PHILOPOTAMUS. 291 



especially at the pterostigma ; posterior wings luteous ; posterior 

 tibiae ciliated. Male. 



Length to tip of wings 10 millira. Alar expanse 19 millim. 



Hub. Georgia (Collection of Hagen). 



16. H. bivittata ! 



Hydropsyche 1 bivittata Hagen ! 



Black, with black hair ; antennae pale whitish-yellow ; palpi 

 luteo-fuscous ; feet whitish, the four posterior femora, tibiae, and 

 the apices of the tarsi brownish-black ; wings black, the anterior 

 ones with black hair, and two white, transverse streaks, the apical 

 one interrupted. 



Length to tip of wings 6 millim. Alar expanse 11 millim. 



Hab. Panama. The specimen is mutilated ; — does it belong to 

 this genus ? 



PHILOPOTAMUS Leach. 

 Spurs arranged 2, 4, 4 ; ocelli three. 



1. P. confusus. 



Philopotamus confusus Walk.! Catal. 103, 7. 



Black, with hoary pile ; base of the antennae annulated with tes- 

 taceous; abdomen beneath, palpi and feet testaceous ; wings cine- 

 reous, the anterior ones obsoletely irrorated with pale. (From the 

 description of Walker.) 



Length to tip of wings 12 millim. Alar expanse 23 millim. 



Hab. Arctic America; Slave and Mackenzie Rivers (Richard- 

 son). 



2. P. distinctus. 



Philopotamus distinctus Walk. ! Catal. 104, 11. 



Black, with black and yellow hair ; antennae much longer than 

 the body ; palpi and feet testaceous ; anterior wings brownish-gray, 

 closely guttated with yellow. (From the description of Walker.) 



Length to tip of wings 6 millim. Alar expanse 11 millim, 



Hab. Trenton Falls, New York (Doubleday). 



Does the apterous female of Philopotamus observed by Double- 

 day at the same place belong here? See Entomol. Mag. v. 279. 



