350 THE CANADIAN ENTOMOLOGIST 



about twice this breadth. Inner part of lateral lobes about three 

 times as long as their middle breadth, the marginal teeth and those 

 of the middle lobe somewhat shorter than in other species, except 

 congener, the minute setae alternating with the latter teeth stout 

 and square-tipped (PI. XXIII, fig. l). Row of teeth between the 

 two hooks of the outer part as in rectangular is, disjunctus, etc. 

 Mental setae 6 or 7: lateral setae 3. 



Lateral spines on abdominal segments 5-9; 8-13 spinules on 

 lateral carinae of segment 9. The ovipositor in the reared 

 specimen reaches very slightly beyond the apical margin of 

 segment 10, in the other it just reaches the margin. It is quite 

 similar to that of rectangular is. 



Gills broadest at about the proximal third, tapering gradually 

 to the slender convexo-acute apices, the breadth at the distal third 

 about two-thirds of that at the proximal third. Transverse bands 

 rather faint in the two specimens examined but probably variable. 



The colour pattern is not distinct in the exuviae. 



Length of body (without gills) 19.5-20; labium 3.9-4.2; outer- 

 wing-pad 5.3; hind femur 5; gill 9-5; ovipositor 2. 



Enallagma hageni (Walsh). 



The nymph of this species has been described by Needham 

 (Bull. "68, N.Y. State Mus., p. 254, 1903) but the description is 

 insufficient for the recognition of the species. I have taken the 

 nymphs in large numbers in several localities and have frequently 

 bred them. They are readily known in the field (except from 

 E. ebrium) by the spotted gills. 



Nymph. — Eyes not very prominent (vide Can. Ent., XLV, No- 

 6, pi. 1, fig. 6); postero-lateral margins of head moderately convex 

 with a few spinules, the the curve of the postero-median excavation 

 somewhat broader and more flattened. Second antennal joint 

 3-3.5 times as long as thick. Labium with 3 mental setae (occa- 

 sionally a rudimentary fourth) and 5 or 6 lateral setae; distal 

 margin of lateral lobes with 6 or 7 teeth, the posterior (inner) 

 three larger than the others which are minute and ill-defined. 



