254 NEUROPTERA OF NORTH AMERICA. 



1. L. perpusillus ! 



Limnephilus perpusillus Walk.! Catal. 35, 54. 



Testaceous, with testaceous hair ; antennae fulvous ; anterior 

 wings narrow, the apex a little acuminate, subtestaceous, poste- 

 riorly and the apex obscurely guttated ; veins fulvous ; posterior 

 wings whitish. (From the description of Walker.) 



Length to tip of wings 7 millim. Alar expanse 13 millim. 



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

 ston). 



It is very closely allied to Colpotaulius incisus Stephens. 



Sub-Genus Limnophilus LEACH. 

 Anterior wings narrow, the apex broader, obliquely truncated. 



2. L. rhombicus ! 



L. rhombica Linn. Walk.! Catal. 22, 13. (With the synonymy.) Phry- 

 ganea rhombica Otho Fab. Fauna Groen. 196, 153. Berlin. Ent. Zeit. 

 Ill, 143. 



Ochreous, with luteous hair, antennas luteous ; thorax luteo-fus- 

 cous ; feet luteous, tibise with yellow, tarsi with black spines ; an- 

 terior wings ochreous, rufous posteriorly, with a large, discoidal, 

 oblique, rhombical spot, and another, not well defined, about the 

 anastomosis, subhyaline ; posterior wings hyaline, the apex sub- 

 flavescent. 



Male. Posterior wings underneath with a subapical fuscous 

 fringe ; superior appendages oblong, the apex and beneath a little 

 emarginated, with black teeth. 



Length to tip of wings 23 millim. Alar expanse 44 millim. 



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

 ston) ; Greenland (Fab.); Europe; Asia. 



The larva described by Otho Fab. 1. c. p. 197, belongs to Co- 

 lymbetes dolabratus. 



3. L. interrogationis. 



Phryganea interrogationis Zetterst. Ins. Lapp. 1063,12. GrammotauUus 

 interrogationis Kol. Trichopt. 40, 3. Walk. Catal. 19, 6; Berlin. 

 Ent. Zeit. Ill, 143. 



Grayish, shining ; antennas testaceous ; head and thorax hairy, 

 each side black; feet testaceous, posterior femora with a lateral 

 line, which is grayish; wings rather narrow, anterior ones brown- 



