No. 39] ODONATA OF CONNECTICUT: COIIDULEGASTERIDAE 1 23 



venter of thorax and intersternum lighter brown than the sides; 

 legs black, the femora, trochanters and coxae sometimes lighter, 

 femora with two rows of irregular setae ; tarsi with distal seg- 

 ment as long as the median and proximal together, claws about as 

 long as the median; wings (PI. viii, Fig. 2) slightly flavescent; 

 anal triangle composed of three to four cells ; 2-3 cubito-anal 

 cross-veins and a cross-vein in each triangle; supertriangle and 

 basilar space usually free; antenodal cross-veins 17-21 in front 

 wing and 12-15 "^ the hind; post-nodals 12-14 in each wing; 

 stigma supported by 3-4 cross-veins. 



Abdomen (Fig. 13, No. 2) : brown or black, the following 

 yellow: auricles of segment 2; four dorso-lateral spots (two 

 median and two apical) on terga 2, 3 and 4, the median spots 

 separated from each other by much less than i mm. ; terga 5-8 

 with median spots only, though these are small dots at the apex 

 of 5 ; cephalic margin of tergum 9 with a small transverse dash 

 on each side; segment 10 entirely black; terga contiguous on 

 the ventro-meson in segments 4-8. Superior anal appendages 

 black, 1.5 mm. long, and with a large ventro-mesal tooth at middle, 

 and another ventro-lateral tooth at base; inferior anal appendage 

 about as wide at apex as at base ; accessory appendages composed 

 of blunt, deeply impressed cephalic lamina, and narrow hook-like 

 hamules 1.5 mm. long. 



Female. — Ovipositor about twice as long as abdominal segments 

 9 and 10 together. Thorax with small yellow spot behind the 

 metathoracic spiracle. 



Measurements : total length, male 65-70, female 75 mm. ; length 

 of abdomen, male 50-53, female 54 mm. ; length of hind wings, 

 male 40, female 39-45 mm. ; width of hind wings, male 9-10, 

 female 11-12.5 mm. 



Connecticut. — Rainbow, s June, 1912 (H. B. K.) ; New London, 9 

 June, 1 921 (R. H. H.) ; Orange, 29 May, 1922 (M. P. Z.) ; Storrs, 5 

 October, 1923, J. Cronin; Litchfield, 3, 6, and 20 June, 1925 (L. B. W.). 

 New England. — May 29-October 5. 



Cordulegaster obliquus Say 



Journal of the Academy of Natural Sciences of Philadelphia, 8: 15: 1839. 



Adult, male. — Color dark brown marked with yellow. 



Head : labium light brown ; labrum yellow with a black ventral 

 border ; anteclypeus black, postclypeus yellow, front yellow with 

 black ventral border which is continuous with a broad, brown, 

 preocellar stripe ; vertex, occiput and postgenae, except the dorsal 

 border behind the compound eyes, yellow. 



Thorax : dark brown ; venter somewhat lighter ; prothorax dark, 

 mesepisternal or dorsal yellow stripes cuneiform, 3.5 mm. long by 

 1.5 mm. wide at upper end; first lateral or mesepimeral stripe 

 5-6 mm. long by 1-1.7 wide, the ends rounded, metepimeral 



