No. 39] ODONATA OF CONNECTICUT: COENAGRIONIDAE lOI 



of the mesocoxae, not usually reaching the metacoxae; mental 

 setae 5-6, laterals 3. 



Thorax : about as long as broad, brown ; legs slender, femora 

 all with subapical rings and several rows of setae ; tibiae with 

 dark brown apices ; tarsi with apical half or more of the last 

 segment, also the claws, dark brown; metathoracic wing-cases 

 extending to the middle of the third abdominal segment. 



Abdomen: lateral keels with apical spines on segments 5-9; 

 terga darker than sterna, the venter with a dark line beneath each 

 lateral keel, two spots at apex of 3-8 or 1-8; sternum of segment 

 10 hairy; gills spatulate, broadest just proximad of the middle, 

 three or four times as long as broad ; tips rounded or obtusely 

 pointed and dark, and two dark cross-bands proximad of the tip; 

 gills sometimes nearly black. 



Measurements : length, 19-20 mm. ; length of abdomen, 14 mm. ; 

 length of gills, 7-9 mm. ; width of gills, 2-3 mm. ; length of 

 median lobe, 3.5-4 mm.; width of median lobe, .5-1.7 mm. 



Adult, male. — Color dark brown and yellow. 



Head : brown and buff. Antennae dark brown with a short 

 basal segment and a much longer second segment; anteclypeus 

 and labrum pale yellow or greenish, also mandibles and trochan- 

 tins, genae and front to the f ronto-clypeal suture ; vertex and 

 remainder of front dark brown ; occipital and postgenal regions 

 largely dark brown or black, pollinose with age. 



Thorax : brown and yellow ; median lobes of the pronotum 

 each with an irregular H-shaped mark ; stigmal plates brown and 

 black ; pleural sutures and dorsal carina pale, the mesopleural pale, 

 stripe but little contracted caudad and becoming bluish with age ; 

 legs striped yellow and black, the tarsi and claws uniform brown 

 or black; wings with lo-ii postnodal cross-veins, and M^ arising 

 between the third and fourth of these in the front wing. 



Abdomen : dark brown, often with a trace of metallic green ; 

 dorsum of terga i-io brown, the brown widened subapically on 

 2-6, enclosing a lateral yellow spot on 3-6 ; segment 9 black except 

 small lateral yellow spots; anal appendages consisting of broad 

 superiors which are coarsely tuberculate laterally and have two 

 strong mesal teeth ; inferiors nearly as long as superiors, flattened 

 and placed horizontally, and slightly swollen at apices. 



Female. — Color similar to the male. 



Abdomen : without the lateral enclosed yellow spots of 3-6 ; 

 ovipositor extending caudad of segment 10. 



Measurements : total length, male 44, female 39-41 mm. ; length 

 of abdomen, male 30, female 29-32 mm. ; length of hind wings, 

 male 23-24, female 24 mm. ; width of hind wings, male 5, female 

 5 mm. 



Connecticut. — New Haven, 26 June, 1902 (E. J. S. M.), 20 July, 1904 

 (W. E. B.) ; Hamden (Lake Whitney), 17 June, 1904 (H. L. V.). 

 New England. — June 17-September 5. 



