THE CANADIAN ENTOMOLOGIST 253 



upward and freed the setae. For six minutes more it stayed in the 

 sunUght on the leaf, apparently getting accustomed to the new 

 world into which it had emerged. Then it took flight, flying 

 upward about thirty feet and coming to rest on a leaf of a tree 

 near the pond. In the meantime three other nymphs emerged 

 within two feet of the first one. One emerged on the side of an 

 almost vertical leaf so that the subimago slid out partly on to the 

 surface of the water and it had considerable difficulty freeing 

 itself, but finally it succeeded and remained clinging to the leaf 

 with its abdomen resting on the water for about six minutes. Its 

 upward flight was accomplished without any difficulty. Another 

 nymph crawled up a blade of grass at the edge of the pond. It 

 took a little longer for this subimago to get out of the old nymph 

 skin. There was a great abundance of life in the pond. Just a 

 few sweeps of a small dipnet brought out salamanders, beetles, 

 beetle larvae, chironomid, mosquito, cranefly, and other dipterous 

 larva?, dragon-fly, and damsel-fly nymphs, and mayfly nymphs of 

 the following genera: Heptagenia, Ephemerella, Leptophlebia and 

 Cloeo7i. 



No imagos were observed in flight and repeated trips to the 

 vicinity of the pond for a week and at various times of the day 

 from ten o'clock in the morning to nightfall, failed to find any 

 imagos flying. • , 



Siphlonurus mirus Eaton. 



Male imago. — Length 12-14 mm.; setae 18 mm.; fore leg 12-14 

 mm. Wing 12-13 mm. Head and thorax dark brown ; a few lighter 

 areas on sides of thorax. Legs uniform brown, a little darker at 

 joints. Hind wing of male usually entirely brown as compared 

 with the hind wing of the female, which is only about two-thirds 

 brown. Each segment of the abdomen 2-9, dorsally light in colour 

 with dark areas toward the lateral margin, along posterior margin 

 and two streaks extending forward from posterior margin. Ventral 

 surface with two lateral longitudinal bands on each segm.ent 

 and a darker area in middle. Genitalia, see PI. IX, fig. 2. 



Female imago. — See description, Eaton, p. 221. 



Nymph. — Length 15 mm. : setae 6-7 mm. ; legs 5-6 mm. General 

 colour brown. Head has a light area in front of the middle ocellus 



