610 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



7. ISCHmjRA CERVULA Selya. 



Not common. Several taken about the same pool as Coenagrion. 

 One male had the front of the thorax soUd black, no blue spots 

 being present. 



8. ISCHNURA PERPARVA Selys. 



Occasional. 



9. CORDULEGASTER DORSAUS Hagen. 



One male taken. Several observed on the small spring streams 

 tributary to Bear Creek. This is the highest (4,500 feet) and most 

 easterly record for this species. This was a surprise, as I had asso- 

 ciated this species with the warm torrents of the Coast Ranges. But 

 while the railroad is protected with snowsheds at Emigrant Gap, 

 which is 1,000 feet higher than Bear Valley, it is possible that the 

 floor of the valley enjoys a warmer climate. The following species 

 in this Ust would indicate a fairly moderate climate: Enallagma 

 carunculoMm Morse, Ischnura cermila Selys, Ischnura peiyarva Selys, 

 Cordulegaster dorsalis Hagen, Anax Junius (Drury), Aeshna multi- 

 color Hagen, and Lihellula pulchcUa Drury. 



10. ANAX JUNIUS (Drury). 



An Anax was observed patrolling a large pool in Bear Creek. 

 Probably this species. 



11. AESHNA MULTICOLOR Hagen. 



One taken. Common. 



12. AESHNA INTERRUPTA NEVADENSIS Walker. 



Several observed. One teneral captured at the head of the valley. 



13. AESHNA PALMATA Hagen. 



Several were easily netted, as they flew in short beats among the 

 willow thickets to escape the wind. This species in such a situation 

 is very easily victimized by the collector. They fly low and slowly 

 and are very bull-headed about keeping to their short protected 

 beat, two or three passes with the net sometimes failing to drive 

 one away. 



14. LIBELLULA PULCHELLA Drury. 



Several seen. One collected. 



15. LIBELLULA QUADRIMACULATA Linnaeus. 



Common. This was the lowest elevation at which I took this 

 moimtain species. 



16. PLATHEMIS LYDIA (Drury). 



Several seen. Two collected. 



17. SYMPETRUM OBTRUSUM (Hagen). 



Several collected. Not abundant. 



18. SYMPETRUM PALLIPES (Hagen). 



One male, a teneral, taken. 



19. SYMPETRUM SCOTICUM (Donovan). 



Several seen. Two taken. 



