232 PHILIP p. CALVERT. 



L.estes vigilax Selys (PI. Ill, fig. 17). 



L. V. Selys, Bull. Ac. Belg. (2) xiii, p. 306, 1862. 



% . Metallic green. Lips blue or yellow. Thorax with mid-dorsal carina, a 

 narrow humeral stripe and sides inferiorly, yellow. Posterior abdominal seg- 

 ments blackish. Sup. app. on inner side with a basal, moderately acute tooth fol- 

 lowed by two round tubercles. Inf. app. very slender, exceeding the second tubercle, 

 apices not dilated. Old % with rear of head, sides of thoraS, 9-10. pruiuose. 



9 . Unknown. 



Abd. % 34.5-38. H. w. I 21-25. 



One I , Pa. (A. E. S.) Morris Co., New Jersey, July 10, by C. 

 W. Johnson (W. I., C). Massachusetts (Hitchings). 



C. % . Inf. app. longer than sup. app. Rear of the head {% 'i ) yellow. 

 7. L,estes iiiequali!$ Walsh (PI. Ill, fig. 24). 



L. i. Walsh, Proc. Ac. Phila. 1862, p. 385. 



Metallic green. Lips pale brown or blue. Mid-dorsal thoracic carina and a 

 humeral line yellow or black. Sides of thorax inferiorly yellow. 



'^ . Sup. app. on inner side with an acute basal tooth, folloioed by a somewhat 

 convex denticulated edge, and a rather flat, rounded tubercle. Inf. app. a little longer, 

 very slender, straight, apices curved upwards and inwards, not dilated. 



9. Humeral stripe wider below, 9 sometimes with two dorsal yellow spots. 

 Old 9 with rear of head, 9-10, pruinose. 



Abd. I 36-42, 9 35-40. H. w. % 25-26.5, 9 25-27. 



Ditches, Tinicum Is., Pa., June 24, July 22, by P. P. Calvert (C) ; 

 not abundant. 



Maine, New Hampshire, New Jersey, Illinois (Harvey, Mrs. Slos- 

 son, C. W. Johnson). 



4. Argia Rambur. 



Bambur, Nevr. p. 254, 1842. Selys, Bull. Ac. Belg. (2) xx, p. 382, 1865. 

 A. More than one cell lying immediately beneath the pterostigma. 

 8. Argia putricia Hagen. 



Agrion p. Hagen, Syn. Neur. N. A., p. 96, 1861. Argia p. Selys, Bull. Ac. Belg. 

 (2) XX, p. 38.5, 1865. 



Rear of the head blackish. 



% . Head and thorax clay-colored. Thorax with a mid-dorsal baud, a humeral 

 line and a post-humeral stripe confluent below, and a line on the second lateral 

 suture, black. Abdomen black, a pale, transverse, basal ring on 3-7; sometirjes 

 a pale dorsal spot on 9. Old % mostly pruinose. Hind margin of 10 excised, 

 sides of excision thickened, elevated and produced backwards as a small process 

 on either side overhanging, but shorter than, the sup. app. Sup. app. one-third 

 as long as 10, blunt. Inf. app. two to three times thicker, obtuse, usually lousier, 

 apex entire. 



9 . Head and thorax pale green. Thorax with mid-dorsal carina, sometimes 

 the lateral sutures, or even a mid-dorsal band, black. Abdomen green, an inter- 

 rupted black stripe each side. 



Abd. I 30-37, 9 29-37. H. w. % 23-26.5, 9 24-28.5. 



