140 



Smith and Pritchard: Odonata 



Canada, northern U.S. to Colorado and California 



(=uncatus Kirby 1890) dryas Kirby 1890 



— Body black; abdomen 30-34 mm. long (California) 



stultus Hagen 1861 



4. Ventral abdominal appendages (as seen from above) 

 sigmoid, the tip directed outward (fig. 4:68/) (Canada 



Fig. 4:66. Wings of Zygoptera. a, Chromagrion conditum; b, 

 Amphiagrion saucium; c, Neha/enn/a Irene (Walker, 1953). 



The eggs aestivate through the summer and hatch 

 when the pools are filled in the fall. 



The naiads move quickly with sweeps of the broad 

 gills. Some of the species can develop in temporary 

 water. 



Key to California Species 

 Males 



1. Ventral abdominal appendages reaching end of median 

 expansion of dorsal abdominal appendages 2 



— Ventral abdominal appendages falling well short of end ° 

 of median expansion of dorsal abdominal appendages 

 (fig. 4:68c) (Canada and northern U.S. to Texas and 

 California) congener Hagen 1861 



2. Ventral abdominal appendages expanded distally (fig. 

 4:68d,e) 3 



— Ventral abdominal appendages with distal part slender Fig. 4:67. Wings of Zygoptera. a, Coenagri'on 'resolution (ac, 

 (fig. 4:68a,/) 4 anal crossing); b, Enallagma borea/e; c, I schnura perparva; d, 



3. Body metallic green; abdomen 26-28 mm. long (Alaska, Anomalagrion hastatum (Walker, 1953). 



