TRIF/D.-E. it3 



browuish-wliite, the collar whiter ; fascicles pure white ; 

 abdomen not stout, smooth and rather thinly scaled, glossy 

 white; lateral and anal tufts inconspicuous. Fore wings 

 narrow and unusually long ; costa a little arched at the base, 

 then straight almost to the apex, which is bluntly and 

 squarely angulated ; hind margin perpendicular to below the 

 middle, thence very oblique ; dorsal margin straight ; colour 

 extremely pale yellowish-brown or dull drab, almost without 

 markings, but the nervures are visibly brown ; and an ex- 

 ceedingly faint row of cloudy-brown dots, placed unusually 

 near to the hind margin, indicates the second line; cilia 

 rather darker brownish-drab, divided by whitish dashes. Hind 

 wings long; hind margin rather irregular, hollowed below 

 the apex, but then more fully rounded out than usual ; colour 

 of wings and cilia clear white. Female decidedly stouter, 

 otherwise similar. 



Underside of the fore wings white, costal region and 

 nervures pale yellowish-brown. Hind wings similar. Body 

 and legs whitish- brown. 



Not very variable, slightly so in the depth of brown 

 shading in the nervures, which sometimes spreads and ex- 

 tends towards the apex and hind margin. Mr. P. M. Bright 

 has a specimen from the kScottish coast which has the longi- 

 tudinal clouding of the nervures smoky-black, and another 

 tending in the same direction. 



On the wing from the end of June till August. 



Larva not very stout, cylindrical and uniform in size 

 except that the second segment tapers a little towards the 

 head, which is still smaller and sometimes retracted into it ; 

 anal segment also tapering and rounded off; skin plump 

 and smooth, segmental divisions moderately incised, and the 

 subdivisions of the segments delicately defined, the sides 

 dimpled ; head shining reddish-brown, blackish-brown about 

 the mouth ; dorsal and anal plates shining yellowish-brown, 

 the latter having behind it a fringe of fine brown bristles ; 



VOL. V. H 



