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PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 49. 



angle of a diamond marking at the base of the posterior lobe. Legs 

 pale brown except narrow black stripe on outer surface of tibiae. 



Mesothorax and metathorax pale brown, except as follows: Broad 

 middorsal stripe (in some individuals a mere line); a spot on the 

 anterior end of mesepimeron; dorsal end of })oth humeral and second 

 lateral sutures narrowly black. Legs as in pro thorax. 



Figs. 106-109.— Ischnura cervula. 100. Teneral female with light coloration. 107. Teneral 

 female with dark coloration. 108. female with very dark coloration which 

 approaches male coloration. 109. male coloration. 



Abdomen pale brown, except as follows: Segment 2 with a diamond- 

 shaped, or in some individuals a spade-shaped spot on posterior end 

 of dorsal surface; segments 3 to 7 each with dorsal surface black, 

 except for a narrow pale interrupted band across the anterior end; 

 segment 8 pale blue, usually with small lateral mark; segments 9 and 

 10 with dorsal surface black, the black extending down in a narrow 

 stripe on either side of the anterior end. 



