2o8 PHILIP p. CALVKKT. 



B. %, ^ . A dorsal black band on 2 for its entire length. Usually 3 antenodal cells. 

 9 ivith dorsinn of 10 blue, green, or yellow. 



18. l<:iiHllagma divagaiis Selys, (PL III, figs. 25, 26). 

 E d. Selys, Bull. Ac. Belg. (2) xli, p. 521, 1876. 



Cuneiform postocular spots alnjost connected. Vertex, a mid-dorsal thoracic 

 and a humeral stripe, black. 



'J,. Blue, dorsum of 1-7, 10, black; an interrupted transverse basal blue ring 

 on 3-7. Sup. app. shorter than 10. not bifid, Init with inner lower side produced 

 (= lower branch of exsulans). Inf. app. a little longer than sup. app., apices curved 

 inwards. 



9 • Yellow or blue. Mid-dorsal thoracic carina, and a stripe superimposed upon 

 the humeral stripe (so that the black thereof is reduced to a line on each side of 

 the red), reddish. Dorsum of 1-8 dark metallic green or black ; basal half of 9 

 with a dark spot, which is bifid posteriorly . 10 pale dorsally. 



Abd. % 19.5-24.5, ? 22-28. fl. w. % 14 17, ? 18-20. 



One ^19, Little Cruni Creek, Ridley Twp., Del. Co., Pa., in 

 company with E. exsulans, July 3, 1893, by P. P. Calvert (C) ; 2 

 % , Pa., June 16, probably by S. F. Aaron (A. E. S.). 



Massachusetts (Selys). 



19. Eiiallagma exsulans Hagen (PL III, fig. 29). 



Agrion e. Hagen, Syn. Neur. N. A., p. 82, 1861. E. e. Selys. Bull. Ac. Belg. (2) 

 xli, p. 522, 1876. 



(Juneiform postocular spots almost connected. Vertex, a mid-dorsal thoracic 

 and a humeral stripe, black. 



%. Blue or green, dorsum of 1-8, 10, black; a transverse basal blue or yellow 

 ring on 2-7. Sup. app. shorter than 10, bifid, upper branch half shorter than the 

 lower. Inf. app. as long as the upper branch, directed upwards. Hind margin of 

 10 somewhat elevated and bifid, but not as much as in Ischnura. 



9 . Yellow, lilac, blue or green. Mid-dorsal thoracic carina and a stripe super- 

 imposed upon the humeral stripe (so that the black thereof is reduced to a line on 

 each side of the red), reddish. Dorsum of 1-9 dark metallic green or black, 

 narrower at or absent on apex of 9 but not bifid, of 10 blue or green. 



Abd. I 24-30, 9 24.5-28.5. H. w. % 16.5-19.5, 9 18-20.5. 



Darby, Cruni and vStone Creeks, Tinicum Is., Pa., June fi — Aug. 

 17 ; ovipositing June 28, July 6, 15. 



Maine, New York to Virginia, Illinois, Texas (Miss Wadsworth, 

 Calvert). 



SO. Enallagma sigiiatum Hagen (PI. Ill, fig. 28). 



Agrion s. Hagen, Syn. Neur. N. A., p. 84, 1861. E. s. Bull. Ac. Belg. (2) xli, p- 

 525, 1876. 



Cuneiform postocular spots connected. Vertex, a broad mid-dorsal thoracic 

 and a humeral stripe, black or metallic brown. 



% . Blue or yellow. Dorsum of 1-8, 10, metallic brown or black; a transverse, 

 basal blue or yellow ring on 3-7. Sup. app. a little longer than 10, compressed, 

 superior margin straight, inferior margin very slightly divergent, apex obliquely 



