288 NEUROPTERA OF NORTH AMERICA. 



4. H. alternans. 



Philopotamus alternans Walk.I Catal. 104, 8. 



Black, with hoary hair ; base of the antennce fulvous ; feet and 

 apices of the abdominal segments fulvous ; anterior wings fus- 

 cous, closely irrorated with hoary ; posterior wings cinereous. 

 (From the description of Walker.) 



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



Hah. St. Martin's Falls, Albany River, Hudson's Bay (Barn- 

 ston). 



5. H. indecisa. 



Philopotamus indecisus "Walk.! Catal. 104, 9. 



Blackish, beneath testaceous, antennas testaceous, annulatedwith 

 fuscous ; palpi testaceous, fulvous at base ; feet testaceous ; ante- 

 rior wings cinereous, closely guttated with yellow. (From the 

 description of Walker.) 



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



ffab. St. Martin's Falls, Albany River, Hudson's Bay (Barn- 

 ston) ; Nova Scotia (Redman). 



Is this JI. moi'osa ? 



6. H. reciproca. 



Philopotamus reciprocus Walk.! Catal. 104, 10. 



Blackish ; antennce and feet testaceous ; palpi ferruginous, with* 

 the base black ; anterior wings subfuscous, closely irrorated with 

 yellow ; posterior wings pale fuscous. (From the description of 

 Walker.) 



Length to tip of wings 14 millim. Alar expanse 27 millim. 



Jlab. North America ? 



It is very much like H. indecisa. 



7. H. dubia. 



Hydropsyche dubia Walk.! Catal. 112, 33. 



Black, beneath testaceous ; antennae pale testaceous, annulated 

 with fuscous, the apex fuscous ; palpi ferruginous ; feet testaceous; 

 anterior wings subfuscous, obsoletely irrorated ; posterior wings 

 subcinereous. (From the description of Walker.) 



Length to tip of wings 11 millim. Alar expanse 23 millim. 



Ilab. North America ? 



