THE CANADIAN ENTOMOLOGIST. 195 



Nymph. — Labium long and slender, extending usually slightly 

 beyond the apices of the hind coxae but sometimes not quite 

 reaching the apices, in other cases extending as far back as the 

 middle of the hind trochanters. Slender proximal part of mentum 

 about two-thirds of its entire length, the middle breadth being 

 about one-seventh of the breadth at base of lateral lobes, widening 

 proximad to more than twice this breadth at the hinge; mental 

 setae usually 6 or 7, rarely 5 or 8 on one side; inner part of 

 lateral lobes with the marginal teeth prominent, the outer part 

 broad with the row of teeth straight and more regular than usual ; 

 lateral setae normally 3, rarely a fourth on the movable hook. 



Lateral spines present on abdominal segments 5- or 6-9, those 

 on 5, when present, very minute. Spinules on lateral carince of 9 

 varying from 10 to 14. Ovipositor much larger than in any other 

 species examined, the tips of the styli reaching the level of the 

 basal joint of the gills, the apices of the ovipositor slightly beyond 

 the joint. The sides of the valves are perpendicular, and their 

 ventral surfaces narrow; the longitudinal series of minute hairs 

 along the ventro-lateral margins is very inconspicuous. Gills 

 widest about the proximal third, tapering considerably in the 

 distal half, the width at distal third about two-thirds that at the 

 proximal third, apices acute. 



In distinctly marked specimens (in alcohol), the dorsum of 

 the abdomen is largely brown, the femora have a brown preapical 

 annulus and the tibiae and tarsi are apically infuscated. The dark 

 bands of the gills are often sharply defined. 



Length of body (without gills) 22-24 mm.; labium 4.3-5.1 

 mm. (av. 4.7); wing 4.9-5 mm.; hind femur 5-5.1 mm.; gill 

 8.9-10 mm. 



Lestes disjunctus Selys. 



I found the adults of this species in great abundance in two 

 marshy coves on the edge of Lonely Lake, Vancouver Island (see 

 under L. congener). There were also great numbers of exuviae 

 which I felt safe in referring to this species as it was the only one 

 present. I dredged up a number of nymphs which I also assumed 

 to be disjunctus, but the few that were reared all proved to be 

 congener. Only one specimen, not reared, was disjunctus. The 



