TRIFIDAL. 159 



wings very pale dx'ab with a longitudinal, central, umbreous 

 stripe, in which is a distinct white spot. Hind wings white 

 with dark brown nervures. 



Antennas of the male rather small and slender, pale drab, 

 ciliations excessively minute ; palpi narrowly tufted, pale 

 drab dusted with brown, apical joint very short ; head pale 

 drab, broadly tufted just above the antennas ; thorax of the 

 same colour, the collar just perceptibly barred with brown ; 

 scales at the back rather drawn together into small pale 

 brown tufts tipped with white; fascicles white; abdomen 

 pale drab, abundantly covered with white hair-scales ; lateral 

 and anal tufts rather browner. Fore wings not broad, of 

 neat appearance ; costa gently curved ; apex angulated ; hind 

 margin smoothly and regularly curved ; dorsal margin straight ; 

 colour glossy drab shaded and dusted with dark brown ; a 

 pale umbreous longitudinal stripe from the middle of the 

 base includes the median nervure and extends to beyond 

 the middle of the wing, where it shades off. but also broadens 

 in the hinder area and throws an oblique shade to the apex, 

 this last being edged above by a parallel pale shade ; hind 

 margin, to the anal angle, faintly clouded with umbreous ; 

 at the end of the discal cell, in the dark stripe, is a well- 

 defined white spot or dot ; the second line is obscurely indi- 

 cated in blackish-brown dots or dashes placed on the nervures, 

 and occasionally the first line is similarly suggested by two 

 black dots ; a row of minute black dots lies along the 

 extreme hind margin ; cilia brownish -drab. Hind wings 

 rather ample, clear white with brown nervures, brown- 

 black dots along a portion of the margin, and white cilia. 

 Female extremely similar but with a much narrower anal 

 tuft. 



Underside of the fore wings white, dusted with pale 

 brown along the costal and hind marginal regions ; nervures 

 tinged with the same; extreme hind margin dotted with 

 black ; cilia pale brown. Hind wings white, dusted along 

 the costal region with yellowish-brown ; hind margin dotted 



