NEPTICULA. 303 



piirpurco-tiiictis, /rtscw recta pone xwQiWwm, par nm nil'ida, Inteo-cdhida ; 

 capillis ferrugineis. Exp. al. 2^ liu. 



Head and face vcddisli-ycllow. I'alpi whitish. Aiitcniiiie fuscous, 

 basal joint whitish. Anivr'un- \\'h\<rs paie ffo/d('>t-l/ro?o)i ; beyond the 

 middle is astraigJd, ydlowi.sh-icltite, sliijhUy sJunbig ffiHcia ; the apex of 

 the wing has a purplish tinge; cilia fuscous, i'ostcnor wings pale 

 grey, with pale grey cilia. 



Appears in May and August^ but not frequently met witli. The 

 yellowish larva mines in liawthorn-lcaves in autumn and .luly, but 

 has not at present been distinguished from the larva oi jj/j^/nucella 

 and (jratiosella. 



21. argentipedella, Zell. Isis, 1839, p. 215; '^V^.—medlofaa- 

 ciella, Haw.? Step.? — luiiibiwUa, Zett. ? Alis anticis violaceo-nigris, 

 fascia latluscula alblda pone medium; capillis nigrls. Exp. al. 3} lin. 



Head and face black. Palpi dark grey. Antennae fuscous, basal 

 joint whitish. Anterior wings black, with a violet gloss, with a rather 

 broad wJutish fascia beyond the middle, placed ]-ather obliipiely, being 

 nearest the base of the wing on the costa ; in the middle it is some- 

 times interrupted ; cilia grey. Posterior wings grey, with paler cilia. 



Occurs among birches in May and June, but iu)t common. 

 It has been bred by Ilerr Bouchc, from larvre mining in birch- 

 leaves. 



22. Acetosae (Sta.), Shield, Zool. 1853, p. 4153. Alis anticis 

 nitidis fuscis, pone medium violaceo-tinctis, fascia fere recta pone mediiuu 

 nitida alba; capillis fuscis. Exp. al. 2 lin. 



Head fuscous. Antennae fuscous, basal joint whitish. Anterior 

 wings shining fuscous, tcilh a faint violet timje beyond the middle ; be- 

 yond the middle is a nearly straight, sldnituj, whitish fascia ; cilia fus- 

 cous. Posterior wings pale grey, with pale grey cilia. 



Appears in May and August. The hirva mines the leaves of 

 the sorrel in autumn and in July; the mine is very peculiar; it 

 makes a scries of concentric circles till, as thougli the centrifugal 

 force at lengtli became too great, it flies oil at a tangent into an 

 irregular tortuous gallery. It has only hitherto been met with 

 by Mr. Shield, near Dublin, in some sorrel-plants growing among 

 furze-bushes, consequently in sheltered situations. Mr. Shield 

 has only succeeded in rearing a single specimen, which, with the 

 view of disseminating infornuition, he has very liberally ])laced 

 in my collection ; iis it is extremely hazardous to d(!scribe Ae/jti- 

 culoi from single specimens, the above description of the ])erfect 

 insect must be looked at as an approximation only; from the 

 habit of the larva, no doubt can attach to its being a distinct 

 species. 



23. plagicolella, n. sp. Alis anticis nitidis fuscis, postice pur- 



