116 



Smith and Pritchard: Odonata 



Fig. 4:17. Adult characters in the genus Ophiogomphus. a, O. bison; b, O. morrisoni; c, 0. 

 morrisoni nevadensis; d, 0. scverus montanvs; e, 0. severus; f, 0. ari'zoni'cus; g, 0. occic/ent/s; 

 n, 0. occidentis californicus; 1, color pattern; 2, hamules; 3, valva; 4, occiput of female; 5, dor- 

 sal view of male abdominal appendages; 6, lateral view of male abdominal appendages (Kennedy, 

 1917). 



Key to California Species 



Males 



1. Superior appendages with a dorsal angulation (California 



to Texas and Oklahoma) . . . lampropeltis Kennedy 1918 



— Superior appendages without a dorsal angulation (Oregon 



and California to Wyoming and Texas) 



compositus Hagen 1858 



Females 



1. Occiput with caudal margin emarginate medially 



lampropeltis Kennedj 



— Occiput with caudal margin trilobed 



comp ositus Hageri 



