204 THE CANADIAN ENTOMOLOGIST. 



tibiae darker above and tarsi also darker. Wings black, with some 

 scattered yellow- hair, the principal marks being three costal spots 

 of yellow, and three on hind margin, one at arculus, one beyond, 

 and one before it; in disc various faint markings, transverse; 

 anastomosis hyaline white, hyaline forked, mark on fork of median 

 vein ; hind wings gray, with gray fringe. 



Expanse 8 mm. 



From Black Mt., North Fork Swannanoa River, N. Car., May, 



hydropsychim:. 



In the classification of this family great importance has been 

 placed on the presence of ocelli, and of three spurs on the anterior 

 tibia. Since both of these characters are common in the Rhyaco- 

 philidse, the ancestors of the Hydropsychidae, I think they are not 

 of such great importance, and as ancestral characters are liable to 

 break out in various places in the Hydropsychidae. To use the 

 two little appendages at the tip of the female abdomen would also 

 produce false alliances. I have therefore below used a new char- 

 acter as of prime importance; one that is easy of application: 



1. Fork 5 of fore wings subequal in length to fork 4; palpal joint 2 



about as long as 3 or 4; inferior male appendages two-jointed, 



usually slender; penis often long and prominent 2 



Fork 5 of fore wings much longer than fork 4 (or i absent) ; 

 palpal joint 3 or 4 usually much longer than 2 3 



2. Hind wings broad, with a closed discal cell; fork 1 in fore wings: 



no warts in pits of mesonotum; tip of female abdomen not 



with two little appendages Hydro psychini. 



Hind wings narrow, no closed discal cell; fork 1 lacking in both 

 wings; fifth palpal joint not nearly as long as others united; 

 in female mid-tibiae and tarsi dilated Psydiomyini. 



3. No warts in pits of mesonotum; ocelli present; spurs 2, 4, 4, 



mid-tibiae and tarsi of female not dilated Philopotamini. 



A small wart in a pit each side on mesonotum; spurs 3, 4, 4; no 

 ocelli; mid-tibiae and tarsi of female dilated (at least a 

 little Polycentropini. 



The Hydropsychini will include Hydropsy die, Hydropsy diodes , 

 Arctopsyche, Diplectrona, Rhyacophylax, Smicridea, Potamyia, 



