J 96 THE CANADIAN ENTOMOLOGIST. 



time for emergence of this species was practically over at the time 

 the nymphs were collected (July 31, 1913). 



Nymph. — Labium exceedingly long and slender, reaching back 

 beyond the apex of the hind coxae or even beyond the trochanters. 

 The slender proximal part of the mentum includes about two- 

 thirds of its length and its breadth, at the middle, is about one- 

 seventh of the breadth at the base of lateral lobes. It expands 

 proximad to more than twice its middle breadth. Mental setae 6 

 or 7; lateral lobes similar to those of uncatus, the row of teeth on 

 the outer part somewhat less regular; lateral setae 3. 



Lateral spines on segments 5-9 (4-9 on one specimen); 11-14 

 spinules on lateral carina? of segment 9. Ovipositor extending 

 slightly beyond the hind margin of segment 10, the styli reaching 

 fully as far back as the apex. The longitudinal series of minute 

 hairs on the ventral surface of the valves is slightly mediad of the 

 lateral margin of the valves. Gills broadest at the proximal 

 third, thence tapering gradually to the slender pointed apices, the 

 breadth at the distal third being less than two-thirds of the 

 breadth at the proximal third. The dark bands of the gills are 

 somewhat diffuse in all the specimens, and in some very feebly 

 indicated. The only other indications of a colour-pattern are the 

 very feeble preapical femoral annuli and the darkened apices of 

 the tibiae and tarsi in some individuals. 



Length of body (without gills) 18-19 mm.; labium 4.75-5.5; 

 outer wing-pad 4.5-5mm.; hind femur 5.1 mm.; gill 8.8-10 mm.; 

 ovipositor 2-2.3 mm. 



Described from two nymphs and four exuviae. 



Lestes forcipatus Rambur. 



I have only a fragmentary male exuvia with the imago and 

 four mounted labia, of this species, received from Professor 

 Needham. The exuvia lacks both head and gills so that it is 

 impossible to form a proper idea of the characters of the nymph. 

 Moreover, one of the mounted labia is considerably larger than the 

 others and appears to me to belong to a different species. Pro- 

 fessor Calvert, however, has kindly furnished me with the following 

 data taken from a male, reared by himself. The nymph was 

 collected in Delaware Co., Pa., July 16, 1891, and transformed 

 on July 22. 



