492 



This species occurs in the same localities in which forcipatus is 



found. Nynijihs taken at Urbana emerged as early as May 29 and as 

 late as Jul\- 17, the species ha\ing a considerable range in the ])eriod 

 of emergence. There is a possibility that this species has a two- 

 brooded life cycle. 



Specimens have been seen from Urbana, Galena, Lake Villa, Ore- 

 gon, Savanna, and McHenry County. 



Lestes uncatus Kirby 



Nymph. — Color, buff or green. 



Head broad, the caudo-lateral margins not projecting and with- 

 out heavy setae; antennae of the usual Lestes type; mental setae six 

 or seven on each side; lateral seta three, two of which are located on 

 the distal segment ; marginal setae of the mentum extending to the base 

 of the expanded portion of the median lolje; labium, when folded, ex- 

 tending caudad of the metacoxae. 



Thorax : legs very long and slender, the apices of the femora 

 and the apices of the tibiae and the distal half of the third tarsal seg- 

 ments brown; wing-cases extending to the middle of the fourth ab- 

 dominal segment. 



Abdomen with well-developed lateral keels wliicl: are provided 

 with short spines on the apices of segments 5-Q; cuticle uniform in 

 color, the dorsum of segments nine and ten and the venter of segment 

 ten with long, fine, silken hairs ; ovipositor of the female long and ex- 

 tending lieyond the apex of tlie eleventh segment ; gills conspicuously 

 contracted beyond the middle as in rcctaiu/iilaris and forcipatus, ratlier 

 sharply pointed at the ajjcx, the point similar to that of nngiiicuhitus. 



Measurements 



Length 18 mm. 



■Length of abdomen 11 mm. 



Length of gills 8 mm. 



Width of gills 2 mm. 



Length of median lobe 5.5 mm. 



Width of median lobe 3-1.6 mm. 



Described from a single specimen collected by Dr. Edna Mosher 

 in July, 191 5, at Orono, Maine. 



Adult; Male. — Color, metallic green and pale yellow. 



Head dark green above, pale below; occiput black, the median 

 lobe of the labium pale and subquadrangular with a typical cleft; 



