TRIFID.'E. 303 



and another near Truro in the same county. So far as is 

 at present known this is the extent of its range in the 

 United Kingdom. 



Abroad it is not so strictly confined to the coast, but is 

 found in Southern Germany, Hungary, SwitzerLand, North 

 Italy, Spain and the South of France. 



o. P. Chi, L. — Expanse If to H inch. Fore wings white 

 dusted with grey, markings abundant, slender, black; a 

 small horizontal black bar with forked tips lies below the 

 stigmata ; hind wings white, or clouded with grey, more so in 

 the female. Varieties with darker fore wings are frequent. 



Antennas of the male threadlike but for one-half their 

 length ciliated with minute stiff bristles which imitate pectina- 

 tions, smoky brown with the base white ; palpi small, rather 

 narrowly tufted, white, clouded with black at the sides, apical 

 joint small, black, head dull white with a divided black bar 

 across the face and a distinct white tuft of scales at the base 

 of each antenna ; collar white, distinctly barred, in two arches, 

 with black ; remainder of thorax white dusted with grey, and 

 having a few black dots at the tips of the shoulder lappets, 

 crests very obscure, that at the back faintly tipped with 

 black ; fascicles white ; abdomen white, abundantly dusted 

 with grey, but the basal segments covered with long white 

 scales in which are two dorsal crests tipped with smoky black; 

 lateral and anal tufts small. Fore wings narrow at the base 

 and rather so throughout ; costa nearly straight ; apex 

 bluntly rounded ; hind margin slightly crenulated, curved 

 and below the middle very oblique, dorsal margin nearly 

 straight ; colour white, dusted with grey ; basal line black, 

 sharply angulated and broadly duplicated, the enclosed space 

 pure white, uniting with a rather curved deep black streak 

 from the middle of the base ; first line dark grey or black, 

 double and enclosing a white stripe, but much angulated ; 

 second line widely curved, duplicated and forming a double 

 series of grey-black crescents and angles, between which also 



