148 



Smith and Pritchard: Odonata 



Fig. 4:85. Lateral view of male abdominal appendages 

 of Enallagma anna (Celeste Green). 



2. Mesostigmal lamina with a broadly scooped-out hollow 

 diagonally across each lateral lobe (fig. 4 :86a, e) ... 3 



— Mesostigmal lamina with the diagonal ridge very 

 narrowly interrupted at most 5 



3. Mesostigmal lamina with a deep hollow at the inner- 

 anterior end of each lateral lobe (fig. 4:86c) 



cyathigerum 



— Mesostigmal lamina without an obvious hollow on the 

 lateral lobe (fig. 4:86a) 4 



4. Abdominal segment 8 with black markings; humeral 

 stripe without an abruptly narrowed section (fig. 4:86a) 



boreale 



— Abdominal segment 8 entirely blue; humeral stripe 

 abruptly narrowed on caudal part clausum 



5. Mesostigmal lamina with posterolateral margin sharply 

 elevated and lobelike carunculatum 



— Mesostigmal lamina with posterolateral expansion nearly 

 flat civile 



Fig. 4:83. Caudal gills of Enallagma naiads, a, clausum 

 fa, carunculatum; c, civile; d, ebrium; e, boreale; f, cyathigerum, 

 g, vernale; h, geminatum (Walker, 1953). 



Fig. 4:84. Lateral views of male abdominal appendages of 

 Enallagma. a, clausum; fa, cyathigerum; c, civile; d, praevarum; 

 e, boreale; f, carunculatum (Celeste Green). 



Fig. 4:86. Mesostigmal laminae of females, a, Enallagm' 

 boreale; b, Coenagrion resolutum; c, Enallagma cyathigerur 

 (Celeste Green). 



