34 Mr. H. T. Stainton's Monograph of the 



Subpurpurella, Haw. Lep. Brit. 571, 37; Steph. Illust. iv. 

 359, 11 ; Sta. Cat. Tin. p. 9. 



Exp. alar. 6 lin. 



Head and face cinereous. Antennae fuscous, about half the 

 length of the anterior wings. Thorax, abdomen, legs and tarsi 

 fuscous. Anterior wings bright golden green, with a faint ap- 

 pearance of a paler spot at the anal angle, and a still fainter 

 appearance of another midway between this and the apex of the 

 wing ; cilia fuscous. Posterior wings pale grey, with the apex 

 purplish; cilia cinereous. 



The commonest species of the genus frequenting oaks in May. 

 Its greenish anterior wings distinguish it readily from all its 

 congeners, except C.altliella and Aruncella $ ; from these, however, 

 it is at once distinguished by its size and cinereous head. 



Haworth gives three varieties, but they appear to have been 

 merely specimens in different degrees of preservation. 



Sp. 8. Semi par pur ella, Stephens. (PI. III. fig. 17.) 



Capillis cincreis ; alis anticis purpureis aureo-irroratis, macidaque 

 pallida subindistincta ad unguium anale ; antennis longioribus 

 quam dimidium alis anticis. 



Semipurpurclla, Steph. 111. iv. 359, 12. 



Solierella, Dup. xi. 407, pi. 302, f. 11 ? 



Exp. alar. 5 — 7 lin. 



Head and face fuscous, clothed with cinereous hairs, which 

 apparently are easily rubbed off. Antennae dark fuscous, more 

 than half the length of the anterior wings. Thorax, abdomen, 

 legs and tarsi fuscous. Anterior wings purple, with numerous 

 golden irrorations, and generally with a pale golden or whitish 

 spot at the anal angle, not however as distinct as in unimaculella. 

 Posterior wings pale grey, almost transparent, with the apex 

 purplish ; cilia grey. 



Not a scarce species among birches in March and April ; 

 occurring plentifully at West Wickham Wood and other places. 

 The difficulties in the genus begin with this species, which in my 

 Catalogue I have lumped together with purpurella and unima- 

 culella as one species ; these are, however, truly distinct, and 

 with fine specimens they are easily separated, though in the 

 ordinary run of specimens found in collections it is no easy 

 matter to say to which they should be referred. One main 

 reason for our specimens being so poor is, that we do not collect 

 them soon enough, they should be sought for in March ; by 



