SESIID^. 83 



pale yellow belt near the base and two or three yellow spots 

 on each side ; anal tuft black ; legs blackish, tarsi shaded 

 with yellow. 



Wings transparent with the nervures purplish black; fore 

 wings with the costal margin broadly, and the dorsal margin 

 narrowly, purplish black ; apex and hind margin black, and 

 containing a large, rather crescent shaped, apical blotch, 

 which extends along the hind margin, purple black tinged 

 with bronzy ; transverse spot large, but not quite reaching 

 the dorsal margin, purple black. Hind wings with the 

 margins and a central spot near the costa purplish black. 

 All the cilia smoky brown. 



Under side of all the wings iridescent. Fore wings with 

 the costal and dorsal margins bright yellow; apical blotch 

 and transverse spot purple, but tinged in the male with 

 orange ; hind wings with bronzy margin and nervures ; cilia 

 all of a lovely bronzy purple. Palpi yellow. Under part of 

 thorax black with a yellow spot on each side, of abdomen 

 black with a yellowish spot on each side at the base, an 

 imperfect yellow belt, and a faint yellow spot under the black 

 anal tuft. Legs blackish beneath, with the spines and tarsi 

 pale yellow. On the wing in June and the beginning of 

 July. 



Larva one inch in length. Head flattened, purplish red- 

 brown ; second segment larger than the rest, having on the 

 back a shining plate, outlined with brown ; body pale yellowish 

 flesh colour with the dorsal vessel indistinctly seen through 

 the semi-transparent skin ; spiracles brown, indistinct ; anal 

 plate shining ochreous ; a few short fine hairs on the body. 

 Burrowing in the stem of an alder tree. (Buckler.) 



Mr. W. H. Tugwell saya : " Eggs are laid in June, hatched 

 in July, and the young larvae commence to feed under the 

 bark of alder (Almis (jlutinosa). Through the next year and 

 the following they tunnel in the solid wood ; but, when full- 

 grown in May of the third year, each larva eats its way to the 



