96 LLOYD'S NATURAL HISTORY 



Erastria unca, Treitschke, Schmett. Eur. v. (3), p. 253 (1826) ; 



Stephens, 111. Brit. Ent. Haust iii. p. 117 (1830). 

 Erastria uncula, Kirby, Eur. Butterflies and Moths, p. 278 



(1881). 

 Hydrelia uncana. Buckler, Larvae of Brit, Lepid. vi. p. 96, 



pi. 101, fig. 5 (1895). 



The Silver Hook Moth. 



The Silver Hook Moth is common in Central and Northern 

 Europe, Asia Minor, and Siberia. It expands about an inch. 



The head and collar are reddish-grey, and the rest of the 

 body is uniform ashy-grey. The antennae are dark brown and 

 filiform, and the legs are grey. The thorax is not crested. 



The fore-wings are nearly triangular, with the hind margin 

 somewhat curved outwards, and the apex rather acute. The 

 costa is narrowly ashy-grey, below which is a broad, yellowish, 

 almost flesh-coloured, band, which runs to the apex, where it 

 terminates in a dark spot. The inner margin also is narrowly 

 bordered with grey, to which succeeds a flesh-coloured band. 

 The central area is shining brown. At the base of the wings 

 is a white nervure, usually filled up with silvery, which touches 

 a large silvery spot with a dark nucleus in the middle of the 

 wings. A broad transverse line, shaded with brown and silver, 

 stretches in front of the brownish fringes, up to which the 

 surface is uniform brown, but separated from them, first by a 

 dark line, and then by a white one. The hind-wings are 

 reddish ashy-grey with whitish fringes, enclosed by a double 

 ashy-grey line. 



