60 The Ottawa Naturalist. [June 



1 male (Gibson); 1 male (Taylor); July 5th, 1907, 1 male. 

 1 female (Young); Httll, June 29th, i886, 1 male, 1 female. 



A blackish insect, seginents 2-7 having a row of dorsal 

 yellow spots, which, with exception of the one on 7, disappear 

 in old individuals. Inferior appendage of male deeply iDifur- 

 cated. 



L. intacia is extremely common in southern Ontario where 

 it is the sole representative of the genus. Farther north it is 

 replaced l)y several others, all of which are characteristic of the 

 Boreal Zone. 



Genus Sympetrum. 



To this genus belongs a number of small red, yellow or 

 brownish dragonfiies, mostlv with clear unspotted v.'ings, some 

 of which are exceedingly plentiful in late summer and autumn. 

 The pterostigma in our species is three or inore times as long 

 as broad, and the base of the wings is without black markings. 



43. Sympetrum costiferum (Hagen), Kirbv, 1887, 

 (Fletcher). 



Ottawa, 1885, (T. J. McLaughlin); Experimental Farm, 

 Ottawa, (det Provancher). 



Femora and tibiae yellow with black on the sides ; 

 wings flavescent at the ex1»rei?ie l>ase and visuallv along 

 the costal margin; superior appendages of male without a pro- 

 minent inferior tooth; vulvar l?mina of female not cleft. 



A somewhat local l)ut not uncommon species. 



44. Sympetrum vicixum (Hagen), Kirby. Fig. 22. 

 Ottawa, August 23rd, 1899, 1 fem^ale (Gibson). 



Femora and tibiae wholly yellow, wings flavescent only at 

 the extreme base, otherwise it agrees with costifenun in the 

 characters given. 



5. vicinmn is one of our latest dragonfiies to disappear and 

 is characteristic of late summer and autumn. It is yellow at 

 first, but later becomes briglit red. 



45. Sympetrum semicinctum (Say), Kirl:)y. 



Ottawa, August 20th, 1885, 1 female; August 27th, 1902, 

 1 male (Fletcher). 



Basal half of the wings brownish yellow, superior appendages 

 of male without a prominent inferior tooth, vulvar lamina of 

 female not cleft. 



This pretty little dragon is rather local but sometimes 

 common where it occurs. 



46. Sympetrum ru^icundulum CSav). Kirbv. Fw<,. 2.3, 

 24, 25. 



