KELLICOTT. 41 



sternal membrane black ; there is an apical ring on 1 ; 3 

 -7 have a basal pale blue ring with a wide interruption 

 dorsally ; on 8 there is a large blue spot on either side, 

 these are separated dorsally by a black line of varying 

 width; the appendages are black, the valves pale or 

 faded brown. 



This pretty and smallest species of the genus in our 

 area is abundant from the latter part of May until 

 well into September; it occurs in all parts of the state 

 and has been taken from New York to Illinois. The 

 females are often as deeply colored as the males. Both 

 sexes may be found in the warmest part of the day fly- 

 ing low over floating herbage. 



The female oviposits very much like Ischnura 

 verticalis among algae and debris at the surface of still 

 water. 



Enallagma doubledayi, Selys. 



Length-: of abdomen cf 25, 9 24; of hind wing of 

 c? 17, 9 18. 



The male is blue and black. Head black with 

 lower part of face blue, a black line on clypeo-frontal 

 suture; prothorax black, posterior edge blue, thorax 

 with usual mid-dorsal and humeral black stripes, legs 

 with blue and black, tarsi black, pterostigma black ; 

 abdomen much like that of hageni : first ring with 

 small basal patch on dorsum, on 2 a shield-formed one 

 with apical ring, 3-5 with apical one third black, 6 two 

 thirds, all of 7 and 10. 



The female differs from the male as follows ; on the 

 thorax and head she is yellowish, where the male is 

 blue, her legs are pale with the apical half of the 

 femora blackish outwardly and her abdominal seg- 

 ments are green above. 



The abdominal appendages of the male are short 

 projecting beyond 10 equal to half of its length ; the 

 superiors arise from a broad oblique base, become 



