NORTH AMERICAN ODONATA. 239 



truncHted from below upwards and backwards (distally), a small tooth at the 

 inferior angle, extreme (upper) apex forming a small hooli on the inner side. 

 Inf. ajip. half shorter, slender, simple, curved inwards. 



9. Blue or yellow. Dorsum of 1-9 metallic brown, narrower at or absent on 

 apex of 9, of 10 yellow : a transverse basal yellow ring on 3-7. 

 Abd. % 26-30, J 24-27.5. H. w. % 16-18, ? 17-20. 



Tinicuni Is., Primes, Del. Co., Pa. ; Fort Mifflin, Phila., etc., June 

 11 — July 11, Aug. 31, by P. P. Calvert; ovipositing or in coitu 

 June 17, July 5, 11. 



Maine, Massachusetts, Maryland, Georgia, Louisiana, Illinois 

 (Harvey, Hitchings). 



Euallagnia pollutum Hagen (PI. Ill, f g. 27). 



Agrion p. Hagen, Syu. Neur. N. A., p. 83, 1861. E. p. Selys, Bull. Ac. Belg. 

 (2) xli, p. 527, 1876. 



Very similar to E. signatum. %. Sup. app. hardly longer than 10, upjier side 

 curved upwards, lower side divergent, so that the height of the apex (profile 

 view) is twice as great as at base; upper apical angle more prominent. 



9 • N^ot as yet separable from that of signatum, as the characters suggested by 

 de Selys — that pollutum has a black line on the second lateral suture which is 

 wanting in signatum, and a diflFerence in width in the dorsal abdominal band — 

 are not constant. 



Abd. % 22.5-26.5, 9 22.5-23.5. H. w. % 13.5-16.5, 9 15.5-16. 



Maine (Harvey), Florida. 



9. Ischuura Charpentier. 



Charp. Lib. Eur. p. 20, 1840. Selys, Bull. Ac. Belg. (2) xli, p. 258, 1876. Mi- 

 cronymphc Kirby, Cat. Odon. p. 140, 1890. 

 21. l!<ichiiura verticalis Say. 



Agrion v. Say, Journ. Ac. Phila., viii, p. 37, 1839. A. v., A. Bamburii Hagen, 

 Syn. Neur. N. A., p. 82, 76, 1861. I. v. Selys, I. c. p. 265, 1876. 



% . Black. Frons, lips, postocular spots, rear of head, a narrow antehumeral 

 stripe (rarely interrupted at its middle), sides of thorax, blue or green. A black 

 line below one or both wings. 3-7 with an interrupted basal yellow ring; 8-9 

 blue icith a black stripe each side. Sup. app. one-fourth as long as 10, lamellate. " ', 

 Inf. app. a little longer, rather thick at base, outer lower side prolonged to form — C*— «i-i 

 the acute apex, which is curved inwards, not divided. Pterostigma of front 

 wings black, of hind wings yellowish brown. 



Black 9- Colored like % (teueral), or greater part of body pruinose, a, trans- 

 verse, apical, black ring on 3-7, 8-10 blackish. Pterostigma of all the wings 

 yellowish brown. 



Orange 9- Blue of head replaced by orange, postocular spots conduent with 

 rear of head. Thoracic dorsum orange, a median band and a humeral stripe, 

 black. 1, 2 and base of 3 orange on dorsum, remainder of abdomen black, 4-7 

 with an interrupted basal ring. Pterostigma yellowish brown on all the wings. 



Abd. 1 19.5-22.5, Bl. 9 17.5-23.5, Or. 9 18.5-22.5. H. w. % 11.5-14.5, Bl. 9 

 13.5-17, Or. 9 12.5-17.5. 



TKANS. AM. ENT. SOC. XX. .SEPTEMBER, 1893. 



