612 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



6. ENALLAGMA CALVERTI Morse. 



Several were taken on the beach. 



7. ENALLAGMA CARUNCULATUM Morse. 



One male was found among Enallagma collected on the beach. 



8. ENALLAGMA CYATHIGERUM (Charpentier). 



This species lives in the lake and in places fairly swarms along 

 the beaches. 



9. COENAGRION RESOLUTUM (Hagen). 



Several were taken around a boggy pool near the lake outlet. 



10. AMPHLIGRION SAUCIUM ABBREVUTUM Selys. 



Occasional. 



11. ISCHNURA CERVULA Selys. 



Abundant in the lily pads near the outlet of the lake. 



12. ISCHNURA PERPARVA Selys. 



With the preceding, but less <-.ommon. These two are at the 

 extreme upper limit of their range. 



13. OPHIOGOMPHUS MORRISON! Selys. 



This was very abundant along the north shore on the finer gravel 

 and also around the outlet. Over a hundred specimens were taken 

 (see p. 534). 



14. GOMPHUS DONNERI Kennedy. 



This was abundant on the sandy beach at the west end of the 

 lake. Probably it was past its season, as only two females were 

 caught. This species, which is closely related to Gomphus sohrinus 

 Selys, seems to be either peculiar to this lake or a species not yet 

 recorded from elsewhere. It is one of the surprises, as most Gomylii 

 live in the larger, warm rivers. Probably this is the highest eleva- 

 tion (5,940 feet) at which the genus has been recorded in North 

 America. 



15. ANAX JUNIUS (Drury). 



One individual was seen several times on Doniicr (^rcek near the 

 outlet to the lakes. This is on the extreme upper limit of this 

 species' habitat. 



16. AESHNA PALMATA Hagen. 



Three males of this were caught on Donner Creek. It was not 

 abundant. Exuviae were found in Donner Creek. 



17. AESHNA INTERRUPTA NEVADENSIS Walker (?). 



Females of Aeshna interrupta Walker were taken near the outlet 

 of the lake. Probably these were of the variety nevadensis Walker. 



18. TETRAGONEURIA SPINIGERA Selys. 



Several were caught on the Donner Lake road. 



19. LIBELLULA PULCHELLA Dmry. 



Several caught on Donner Creek. This is near the upper limit of 

 this species. 



