240 PHILIP p. CALVERT. 



Very common; sti-eams and ponds around Phila., earlier than 

 May 1— Oct. 16. Ovipositing May 1, 19, 30, June 22, 29. July, 

 Aug. 31, Sept. 7. 



Quebec to Georgia, west to Missouri and Louisiana. 



SS. Iscliiiura Raiiiburii Selys. 



Agrion R. Selys, Rev. Odou. d'Eur. p. 186, 18.50; I. B. Bull. Ac Belg. (2) .-li, p. 

 272, 1876. Agrion iners, tuberculatum, credidum Hagen, Syn. Neur. N. A., p. 75, 

 76, 80, 1861. 



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

 stripe, sides of thorax, blue or green. A black line on the second lateral suture. 

 .3-6 with an interrupted, transverse basal yellow ring; 8 blue. Sup. ajip. one- 

 third as long as 10, apex bifid, inner branch bent down to form an inferior pro- 

 cess. Inf. app. a little longer, thick at base, apex slender, not divided, curved 

 inwards. Pterostigraa of front wings black in the centre, of hind wings yellowish 

 brown. 



Black J. Colored like the % . Pterostigma of all the wings yellowisli brown. 



Orange 9. Blue or green of head replaced by orange, postocular spots con- 

 fluent with the rear of the head. Thoracic dorsum orange (sometimes olive), a 

 broad median black band, but no humeral stripe. 1 and base of 2 orange, remainder 

 of abdomen black, an interrupted, transverse, basal, yellow ring on 3-7. Pter- 

 ostigma of all the wings yellowish brown. 



Abd. % 21-28, Bl. ? 22.5-27, Or. 9 22-27. H. w -^ 13-17, Bl. 9 15-19, Or. 

 9 15.5-18. 



Tinicum Is., Crum Creek, Pa., Aug. 23 — Sept. 4. 



Quebec, Ontario, New York to Florida ; Louisiana, Texas, Mexico, 

 West Indies, Venezuela, Peru (Provancher, Pettit, Johnson,). This 

 species replaces /. verticalis, to a great extent, on the sea-shore. 



10. Anoiualagrion Selys. 



Selys in Sagra's Hist. Cuba, Ins. p. 469, 1857; Bull. Ac. Belg. (2) xli, p. 254, 

 1876. 



33. Aiioinalngrioii hsistatuin Say. 



Agrion h. Say, Journ. Ac. Phila. viii, p. 38, 1839. Anom. h. Selys, I. c. p. 255, 

 1876. 



%. Orange or yellow. The following dark metallic green, blue, or purple: 

 vertex, nasus, a broad mid-dorsal thoracic and a wide humeral stripe, a mark at 

 second lateral suture and very variable markings on base and apex of 1-7. Sup. 

 app. half as long as 10, bifid, inner branch longer, bent downwards. Inf app. a 

 little longer, apex slender, curved inwards. Pterostigma on front wings reddish, 

 not touching the casta ; on hind wings black, normal. 



Black 9 (not seen by the writer). Head and thorax as in %. abdomen black, 

 3-6 with an interrupted, transverse, basal, yellow ring. Pterostigma normal, 

 yellowish brown (Selys). 



Orange 9- Postocular spots confluent with orange of rear of the head. Tho- 

 racic dorsum orange, with a broad median metallic green stripe; sometimes a 



