THEGLA. 
81 
7. T. Quercus, Linn. Faun. Suec. p. 283 (1761) ; Syst. Nat. 
1, 2, p. 788 ; Esp. Sclimet. i. 1, t. 19, f. 2 (1777) ; 
Htib. Enr. Schmet. i. f. 368-70. 
Expands 1*16 to 1*59 in. Wings blackish brown. Hind 
wings with a short but well-defined tail. The male has all the 
wings suffused with dull violet, excepting along the margins. The 
female has the purple decoration confined to a triangular patch of 
very brilliant bluish violet, extending from the base of the fore 
wings along their inner margins. The under side is ashy grey ; 
fore wings with a whitish streak running parallel to the hind 
margin. The hind wings with a similar streak running across 
their centre ; near the anal angle are two orange spots, the 
external one having a black centre. PI. XYIII., 2. 
Times of Appeakance. — July and August. 
Habitat. — The whole of Central and South Europe, and the 
Trans-Caucasian Provinces, frequenting oak woods ; as a British 
insect, commoner in England than in Scotland or Ireland. 
Larva shaped much like others of the genus ; it is reddish 
brown, often with green tinge, and has two rows of oblique stripes 
of black colour on the dorsal surface ; it feeds on oak-leaves, the 
eggs being laid on the twigs of the tree in July. 
The Pupa is brown, without angles, and according to the most 
accurate observations does not attach itself by the tail or by a 
silken belt ; thus resembling the pupa of T. Betulce, with which 
species the present one is placed in the genus Zephijnis by many 
modern entomologists, as before mentioned. 
VARIETY. 
Bellus, Gerh. PI. 4, 2; Htib. 621. Has a yellow spot in the 
centre of the fore wings. 
Habitat. — Hungary and Austria. 
8. T. Rubi, Linn. Syst. Nat. x. 483; Esp. 21, 2; Hub. 364-8. 
Expands 1 to 1'75 in. All the wings are brown, with a 
reddish gloss. The hind margins of the hind wings are slightly 
M 
