ARGYRESTHIA, . 181 
6b. Palpi extremely short. 3. OCNEROSTOMA,. 
aa. Anterior wings subfalcate, Palpi rather short and thick; the ter- 
minal joint obtuse. 4. ZHLLERIA. 
Genus I. ARGYRESTHIA. 
Argyresthia p., Wiib. V. 422 (1816); Zell. Hderesa (et Argyrosetia), 
Curt. Gcophora p., Treit.; Dup.; Zett. Lrminea p. et Tinea p., 
Haw. Lsmene et Aryyrosetia, Step. 
Capilli hirsuti, epistomio levigato, Antenne alis anterioribus breviores 
(articulo basali elongato, inerassato), articulis distinctis, Haustellum 
breve, nudum. Palpi labiales penduli vel subporrecti, sywamis ap- 
pressis, articulo secundo apice incrassato, articulo terminali sudacuto. 
Ale longe ciliate, anteriores elongate, posteriores lanceolate ; an- 
teriores: ven ex cellule discoidalis parte postica novem octove ori- 
untur, apicalis simplex vel furcata ; subdorsalis simplex ; posteriores: 
vena apicalis ante apicem exit, infra eam vena furcata, et venee duse 
simplices e venula transyersa. 
Head rough; the face smooth. Antenne shorter than the anterior 
wings, with distinct joints; the elongate basal joint is thickened. 
Tongue short and naked. Labial palpi drooping or rather porrected, 
with appressed scales; the second joint with the apex thickened; the 
terminal joint rather acute. Wings with long cilia, the anterior elon- 
gate, the posterior lanceolate. In the anterior wings eight or nine 
veins arise from the hinder portion of the discoidal cell; the apical 
vein is simple or fureate; the subdorsal is simple. In the posterior 
wings the apical vein runs into the costa before the apex; below it are 
a furcate vein, and two simple veins from the transverse vein. 
The perfect insects of this genus may be at once recognized 
when at rest, as the hind pair of legs are laid alongside of the 
body, which is elevated at an angle of 45°, the head of the 
insect being almost in contact with the substance on which it 
rests; they thus stand on the first /owr legs only, whence Linnzeus 
named one of the species ¢etrapodel/a. ‘The species are found in 
hedges, trees, and bushes, from May to September, each species 
generally keeping out for a long time, and, as they very readily fly, 
they soon get wasted. ‘The larvee feed in the leaf-buds, destroying 
or crippling the growth of a young shoot, yet the luxuriance of 
vegetation is so great that no apparent ill effects are produced by 
a considerable number of the larvee feeding on the same plant ; 
of some species (according to Ratzeburg) the larvae assume the 
pupa-state inside the shoot, but more generally the larvee descend 
by their silken threads to the ground (nitide//a may often be seen 
so descending from a hawthorn hedge in May), and form on the 
ground amongst leaves a rather open network cocoon. 
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