BOA RMID.E—ODONTOPTERA. 53 



recently been obtained of a smooth smoky-black, without 

 markings, except that the nervures are deep black. In 

 another variety of somewhat uncertain occurrence the first 

 and second lines are xvliitc in a dark olive-brown ground 

 colour. In the collection of Mr. Frank Norgate is a speci- 

 men., obtained at Aberdeen, which has a black stripe across 

 the hind wings, and the two lines of the fore wings blackened 

 and almost meeting ; one in Mr. W. H. B. Fletcher s collection, 

 in which these two lines are white, has them drawn so nearly 

 together that they lie parallel from the middle to the dorsal 

 margin, enclosing only a narrow strip of central band ; 

 another in the same collection Las them joined in the middle 

 of the wings, and there abbreviated, so that the specimen 

 has no central band, but instead a large costal blotch. A 

 very curious specimen, reared at Heading by Mrs. Bazett, has 

 large portions of the fore wings almost diaphanous from 

 absence of scales, and the middle of the hind wings similarly 

 denuded, yet the cilia are perfect. 



On the wing in May and June ; occasionally at the end of 

 April. 



Larva twig-like, moderately stout, slightly enlarged 

 behind; there is a slight eminence, with two small points 

 sloping backwards, on the twelfth segment ; dorsal spots 

 slightly raised ; head large, bifid, dull purple ; face vertically 

 flattened, its lower portion ochreous ; anal extremity furnished 

 with three points ; body with a few scattered short hairs ; 

 colour dull purple, faintly clouded with ochreous and brown, 

 frequently having two orange dorsal dashes on the fourth, 

 and two on the ninth segment; eminence on the twelfth 

 segment edged with black ; anal points whitish beneath ; 

 undersurface between the prolegs paler. 



Or — ochreous, mottled and clouded with brown and purple, 

 especially so on the ninth and thirteenth segments ; dorsal 

 line purplish, narrowly margined with black, but interrupted 

 between the second and fourth segments ; on the latter is a 



