330 PROCEEDINGS OE TJIE XATIOXAL MUSEUM. vol.49. 



seemed to prefer such sunny glades to the more open spaces. In 

 both species the males were much more abundant than the females. 



7. AESHNA UMBROSA OCCIDENTALIS Walker. 



Of the two species of Aeslina this was the more abundant. This 

 material in Aeshna from eastern Oregon has been identified by Dr. 

 E. M.Walker, and in his monograph ^ further notes can be found on it. 



8. LIBELLULA PULCHELLA Drury. 



Common. 



9. SYMPETRUM COSTIFERUM (Hagen). 



Common. 



10. SYMPETRUM OBTRUSUM (Hagen). 



This was common in the blue-grass pasture back of Mr. Blue's barn, 

 but not so abundant as the next. This small white-faced oUrusum 

 was only found here. At all other places in which collections were 

 made the variety decisum was taken. 



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



Abundant. 



12. SYMPETRUM MADIDUM (Hagen). 



One specimen taken. 



13. SYMPETRUM PALUPES (Hagen). 



Common. 



14. SYMPETRUM SCOTICUM (Donovan). 



Very abundant. 



15. SYMPETRUM SEMICINCTUM (Say). 



Found only about Mr. Blue's ice pond. This species was not found 

 in either Baker or Pme Valleys. 



PINE VALLEY, OREGON. 



From September 20 to 23 I collected in Pine Valley, Baker County, 

 Oregon. This is a high cold valley (3,000 feet elevation) but has a 

 greater rainfall than Baker Valley. A heavy frost occurred at Pine 

 Town on September 21. The dragonfly season was practically over. 

 The following species were taken: Aeslina umlrosa occidentalis 

 Walker, Sympetrum pallipes (Hagen), and S. scot i cum (Donovan). 



GRANDE RONDE VALLEY, OREGON. 



On Septeml)er 30, 1909, I collected in Grande Ronde Valley near 

 LaGrande, Oregon. I took the following species: Aeslina 'umhrosa occi- 

 dentalis Walker, Sympetrum costiferum (Hagen), S. oUrusuni (Hagen), 

 S. oUrusuin (Hagen) var. decisum (Hagen), S. scoticum (Donovan), 

 and S. pallipes (Hagen). 



1 Walker, E. M. The North American Dragonflies of the GeniTs Aeshna. Tniv. of Toronto Studies, 

 Biol. Ser., No. 11, Toronto, pp. 213, pis. 2S, text figs. 7, 1912. 



