118 



Smith and Pritchard: Odonata 



Fig. 4:21. Wings of Ocrogomphus specular! s 

 (Needham and Westfall, 1955). 



Kennedy (1917) writes with regard to Gomphus 

 intricatus: "As with most species of Gomphus this 

 species spends much of its time seated on some bush 

 or piece of driftwood, rarely alighting on the ground. 

 However, when it is on the wing it is very energetic, 

 and the males fly rapidly back and forth in short 

 beats, about six inches above the surface of the water. 

 The females oviposit while flying in the same quick, 

 nervous manner. In copulation the male picks the 

 female up either from over the water or from some 

 bush, and after a very short nuptial flight settles for 

 a very long period of copulation." 



Key to California Species 

 Males 



1. Posterior hamule stout, sharply bent forward near distal 

 end (Washington to California) (figs. 4:23; 4:24) 



confraternus Selys 1876 



— Posterior hamule slender, tapering distally 2 



2. Tibia yellow externally; club of abdomen bright orange 



Fig. 4:23. Gomphus confraternus donneri. a, vulvo; b-c, lateral 

 view of male abdominal appendages; d, second abdominal segment 

 of male; e, dorsal view of male abdominal appendages; f, female 

 occiput; g, ventral view of male abdominal appendages; h, color 

 pattern of male; /', color pottern of female (Kennedy, 1917). 



(British Columbia to California, east to Nebraska and 



Texas) (figs. 4:25a; 4:26) intricatus Hagen 1858 



— Tibia black; club of abdomen pale yellowish and largely 



black dorsally (British Columbia to Utah and California) 



(= olivaceous nevadensis Kennedy 1917) (fig. 4:25d,/) 



olivaceous Selys 1873 



Females 



1. Tibiae black 2 



— Tibiae with outer face yellow I 



intricatus Hagen 



2. Thorax with dark lateral stripe (figs. 4:23; 4:24) 



confraternus Selys 



— Thorax without lateral stripe (fig. \:2be,g) 



olivaceous Selys 



Naiads 



Fig. 4:22. Wings of fcTrpetogomphus coluber 

 (Needham and Westfall, 1955). 



1. Dorsal groove present on segments 3-7; concave inner 

 edge of lateral lobe of mentum with 1-3 rounded teeth 

 (fig. 4:27a-6) 2 



- Dorsal groove absent, but apex of segments 2-7 with 

 low rounded middorsal tubercle; inner margin of lateral 

 lobe of mentum with 6 or more low rounded teeth followed 

 by smaller ones (fig. 4:270-0") confraternus Selys 



2. Segment 9 with no median spine; anal appendages 



