TRJFIDjE. 23 



LAfiViE cylindrical, smooth, naked, with distinct lines ; 

 feeding upon trees. 



Plt.<e subterranean. 



We have five species, not difficult to distinguish. 



A. Fore wings white mottled with grey, a black streak 



irom the base. X. rhizolitha. 



A 2 . Fore wings brown. 



B. Thorax dark umbreous. X. seynibrunnea. 

 B 2 . Thorax pale brown. X. jpctri/icata. 

 A 3 . Fore wings slate-coloured or black. 



C. First line of the fore wings angulated but perpen- 



dicular. X. conformis. 



C 2 . First line angulated but oblique and bent. X. lambda. 



1. X. semibrunnea, Haw. — Expanse 1| to If inch. 

 Thorax squared, with the shoulders prominent, dark um- 

 breous. Fore wings very narrow, hardly broader behind, 

 pale umbreous, blackened along the dorsal half ; near the 

 middle of the dorsal margin is a curved paler streak, and at 

 the anal angle another ; hind wings brownish-white. 



Antennas of the male simple, minutely ciliated, dark 

 brown ; palpi broadly tufted, reddish-brown, apical joint 

 long, blunt, and porrected ; eyes naked, reticulated, black ; 

 lashes curled over them, black-brown ; head prominently 

 tufted in two pairs of projecting pointed tufts, umbreous 

 tipped with darker ; thorax squared, the outer edges of the 

 shoulder-lappets raised into a sort of epaulet, purplish- 

 umbreous, rather paler in front ; top crest narrow, pushed 

 forward, and faintly divided, back crest small and rather 

 flattened, both black-brown ; fascicles brownish-white ; abdo- 

 men slightly flattened or dilated, light purplish-brown ; 

 having the dorsal ridge ornamented with six crests, black, 

 and all small except the third, which is tall and conspicuous ; 

 lateral tufts small, placed on a dilated ridge ; anal tuft 

 compressed and rather squared. Fore wings long, narrow 



