THE CANADIAN ENTOMOLOGIST 351 



Spinules on lateral margins of abdominal segments 2-8 increas- 

 ing considerably in size from the base of each segment to the 

 postero-lateral angles, when they form 

 an irregular group, (fig. 32). Lateral 

 appendages of male (pi. XXIII, figs. 6, 7) 

 in profile subtriangular; viewed dorso- 

 ventrally they appear broader than long, 

 their free margins broadly convexly 

 curved ; upper surface slightly sulcate. 



Gills (pi. XXIII, fig. 8) oblanceolate, ' a b ~ rV c '*<? 



broadest at the distal third -mires Fig. 32.— Spinules on right margin 



UlUctUCSL ctL Llie UIbld.1 UlirU, apiteS of seg s in (a) c resolutum, (b) 



rounded or convexo-acute; middle gill K te ™i™E m 'caw£LiJLm hageni ' 

 about three times, lateral gills four 



times, as long as broad. About two-fifths to one-half of the 

 upper margin of the median gill and about six-elevenths of the 

 lower margins of the lateral gills are spinulose, the spinules being 

 very minute at base but gradually enlarging to the end of the 

 series where they abruptly terminate. Distally the margins are 

 sparsely fringed with very short delicate setae. The pigmentation 

 consists of 10 or 12 irregular areas in which the tracheal branches 

 are pigmented, separated by unpigmented areas, giving the gills a 

 spotted or blotched appearance to the naked eye. Sometimes 

 there is some diffuse pigmentation along the median axis. 



On the dorsum of the abdomen is a pale median line, on each 

 side of which is a more or less diffusely pigmented area, which 

 sometimes forms a definite stripe. Legs more or less spotted, the 

 femora having an anteapical and sometimes a basal dusky annulus, 

 the tibiae also with a sub-basal annulus. There is also sometimes 

 a dark lateral band on the thorax and abdomen. 



Ovipositor reaching caudad well beyond the postero-ventral 

 margin of segment 10; it is slightly surpassed by the sharp-pointed 

 valves which reach the middle of the segment. 



Length of body (without gills) 14-18; outer wing-pad 3.6-4.3; 

 gills 4.5-7; hind femur 2.8-3-4. 

 Enallagma ebrium (Hagen). 



Among a number of nymphs of E. hageni, obtained at Toronto 

 Island, was a single male of E. ebrium, which emerged in the 

 morning of June 4, 1914. This was the first individual to emerge 



