TRICHOPTILUS. 63 



Alee anticce ultra medium fssce ; lacimce perangustm, 

 diversce ; angulus analis obsoletus. Alarum yos- 

 ficarum digiti tres filiformes, tertio paulo post 

 medium squamis projectis ornato. 



Antennae pubescent; palpi projecting beyond the head, 

 slender, acuminate, the second joint scarcely 

 thicker than the apical joint and about the same 

 length. 



The legs fairly stout. The posterior tibiae thickened 

 at the base of the spurs, and ornamented above 

 them with erect brush-like tufts of scales ; the 

 first pair of spurs of nearly equal length, the 

 second pair equal and shorter. 



Fore wings cleft to slightly beyond their middle ; 

 the lobes very slender, diverging ; the anal angle 

 not defined. 



Posterior wings with the upper cleft reaching within 

 one fourth of their base, the lower cleft nearly 

 reaching the base ; all the lobes very slender, 

 almost filiform, the third being adorned with a 

 projecting tooth of scales very slightly beyond 

 the middle of its hinder margin. 



The cleft of the fore wings is deeper and the tuft 

 of scales on the third lobe of the hind wings is situ- 

 ated nearer to the base than in any genus with which 

 1 am acquainted. 



It approaches the genus Acijitilus in its narrow 

 lobes and in the absence of a defined anal angle. 



