1908] Dragonflies of the Ottawa District 19 



half as long as the superior, but curinns is a large metallic .green 

 insect, while congener is small and dark bronzy-Vjrown in color. 



4. Lestes unguiculatus, Hagen. Fig. C. 



Ottawa, July 15th, 16th, 1907, 1 male, 5 females, all teneral 

 except 1 male, (Gibson). July 30th, 1907, 4 males, 1 female 

 (Gibson, Letourneau); 2 males, 2 females (Fletcher, Harring- 

 ton); Clark's Bush, July 11th, 30th, 1907, 3 females (Letourneau). 



Widely distributed in the United States and in Canada, 

 ranges from Nova Scotia at least as far west as Regina, Saskat- 

 chewan. 



The males are easily known by the sigmoid curve of the 

 inferior appendages (Fig. C). 



5. lyESTES uncatus, Kirby. Fig. D. 



Ottawa, June 26th, 1906, July 9th, 11th, 15th, 16th, 30th, 

 1907, 15 males, 4 females (Fletcher, Gibson, Letourneau, 

 Taylor, Young); Clark's Bush, 1 male, July Uth, 1907, 

 (Letourneau). 



This appears to be the most abundant Lestes at Ottawa, 

 though less so than the next species in most parts of the province 

 of Ontario, where I have collected. It is a widespread species, 

 and is very common in the Canadian Northwest. It is a rather 

 robust metallic green form, and is easily distinguished from 

 the other members of the genus by the broadly expanded apices 

 of the inferior appendages of the male. The female is known 

 by the robust form, metallic coloration, and the very narrow 

 humeral thoracic band. 



6. Lestes disjunctus, Selys. Fig. E. 



Ottawa, August 1st, 1907, 1 male (Letourneau); 2 females 

 (Fletcher). 



This seems to be the commonest Lestes in Ontario, judging 

 by my own experience in the field, but in the Ottawa district 

 it would appear to be far outnumbered by L. uncatus and 

 unguiculatus, if the relation between the numbers of specimens 

 of these different species in the collections examined approxi- 

 mates that which obtains in life. 



L. disjunctus is somewhat smaller and more slender than 

 either of the other two forms mentioned, and the male is easily 

 separated from them by the - form of the appendages. The 

 inner margin of the superior ones bears two acute teeth of 

 nearly equal size, and the inferior pair reach beyond the 

 second tooth, and are straight and scarcely at all dilated apically. 



This species is somewhat difficult to separate from L. for- 

 cipatus, which may possibly also occur in the Ottawa district. 

 In the male of forcipattis the second tooth of the upper appendage 



