1914.] NATURAL SCIENCES OF PHILADELPHIA. 615 



'Of the tarsi, setse white. Wings hyaline, veins pale, a light brown 

 'Or reddish l)rown streak extending from middle of base one-half way 

 out to tip, it is bounded in front by the subcosta and behind by the 

 fourth vein, it contains two or three pale dots, sometimes a few dark 

 marks in costal area. Two rows of cross-veins, the outer not much 

 more than their length from the margin; marginal intercalaries in 

 pairs. Hind wings fully twice as long as broad, angulate in front. 

 Expanse 17 mm. 



From Stony Mt., Manitoba, 16 September (Wallis). 



Callibaetis pretiosa n. sp. 



Brown; thoracic notum with two narrow white stripes above; 

 abdomen with darker spots on sides; legs pale, tips of tibiae and 

 tarsal joints dark; setse wh^te, the joinings dark. Wings hyaline, 

 veins and cross-veins mostly white, except where there are dark 

 marks; five or six faint irregular clouds along the hind border, a 

 fairly broad, brown stripe from base to tip on costa, its hind border 

 sinuate with four projections, four hyaline spots in the subcostal 

 area before middle, about five pale spots on costal area before middle, 

 and several more or less connected beyond. Outer row of cross- 

 veins not twice their length from margin. Marginal intercalaries 

 single, except toward tip of wing. Expanse 14 mm. 



From Great Falls, Va., 11 September. 

 Heptagenia coxalis n. sp. 



d^. Pale yellowish, carina of face dark each side above, antennae 

 pale, thoracic notum with indistinct median darker streak, base of 

 abdomen dark above, beyond pale, segments not plainly marked, 

 but last two are dark; legs pale, a black line, wider at each end, 

 at base of the hind coxa, femora faintly dark at tips, and tip of tibia I 

 dark; claspers pale; setae pale, dark at tips of joints. Wings hyaline, 

 veins brown, apical costal area brownish yellow, some of the costals 

 faintly margined; 8 costals before bulla, 14 beyond, all simple. 

 Tarsus I of male has first joint about one-third of second, the third 

 equal second, fourth twice as long as first, fifth fully as long as first. 



9 . Mostl}' yellow throughout, black line on hind coxa as in cf ; 

 some costals margined. Expanse 21 mm. 



From Clear Creek, Colo. (Oslar). 



Heptagenia subeequalis n. sp. 



cf . Head and thorax rather reddish yellow, a shining black ring 

 at base of each ocellus, antennae pale, thoracic notum rather dark 

 behind, abdomen pale, segments dark on apical one-third or one- 



