26o LEPIDOPTERA. 



Sometimes this is almost absent, leaving the fore wings 

 of the pale umbreous ground-colour, or even with a tinge 

 of purple in the brown. A considerable number of such 

 specimens were reared in 1896 by Mr. Percy Bright. 

 On the wing in July and August, 



Larva. When viewed from above it tapers towards the 

 head and still more towards the posterior end, but when 

 seen sideways appears almost uniformly long and slender. 

 Head rounded, rather flattened in front, pale brown ; along 

 the back, commencing on the head, is a dark brown, very 

 finely mottled, broad stripe, widest along the middle 

 segments, and with an additional widening on the eleventh 

 segment ; in the middle of this is a thin rather paler stripe 

 enclosing the very dark brown- dorsal line ; subdorsal stripes 

 double, brown, with a paler ochreous-brown ground-colour, 

 followed by a pale stripe of ochreous enclosing a very thin 

 brown line ; spiracular line double, dark brown, extending 

 from the mouth to the anal prolegs, edged above with black 

 at the anterior portion of each segment, the upper one 

 widening below in the middle, along which are some black 

 dots ; undersurface and legs brown ; raised dots black. Its 

 manner of walking is a partial looping of the first sis seg- 

 ments; the first two ventral prolegs are very slightly shorter 

 than the others, but to so small an extent as to be scarcely 

 noticeable, and it generally assumes an undulating posture 

 in repose along the stem of its food-plant. (W. Buckler.) 



May and June on Vicia sylvatica, V. sc-pitim, V. cracca, Astra 

 galus, Orobus, and possibly other vetches, feeding at night, 

 and apparently preferring the young tender shoots ; hiding 

 by day upon the stems. The winter is passed in the egg 

 state. 



Pupa entirely dark brown inclining to black ; wing-cases 

 not produced to a point ; anal segment terminated by a 

 bunch of short spines with fine recurved points. (Rev. E. 

 Horton.) The described pupa changed without forming 



