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radius much bent at pterostigma, discal cell much longer than pedicel, 

 fourth apical narrower than third at base, the cubitals fractured at pos- 

 terior anastomosis. Hind wings yellowish hyaline, scarcely infuscate 

 on tips, a brown dot in base of third apical cell ; fourth apical acute at 

 base. Length 18 mm. ; expanse 35 mm. 



One specimen from Yakutat (June) . 



Type. Cat. no. 5265, U. S. National Museum. 



Apatania tripunctata sp. nov. Plate XXVII, fig. 4. 



Head black, with white and yellowish hairs ; palpi and antennae 

 black. Thorax black, with short white hair ; legs yellowish, femora 

 black except the tips ; abdomen black. Wings blackish, darkest be- 

 yond the anastomosis ; veins black, with black hair ; membrane with 

 scattered yellowish hair, fringes black ; three hyaline white spots ; one 

 on veinlet closing the thyridial area, one on thyridium, one at arculus ; 

 hind wings with a white mark at base of the fifth apical cell ; in fore 

 wing the first apical is about twice its width on discal cell fifth apical 

 acute at base and not on thyridial area ; cubitals fractured at the pos- 

 terior anastomosis ; discal cell one-half longer than its pedicel. Length 

 ii mm. ; expanse 21 mm. 



Several specimens from Yakutat (June) . 



Type. Cat. no. 5266, U. S. National Museum. 

 Apatania sp. 



One specimen of a small black species from Kukak Bay (July). 



Family LEPTOCERID^. 

 Molanna sp. 



Two specimens of an ordinary-looking species from Popof Island 

 and Kadiak (July) . 



Mystacides nigra (Linne). 



Phryganea nigra LINNE, Syst. Nat. (12), p. 909, 1768. 



Several specimens from Yukatat (June). Widely distributed in 

 Europe and the northern parts of this country. 



Heteroplectron sp. 



One specimen from Popof Island (July). Apparently different 

 from H. californicum. 



Family RHYACOPHILIDJE. 



Glossosoma alascensis sp. nov. Plate XXVIII, figs. 17 and 18. 



Black ; antenna? yellowish on basal third (except basal joint) ; legs 



