TRIF1DM. 135 



Larvae with sixteen legs, but the first pair of prolegs less 

 developed than the remainder ; the twelfth segment swollen. 



PuPiE with but a small ventral projection ; in a silken 

 cocoon. 



We have but two species, readily discriminated. 

 A. Ground colour of the fore wings silvery-grey. 



H. urticce. 

 A 2 . Ground colour of the fore wings yellow-brown. 



H. triplasia. 



1. H. urticee, Hilh. ; tripartita, Stated. Cat. — Expanse 

 1| to 1J inch. Fore wings moderately broad behind, blunt, 

 silvery-grey, with a very broad dark brown transverse band 

 in the middle, ornamented with raised black lines. Hind 

 wings smoky-brown. On the collar are two oval silvery-grey 

 spots ringed with black. 



Antennas of the male simple, almost naked, grey-brown, 

 dotted at the base with white ; palpi slender, almost erect 

 but hardly extending above the head, black frosted with 

 white ; eyes brown-black, the front and back lashes very long 

 and curling over ; head blackish-brown, very strongly tufted, 

 the face covered with an erect tuft which is separated by a 

 deep transverse channel from another above the antennas ; 

 collar silvery-grey, divided distinctly into halves by a black- 

 brown bar, and each half ringed with black-brown in such 

 a manner as to present a most curious resemblance to a pair 

 of spectacles, each ring being flattened and hollowed so as 

 to increase the similarity ; shoulder-lappets greyish-white ; 

 remainder of the thorax occupied by a large erect curved 

 and hollowed crest, light brown in front and above, greyish- 

 white at the back ; fascicles broad, white ; abdomen dusky 

 grey-brown, the basal segments covered with long dusky 

 white hair-scales ; dorsal ridge brown-black ; upon it, on the 

 third segment, is a large erect expanded black-brown crest 

 followed by a smaller oblique one and faint indications of 



