286 THE BRITISH NATURE BOOK 



pale yellowish fore-wings, smoky hind-wings. L. on roots of burdock, dead- 

 nettle, etc. ; full grown in May. Moth in June and July. Male often seen 

 swaying to and fro in flight like a pendulum. Generally distributed. 



Orange Swift (H. sylvina). E. i-i| inch. Male orange-brown with grey- 

 white markings on fore-wings ; female grey-brown. L. on roots of dock, 

 bracken, etc. ; full grown about July. Moth in July to August. Common. 



Common Swift (H. lupulina). E. i-i| inch. Fore-wings yellowish brown 

 in male, with white markings in stripes and dashes. Female pale brownish 

 grey, with less distinct markings. L. on roots of grass ; full grown in April. 

 Moth in June. Common ; often seen flying at dusk. 



II. Microlepidoptera. 



These are much smaller moths, far more numerous than the larger ones, 

 and requiring far more treatment than can be given here, but attention may 

 be drawn to the Tortrices, or Bell Moths, which have broad fore-wings ; the 

 Tinece, to which the Clothes Moths belong ; the Pterophori, or Plume Moths, 

 which have their fore-wings divided into two, and the hind-wings into three 

 separate feathers ; and the Alucitcs, of which only one British species is known 

 the beautiful though common Twenty-plume Moth, each wing having six 

 feathers. 



