BOARMIDAZ—ALEUCIS. 369 



cliscalspot and second line faintly visible, the latter blackened 

 toward the costa ; hind wings shining, smoky-white, dusted 

 with brown ; central spot black ; beyond it is an obscure 

 rippled smoky-black transverse line ; cilia pale grey. Body 

 and legs dark grey. 



Very constant in colour, but in the collection of Mr. Sydney 

 Webb are specimens having the cilia of the fore wings dusky- 

 grey and black, and one in which a large black blotch lies on 

 the dorsal margin of the fore wings, and a subterminal band 

 of blackish scales on the hind. 



On the wing in the middle to end of April. 



Larva almost cylindrical, the third and fourth segments 

 very little swollen ; anal segment squared behind ; toward 

 the hinder part of the body are several small tubercles ; head 

 blackish-brown, rounded, with the face flattened, a rounded 

 spot on each lobe ; body smoky-brown with an imperfect 

 row of faintly black V-shaped dorsal markings ; on each side 

 of segments eight and nine is a dusky white blotch, some- 

 times almost uniting on the back, across the twelfth segment 

 is a black line, and in front of the second and third pairs of 

 legs is a black oblique streak ; undersurface mottled with 

 paler smoky-brown. Exactly the colour of the blackthorn 

 twigs on which it rests. Mr. Buckler figures a curious 

 variety which bears, indeed, no resemblance to the usual 

 form, but is very pale blue-green with slender white longitu- 

 dinal lines and an imperfect, dotted, darker dorsal line. 



June, and the beginning of July, on blackthorn. 



Pupa short and thick, the wing-covers very broad and 

 rather dull from excessively fine sculpture of incised lines ; 

 head and eye-covers prominent and rather shining ; antenna 

 and limb-covers compressed and dull, sculptured with fine 

 cross-lines ; dorsal region glossy, roughly punctured ; abdo- 

 minal segments swollen, rather smooth, rapidly decreasing in 

 size, anal segment swollen but very short, cremaster a sort 

 of flattened button on which are two long hooked spines ; 



VOL. vi. 2 A 



