TRIFID^. 33' 



greenish bone-colour, or blackish-brown ; general colour pale 

 emerald-green, anal segment occasionally tinged with purple ; 

 both extremities often yellowish ; dorsal, subdorsal, and spira- 

 cular lines white, all distinct, the last named the narrowest ; 

 undersurface and legs unicolorous green. (C. Fenn.) 



April to June on sallow (Salic caprca and >S'. cinerea), osier, 

 and other willows, drawing together two or three leaves at 

 the top of a shoot for concealment. Sallows in hedges and 

 the margins of woods, and willows growing along streams, 

 are often selected, the topmost shoots being chosen, and often 

 so neatly drawn together as to present very little outward 

 appearance of being tenanted. It must, however, be borne 

 in mind that the shoots of the sallows and willows, at that 

 season of the year, are very much more frequently tenanted 

 by the larvas of Orthosia Iota. Cleoceris viminalis, or some 

 Geometra moth or Tortrix than by this species. 



The winter is passed in the egg-state. 



Pupa moderately stout, eyes prominent, anal extremity- 

 hooked ; colour shining mahogany-brown ; back rather 

 darker. In a cocoon of silk and earth in the ground. 

 (C. Fenn.) Mr. W. H. Tugwell, however, states that 

 pupation takes place in the larval habitation. Probably this 

 may be the case sometimes in the breeding-cage. - 



I know nothing of the habits of this species in the daytime ; 

 it never seems to be observed then ; at night it may occasionally, 

 though rarely, be taken at light or at honeydew, or even at 

 sugar, and I have found it at the blossoms of figwort {Scro- 

 ■phularia aquatica). Always a local and usually a scarce 

 species ; formerly met with occasionally in the London 

 suburbs, from which it has apparently long since disappeared. 

 It has been captured in Sussex, Surrey, Dorset, Devon, 

 Somerset, Gloucestershire, Berks, Middlesex, Herts, Cambs, 

 Essex, Suffolk, Norfolk, Hunts, Herefordshire, Worcester- 

 shire, Staffordshire, Shropshire, very locally in Yorkshire, 

 rarely on the coast of Cheshire and Lancashire, but so far as 



