NO.L'107. DRAGONFLIES, WASHINGTON AND OREGON— KENNEDY. 337 



lata which always hovered over the sloughs. The two females taken 

 were scooped up accidentally. The males were distinguishable on 

 the whig endwise by their bright green eyes and sidewise by their 

 curved abdomen. None of the specimens were tenerals. In these 

 specimens the spots on the side of the abdomen were minute points. 

 All degrees of striping of the nasus occurred. 



13. LIBELLULA FORENSIS Hagen. 



This was not common. I took one specimen at Denham Falls. 



14. LIBELLULA QUADRIMACULATA Linnaeus. 



I have never elsewhere seen a large species of dragonflies as abun- 

 ant as was this species. Over the same grassy sloughs as those 

 occupied by Somatochloras, these Libellulas were a constant annoy- 

 ance during collecting, either disturbing other species or imitating 

 their flight, 



15. SYMPETRUM CORRUPTUM (Hagen). 



I took two frayed females on the meadows. 



16. SYMPETRUM MADIDUM (Hagen). 



The males and females of this species are seldom found associated 

 except at time of emergence. The males were common along the 

 higher open banks of the sloughs, where I saw no females, and the 

 females could always be found on the corduroy road, where I saw no 

 males. (On lower Satus Creek, Washington, I have never taken a 

 male, but females were common.) None of the specimens were 

 teneral. 



17. SYMPETRUM OBTRUSUM (Hagen). 



Several specimens were taken in the early red, which were probably 

 ohtrusum. 



18. SYMPETRUM OBTRUSUM (Hagen), var. DECISUM (Hagen), 



This variety was swarming out of the sloughs more directly con- 

 nected with the river channel. All were teneral. Some seemed 

 intermediate between this and ohtrusum, the face being white with 

 an olive cast. Two females had wings yellow to beyond the nodus. 

 All the specimens showed more than the usual amount of yellow at 

 the base of the wings. 



19. SYMPETRUM PALLIPES (Hagen). 



This species was emerging in large numbers. None but tenerals 

 were taken. 



20. LEUCORRHINIA HUDSONICA (Selys), 



This species was common in the sloughs, where the grass was 

 more open so that the surface of the water was exposed. They 

 spent most of their tune seated on the tops of aquatic plants. They 

 copulated on the wing, the male picking up the female as she sat 

 on some plant. The flight was short, after which the male dropped 

 the female but hovered near, while she oviposited by tapping the 

 tip of her abdomen repeatedly on the surface of the water. 



21. LEUCORRHINIA INTACTA (Hagen). 



This species occurs with hudsonica but was not so abmidant, 

 81022°— Proc.N.M.vol.49— 15 22 



