354 NEUROPTERA. 



Rliyacopliila iiiaiueiisis n. sp. 



Belongs to section in which the fork 1 extends as far or farther basally 

 than fork 2. Palpi pale ; antennae pale, basal joint pale ; head dark 

 with yellowish hair, ocellar warts very small, fully twice their diam 

 eter apart; thorax black, abdomen brown; legs pale, tarsi darker 

 spurs brown, preapical one of front tibiae fully twice the width of joint 

 Wings long and slender, outer margin straight ; uniform pale brown 

 ish, the stigma hardly darker, no prominent spots, and but little hair 

 fork 3 a little longer than the pedicel beyond the cross-vein, fork 4 long 

 and narrow, fork 5 with subparallel sides, also long, fork 1 reaching a 

 little farther basally than fork 2. 



Expanse 20 mm. 



From Moosehead, Maine, 18 July (Johnson). 



Our species of Rhyacophila are separable as follows : 



1. Fork 2 of fore wings extends farther basally than fork 1 7. 



Fork 2 does not extend farther basally ,.2. 



2. Tarsus I marked with black and pale, preapical spur of front tibiae 



scarcely longer than the width of joint, which is pale at that 



place coloi'adensis. 



Tarsus I not dark and pale 3. 



3. Preapical spur of front tibiae hardly longer than width of joint ; 



tibiee unmarked, fork 3 shorter than pedicel terniinata. 



Preapical spur plainly much longer than the width of joint 4. 



4. Fork 3 as long as pedicel 5. 



Fork 3 shorter than pedicel, antennae yellowish, basal joint dark, 



legs yellow and spurs dark basalis. 



5. Spurs pale as legs liyalinata. 



Spurs darker than legs 6. 



6. Fore wings long and pointed, outer margin straight.. niainensis. 

 Fore wings shorter and broad, outer margin rounded. ...paciflca. 



7. Antennae black, except basal joint 8. 



Antennte pale, more or less annulate 11. 



8. Wings much marked, a yellowish spot on the stigma ...llictuosa. 

 Wings less marked, no spot on stigma 9. 



9. Wings deep black, no marks, basal joint of antennae black, 6 mm. 



long atrata. 



Wings paler, somewhat spotted, about 10 mm. long 10. 



10. Wings brown, more or less marked, basal joint of antennae dark. 



torva. 

 Wings darker, barely marked, basal joint of antenna; yellowish. 



nigrita. 



11. Large, over 25 mm. expanse, antennae and head pale 12. 



Smaller species 13. 



12. A curved series of connected pale spots in the middle of outer 



margin fuscilla. 



No such series of spots graudis. 



