No. 39] ODONATA OF CONNECTICUT: COENAGRIONIDAE 99 



yellow, post-coxal areas buff without black marks ; femora striped, 

 tibiae with a single dark stripe which covers the segment distally ; 

 wings clear; postnodals 11-14 and M^ usually arising between the 

 second and third postnodal in each wing ; stigma surmounting two 

 cells. 



Abdomen: brown to black (sometimes with a greenish tint) 

 and yellow; dorsum of terga 1-7 more or less dark in color, the 

 lateral margins pale, terga 8-10 black; anal appendages blackish 

 brown, the superiors with spinose lateral surfaces, the mesal 

 margins having two nearly equal teeth ; inferiors flat, placed hori- 

 zontally and slightly swollen at the base and apex. 



Female. — Color similar to the male. 



Head : similar to the male. 



Thorax : without the black mark on the metapleural suture, and 

 the mesokatepisternum largely pale. 



Abdomen : the brown of the terga more confined to the dorsal 

 surfaces, the lateral surfaces mostly yellow ; ovipositor extending 

 to or well beyond the apex of segment 10. 



Measurements : total length, male 32-37, female 35-37 mm. ; 

 length of abdomen, male 25-30. female 27-28 mm. ; length of hind 

 wings, male 17-20, female 19-22 mm.; width of hind wings, male 

 4-4.5, female 4.5 mm. 



Older males are sufficiently characterized by the black mark on 

 the metapleural suture, but this may be wanting in younger indi- 

 viduals and in the female. The pale stripe of the mesopleural 

 suture is not usually contracted caudad as in forcipatus and rectan- 

 gularis, the nearest allies. PI. i, Fig. 5 shows a tracheal gill of 

 a nymph obtained from Dr. Howe, 



Connecticut. — West Thompson, 12 July, 1905 (H. L. V.). 

 New England. — June 21-September 23. 



Lestes eurinus. Say 



Journal of the Academy of Natural Sciences of Philadelphia, 8: 36: i839- 



Nymph. — Gills similar in shape to L. vigilax (PL i. Fig. 4) ; 

 lateral keels with apical spines on 3-9 ; mental setae 5, laterals 3 ; 

 mentum narrow at base ; teeth of the distal margin of median lobe 

 truncate at apices. 



Measurements : length of gills, 9.5 mm. ; width of gills, about 

 1.5 mm. 



Adult, male, — Color metallic green and yellowish buff. 



Head : metallic green ; mouth parts buff ; postclypeus black ; 

 anteclypeus, exposed portions of the mandibles, and genae, brown 

 or greenish yellow ; front, vertex, and all of the occiput and post- 

 genae. metallic green or black ; eyes dark brown. 



Thorax : metallic green and buff ; pronotum metallic green, 

 sometimes poUinose, the caudal and cephalic lobes black with age ; 



