386 PROCEEDINGS OF THE ACADEMY OP 



the wings; sternum -yellowish. Abdomen towards the base with a bluish re- 

 flection ; the basal half of joint 1 and a narrow interrupted basal band on 2 

 to about 6, and also on 10, yellowish ; a lateral yellowish vitta obsolete from 

 the middle of joint 5 to the tip of joint 8 ; joint 10 deeply emarginate at tip, 

 and with a yellowish terminal band. Superior appendages a little longer than 

 the last abdominal joint, regularly tapering to their tips inside and outside, 

 curved from their middle inwards and downwards, yellowish at base, brown- 

 black at tip, with seven or eight small black spines externally towards their 

 tip; at their internal base is an acute spine pointing backwards, immediately 

 behind which is a narrow but deep emargination, followed by a fine serration 

 and a very small obtuse tooth, the tooth placed at two-thirds the dhtance to 

 their tip. Inferior appendages extending one-third of a millimetre beyond 

 the superiors, yellowish and of a flattened conical shape at base, brown-black, 

 slender and cylindrical at tip, straight till they attain the tips of the superiors, 

 when they suddenly curve inwards and upwards, their tips obtuse and approxi- 

 mate ; their internal edge, at about one-fourth the distance to their tips, is 

 suddenly contracted, making a conspicuous rectangular tooth. Legs yellowish, 

 femora with an inferior, anterior and superior black vitta ; tibiae with an in- 

 ferior black vitta, on the anterior tibiae an anterior one also confluent with the 

 inferior ; tarsi black. Wings hyaline ; veins and cross-veins black ; pterostigma 

 pale brown, surmounting 2 3 cells. Postcubitals 16. 



The 9 differs from <$ only in the lateral abdominal vitta being uninter- 

 rupted, and in the two last abdominal joints being varied with yellowish, the 

 penultimate containing two small, round, discal spots, transversely placed. 

 The superior 9 appendages are elongate-conical and acute, three-quarters the 

 length of the last abdominal joint; the inferiors a little shorter, conical, ob- 

 tuse and directed upwards; and the vulvar laminae are externally serrate under 

 the lens. Postcubitals 15. 



Length $ 52 mill. ; 9 51 mill. Alar expanse $ 60 mill. ; 9 62 mill. Abd. 

 $ 42 mill. ; 9 40 mill. Pterostigma $ 9 2 mill. Differs from all described 

 North American species in the great length of the inferior $ appendages, and 

 from all but grandis and Eurina ? in having 15 16 postcubitals. It agrees 

 with forcipata, Rambur, in having three distinct femoral vittae. 



Agrion irene, Hagen. A Ramburii, Selys. A. exsclans, Hagen, (R. I. and 

 Chicago.) A. putriddm, Hagen. A. apicale, Say, (= immundum, Hagen.) 

 A. civile, Hagen. 



Agrion , Hagen MSS., n. sp. $ Black, with a slight brassy tinge. 



Head and thorax villous. Head with two transversely elongated occipital spots, 

 a broad band between the antennae, the epistoma, and also the labrum, all ob- 

 scure greenish ; all below pale greenish. Posterior margin of prothorax rounded ; 

 dorsum of the thorax with a broad sublateral blue or obscure greenish stripe ; 

 pleura with a short black median line above, between the wings, sometimes dull 

 blue sometimes obscure green, with a strong metallic reflection so as to exhibit, 

 in certain lights, the appearance of a broad yellow stripe before and behind : 

 sternum pale, more or less pruinose. Abdomen vivid blue in the mature living 

 insect, pale greenish brown in immature specimens ; on joint 1 a basal 

 quadrangular black spot; on joints 2 7 an obhastiform terminal black spot, 

 one millimetre long in 2 5, covering two-thirds of the length in 6 and the 

 entire length in 7 ; joint 10 widely emarginate at tip, and with a quadrangular 

 laterally emarginate black spot covering its upper surface. Superior appen- 

 dages robust, short, black, polished, incurved and truncate at tip when viewed 

 from above ; when viewed in profile tapering and curved upwards, and with a 

 small pale tubercle attached inside to the base of each. Inferior appendages 

 pale at base, black at tip, slender, acute, a little longer than the superiors, 

 sometimes with a terminal unguiculus. Legs pale, femora and tibiae with an 

 anterior black vitta; tarsi with their tips and incisures black. Wings hyaline, 

 pterostigma black, or when immature pale brown. Postcubitals 9 11. 



[Sept. 



