Dup. xi. 466, pi. 305, 

 fig. 8. 



Argyresthia Gcedartella, Zeller, Isis, 1839, S. 205, 13. Linn. Ent. ii. 282. 



Argyrosetia Gcedartella, Steph. Illust. iv. 252. Wood's fig. 1307. 



Expansion of the wings 5| lines. Head yellowish. Face whitish. Palpi whitish. 

 Antennae whitish, annulated with fuscous, the basal joint yellowish. Thorax yellow- 

 ish. Abdomen fuscous. Legs pale fuscous. Tarsi pale fuscous, with darker spots. 

 Anterior wings very variable, in the ground colour varying from whitish to golden ; 

 near the base is a golden fascia, placed obliquely ; on the costa it is connected with 

 the base ; about the middle of the inner margin arises a forked golden fascia, one arm 

 of which reaches the costa rather before the middle, — the other, placed more obliquely, 

 in the opposite direction, reaches the costa a little before the apex ; on the costa, be- 

 tween these, are generally a few golden spots ; towards the anal angle arises another 

 golden fascia, parallel to the exterior arm of the middle fascia, and occupying the 

 whole of the apical portion of the wing, except two small spots of the same colour as 

 the ground colour of the wings, one being at the apex, and the other at the anal angle : 

 cilia pale golden. Posterior wings fuscous, with paler cilia. 



Distinguished from Brockeella by the pale face and yellow head, and by the pale 

 portions of the anterior wings being of a less brilliant white, and the darker portions 

 more golden (not rich golden brown) ; from pygmaeella, by the deeper colour of the head, 

 the differently formed basal fascia, and the forked middle fascia ; from literella, by the 

 first fascia and also the middle one reaching to the costa. 



This species is generally distributed, frequenting birches and alders in July. 



Sp. 20. LITERELLA, HaWOVth. 



Tinea /z*ere//a,Haworth, Lep. Brit. 570, 33. 



Argyrosetia literella, Steph. Illust. iv. 253. Wood's fig. 1310. 



Expansion of the wings 5| lines. Head whitish yellow. Face whitish. Palpi 

 whitish. Antennae whitish, with fuscous annulations. Thorax whitish (?) Abdomen 

 fuscous. Legs whitish. Tarsi whitish. Anterior wings whitish, with a slender golden 

 fascia arising on the inner margin, not far from the base, sloping inwards, and not 

 reaching to the costa ; about the middle of the inner margin arises another fascia, 

 which almost immediately becomes furcate, the inner arm of which is parallel to the 

 first fascia, and the outer arm points to the costa a little below the apex, — neither arm 

 is continued to the costa ; towards the anal angle arises a third golden fascia, which, 

 VII. APPENDIX. CC 



