NO. 2107. DliAOONFLTEf?, WASHINGTON AND OREGON— KENNEDY. 329 



13. LIBELLULA QUADRIMACULATA Linnaeus. 



Two specimens of this species were seen during August. One was 

 taken. 



14. LIBELLULA PULCHELLA Dniry. 



This species was common but not abundant at any place. 



15. SYMPETRUM CORRUPTUM (Hagen). 



One pair was taken. 



16. SYMPETRUM COSTIFERUM (Hagen). 



Common, but not so abundant as decisum. 



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



The most abundant of the Sympetrums. 



18. SYMPETRUM MADIDUM (Hagen). 



This species was common during June and July but was not taken 

 during August. 



19. SYMPETRUM PALLIPES (Hagen). 



Several specimens taken. Not common. 



20. SYMPETRUM SCOTICUM (Donovan). 



This species appeared during the first week in August. It was at 

 first very abundant in a grassy slough. The individuals soon spread 

 from this over a wide territory. 



EAGLE VALLEY, OREGON. 



From September 7 to 19, 1909, I collected at New Bridge, Baker 

 County, Oregon, in a small valley called Eagle Valley. Here the 

 collecting was done along the banks of Eagle Creek, but the speci- 

 mens collected came from a series of sloughs more or less alkaHne, 

 which ran parallel to the creek. The creek was a cold gravel- 

 bottomed mountain stream almost dry from its waters having been 

 used for irrigation in this part of its course. This valley was lower 

 (2,500 feet altitude) and warmer than Baker Valley. 



1. LESTES UNGUICULATUS Hagen. 



Several specimens taken. 



2. ENALLAGMA ANNA Williamson. 



Several taken. 



3. AMPHLAGRION SAUCIUM (Burmeister). 



Several taken. 



4. ISCHNURA CERVULA Selys. 



Occasional. 



5. ISCHNURA PERPARVA Selys. 



Common. 



6. AESHNA PALMATA Hagen. 



This species was common. No tenerals were seen. It was in 

 company with Aeshna umhrosa occidentalis and had apparently 

 identical habits, as both patrolled the smaller, more stream-like 

 sloughs, especially where those were surrounded by trees. Both 



