% 



NO. 2192. DRAGONPLTES, CALIFORNIA AND NEVADA— KENNEDY. 597 



20. MACROMIA MAGNIFICA Mc Lachlan. 



Abundant during May, 1914. These emerged in numbers, the 

 exuviae being common in the grass roots two feet above the stream. 

 In 1914 the emergence took place before May 10. Few were seen in 

 1915. 



21. LIBELLULA SATURATA Uhler. 



Common. 



22. PLATHEMIS LYDIA (Drury). 



Common. 



23. ERYTHEMIS SIMPLICICOLLIS (Say), 



Common. 



24. SYMPETRUM CORRUPTUM (Hagen), 



Occasional. 



25. SYMPETRUM ILLOTUM (Hagen). 



Common. 



SAN LORENZO RIVER, SANTA CRUZ, CALIFORNIA. 



This is a stream less than 20 miles long, which flows down the 

 heavily timbered west slope of the Coast Range and empties into 

 Monterey Bay at the town of Santa Cruz. I collected on Zyante 

 Creek, where I saw no imagoes but foimd every stream-side tree and 

 log covered with the exuviae of OctogompJius and Cordulegaster. The 

 adults of these had evidently migrated farther up stream. The other 

 species were taken on the San Lorenzo in the rocky gorge between 

 Big Trees and Rincon, the best collecting being in the vicinity of 

 Rincon. Probably the best collecting in the San Lorenzo is in the 

 open vaUey towards Felton, above Big Trees, which part of the 

 stream I did not visit. 



1. HETAERINA AMERICANA (Fabricius). 



Common below Big Trees. 



2. ARGIA EMMA Kennedy. 



Common from Big Trees to Rincon. 



3. ARGIA VIVIDA Hagen. 



Occasional below Big Trees. 



4. ENALLAGMA CARUNCULATUM Morse. 



Occasional below Big Trees. 



5. ENALLAGMA CYATHIGERUM (CharpenHer). 



Common below Big Trees. 



6. ENALLAGMA PRAEVARUM (Hagen). 



Occasional below Big Trees. 



7. ZONIAGRION EXCLAMATIONIS (Selys). 



Common below Big Trees. 



8. CORDULEGASTER DORSALIS Hagen. 



Exuviae very abimdant on middle reaches of Zyante Creek. No 

 imagoes seen at all and no exuviae found below the swift water in 

 the Zyante. The imagoes had emerged and evidently migrated 

 farther up the creek. 



