THE CANADIAN ENTOMOLOGIST. 329 



NEW SPECIES AND NEW LIFE HISTORIES OF 

 EPHEMERID^ OR MAYFLIES. 



BY WILBERT A CLEMENS, TORONTO, ONT. 



(Continued from page 262.) 



Subfamily — Heptagenince. 



Ecdyuriis maculipennis Walsh. (PI. VI, fig. 4, Nymph.) 



Only a few imagos of this species were taken, although the 

 nymphs were abundant along open stony shores and in rapids. 

 My collections of nymphs date from July 2nd to August 23rd, and 

 rearings from July 6th to August 30th. 



Ecdyurns lucidipennis sp. nov. 



- This was not a very abundant species, but nymphs were col- 

 lected July 1st and 14th, and imagos reared July 4th and 17th, 

 respectively. 



Male imago: 



Measurements — Body 6 mm.; wing 7mm.; fore leg 6.5 mm. 

 Face very slightly obfuscated ; dorsal surface Of head dark brown or 

 reddish. Notum dark brown; sides of thorax and ventral surface 

 light yellow. Dorsum of abdomen a blackish brown; venter con- 

 siderably lighter. Penis lobes and bases of forceps yellow; forceps 

 tinged with black. Setse with basal halves slightly tinged with 

 black and minutely hairy. Fore femora dark, middle and hind 

 yellowish. Wings hyaline; longitudinal veins slightly dusky, es- 

 pecially costa and subcosta; cross-veins entirely colourless. 



Female imago: 



Measurements — Body 6 mm.; wing 7.5 mm.; fore leg 4 mm. 

 Thorax and abdomen lighter in colour than male. 



Nymph: (PI. VI, fig 5.) 



Measurements — Body 7-8 mm.; setse 3-4 mm. Head brown, 

 with numerous light spots, chief of which are 6 along anterior mar- 

 gin, 2 lateral to each antenna, 4 small, elongated ones between 

 antennae, and 2 small round spots anterior to these latter. Thorax 

 above lighter brown, with numerous light areas. Anterior part of 

 each abdominal segment brown; four light spots along anterior 

 margin, one large one at each lateral margin, and 3 along posterior 

 margin. Setae of about equal length and fringed with hairs; mid- 

 dle one slightly smaller in size than lateral ones. Femora fliattened, 



October, 1913 



