66 PSYCHE [August 



Holocentropns flavus n. sp. 



Body black, head and tliorax witli short yellow hair; palpi yellowish brown; 

 antennae pale; legs pale yellowish; abdomen yellow brown. ^Vings yellowish, 

 clothed M ith fine short yelloAV hairs; venation yellowish, stigma l)rown, a whitish 

 hyaline spot on thyridium, one at end of discal area, and one on the arculus; hind 

 wings yellow gray. In fore wings the discal cell fully as long as pedicel; forks three 

 and four reaching a little before the cross-vein, fork one not as long as the pedicel; 

 in hind wings fork one is absent. 



Expanse 16 mm. 



One from Grand Lake, Newfoundland. 



Perlidae. 

 Isopcrla ventralis n. sp. 



Head mostly blackish, a yellow spot between ocelli and one each side behind; 

 antennae and palpi brown, pronotum, with broad yellowish median stripe, continued 

 back on the thorax, but indistinct; abdomen brown, apical part of female venter 

 yellowish; legs yellowish brown, femora not darker, setae yellowish. Wings gray 

 hyaline, venation dark brown. Setae nearly as long as the body, joints slender, radial 

 sector usually forked once beyond anastomosis, the fork usually twice as long as pedi- 

 cel, one cross-vein beyond end of subcosta, about five cross-veins in both median 

 and cubital areas. The antennee are long and very slender. The male abdomen 

 has a yellowish tip above, and beneath on the penultimate segment the middle of the 

 hind margin has a transverse elliptical, produced part of a yellowish color — a very 

 prominent point. 



Length 11 mm. 



Several specimens from Grand Lake, Newfoundland. 



Ephemeridae. 

 Siphhmurus sp. 



One specimen. 



Heptagenia sp. 



Several specimens, but all considerably broken. 



