British Species of the Genus Micropteryx, 31 



are opaque, unicolorous, ash-coloured ; besides, in bistrigella the 

 first fascia is entire, and the second arched, and frequently inter- 

 rupted, and also placed more posteriorly than in aruncella $ . 



Sp. 3. Allionella, Fabricius. (PI. III. fig. 7.) 



Capillis ferrngineis ; alis anticis purpureis, fasciis duabus trans- 

 versls aureis, prima recta ante, altera obliqua pone medium, 

 maculaque irregulari aurea juxta costam, apicem versus. 



Allionella, Fab. 3,2,321 ; Zell. Isis, 1839,185 ; Sta. Cat. Tin. 9. 



Ammanella, Hbn. 388; Treit. ix. 2, 125 ? Steph. Illust. iv. 362, 

 pi. xli. fig. 2 ; Zett. Ins. Lapp. 1008, 10 (non Dup.) 



Exp. alar. 5 lin. 



Head and face ferruginous. Antennae black, more than half the 

 length of the anterior wings. Thorax fuscous. Abdomen, legs 

 and tarsi dark fuscous. Anterior wings purple or brownish purple, 

 with a golden fascia nearly straight before the middle, and another 

 placed rather obliquely beyond the middle; midway between this 

 and the apex of the wing is a large irregular gold spot nearer the 

 costa than the inner margin. Posterior wings pale cinereous, with 

 a purple gloss towards the apex. 



Hitherto a scarce species with us ; I have met with it in Torwood, 

 Stirlingshire, in June, but very sparingly, and last summer I beat 

 a single specimen from a mountain-ash, near Airthrey, Stirling- 

 shire. Mr. Douglas took a specimen last May in West-Wickham 

 Wood, and Mr. Dunning met with it among oaks near Hudders- 

 field. Treitschke says of his ammanella, (i only the size of cal- 

 thella ;" he was probably comparing it with the 2 calthella, which 

 is much larger than the $ ; he begins his description of Ander- 

 schella (which we know to be the same size as Allionella) by 

 saying " size and form of ammanella." In Mann's Catalogue, 

 ammanella, Tr., is placed as distinct from ammanella, Hbn., which 

 led me to imagine that it might be my subammanella, as indeed, if 

 it were the size of calthella $ , it probably would be. 



4. Subammanella, Stainton. (PI. III. fig. 8.) 



Alis anticis brunneo-purpureis, fasciis duabus luteis rectis, una 

 ante, altera paulo pone medium, maculaque parva lutea post 

 fasciam secundam; ciliis fuscis, apice albidis. 

 Subammanella, Sta. Cat. Tin. 9. 

 Exp. alar. 3 lin. 



Anterior wings purple brown, with two straight yellowish fasciae, 

 one near the base, the other a little beyond the middle, and a small 



