PHYCITID.^-SALEBRIA. 4^7 



day in aspen trees, and has been captured by beating them. 

 It was originally noticed and described in this country by 

 Mr. J. E. Stephens, in his " Illustrations," but had apparently 

 not been again observed for many years, and had become 

 confused with a quite distinct species — adelphcUa, Fisch — 

 when in the year 1879 it was rediscovered, almost 

 simultaneously, by Dr. J. H. Wood at Tarrington, Here- 

 fordshire, and Mr. W. H. Harvvood, near Colchester, Essex, 

 and its identity and distinctness fully established. It may 

 still be found in both those localities, and has been met with 

 in Worcestershire and also in Kent and Surrey, but continues 

 to be excessively local in this country, and quite unknown in 

 the other portions of the United Kingdom. Abroad it is 

 recorded from France, Denmark, Germany and Austria. 



2. S. betulee, Goze. — Expanse | to 1 inch. Fore wings 

 elongate with rounded costa ; shining grey-black, with faint 

 whitish transverse lines ; before the first is a large blotch of 

 erect, deep black scales. Hind wings pale smoky-brown. 



Antennas of the male elbowed at the first joint, thickened 

 at the second, and there edged by a short black ridge, black- 

 brown ; palpi short and very blunt, curved up closely to the 

 face, deep black ; head and thorax grey-black or deep black; 

 abdomen paler grey-black, shining, the apical tuft dusted 

 with white, and each segment edged with the same. Fore 

 wings elongated, not very narrow ; costa arched from the 

 base ; apex squared ; hind margin almost perpendicular, but 

 faintly rounded ; colour glossy slate-black ; at a short dis- 

 tance a large perpendicularly placed blotch of upraised, deep 

 black, scales precedes the first line, but has itself a faint 

 white edging next the base ; first line slender and faint, dull 

 white edged with black, and placed obliquely outwards from 

 the costa ; second line obscurely white, somewhat erect but 

 sinuous, and really composed only of white dusting ; discal 

 spots obscurely black in a cloud of wliltish dusting ; hind 

 margin black dusted with white ; cilia shining grey. Hind 



