No. 39] ODONATA OF CONNECTICUT: LIBELLULIDAE 245 



8 and 9, the length of those on 9 fully equal the dorsal length of 

 segment 10; lateral appendages one-half the length of the supe- 

 rior median. 



Measurements ; exuviae : length of abdomen, about 1 1 mm. ; 

 greatest width, 7 mm. ; length of the mentum, 4.5 mm. Reared 

 specimen collected at East Haven, 2 May, 1926, and emerging 

 25 May, 1926. 



Adult, male. — Color dark brown to bluish black and buff. 



Head : labium buff, labrum dark brown, clypeus and front 

 brown (teneral) ; labrum black, clypeus and front dark brown in 

 older specimens ; vertex brown or black, the apex truncate and 

 concave when viewed from above ; occiput brown to black, pale 

 between the compound eyes on the meson (teneral), and with 

 indefinite pale spots on the lateral margins behind the compound 

 eyes. 



Thorax : prothorax brown, the notum, including caudal margin, 

 cream-colored (teneral), black when old; caudal margin of the 

 notum entire, and with only a few hairs ; meso- and metathorax 

 dark brown (entirely black or bluish in older specimens) and with 

 a mid-dorsal buff stripe, a wide lateral streak beginning at the base 

 of the hind wings and ending at the caudal margin of the kat- 

 episternum of the mesothorax ; metepimera all pale except the 

 dorsal border. Thoracic venter dark brown ; legs black, the coxae 

 and trochanters paler, and frequently part of the femora also ; 

 wings (PI. XV, Fig. 3) with a short basal streak between Sc and 

 R, occupying 2-3 antenodal cells ; postnodal cells, and cells beyond 

 stigma to tip of the wing flavescent ; stigma widest about the 

 middle, the proximal half or two-thirds cream-colored, the 

 remainder brown. 



Abdomen: brown and yellow (teneral), or entirely bluish black 

 (old), the younger individuals with a yellow stripe on each side; 

 venter brown ; surface of abdomen with but few hairs ; anal 

 appendages black, the superiors but little longer than the inferior ; 

 hamules of the second segment with lateral lobes reduced to a 

 ridge on the side of the median lobes, the latter bearing at their 

 tips strong black hooks ; accessory appendages as in Fig. 63, 

 No. 9. 



Female. — Similar to the male ; wings darker, especially the tips, 

 which are heavily inf uscated ; abdomen with broad yellow stripes 

 on each side from base to tip. 



Measurements : total length, male 43-47, female 41 mm. ; length 

 of abdomen, male 26-29, female 25-27 mm. ; length of hind wings, 

 male 33-35, female 33-35 mm. ; width of hind wings, male 10, 

 female 9-10 mm. ; length of pterostigma, male 5, female 4.5-5 mm, 



Connecticut. — New Haven, 17 June, 1902 (E. J. S. M.) ; New London, 

 8-22 June, 1921 (R. H. H.) ; Hamden, 4 July, 1921 (P. G.). 

 New England. — May 24-Septeniber 4. 



