No. 39] ODONATA OF CONNECTICUT: CORDULEGASTERIDAE 121 



depression; hamules hook-like, slender, "genital lobe projecting' 

 but slightly and with short spines and delicate marginal setae. 



Female. — Similar to the male in general color; tibiae without 

 the small tubercles of the male; compound eyes separated by 

 .6 mm. ; wings without anal triangle, somewhat flavescent, dorsal 

 lateral spots on abdominal terg^a 2, 3 and 4 continuous and form- 

 ing a yellow stripe on each side ; anal appendages short, the supe- 

 rior slender, barely exceeding the inferior in length; ovipositor 

 yellowish brown at base, darker, measuring about 5 mm. and 

 extending beyond the anal appendages considerably. 



Measurements : total length, male 56, female 65 mm. ; length 

 of abdomen, male 42, female 48 mm. ; length of hind win^s, male 

 '},'/, female 42 mm. ; width of hind wings, male 8-10, female 12 mm. 



Connecticut. — Rainbow, 5 June, 1912 (H. B. K.) ; Killingworth, 27 

 June, 1920 (W. E. B.) ; New London, 8 June, 1921 (R. H. H.) ; Litchfield, 

 4 July, 1913, 4 June, 1925 (L. B. W.). 



New England.— May 28-August. 



Cordulegaster erroneus Hagen 



Bulletin de I'Academie royale . . . de Belgique (2), 46: 688: 1878. 



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



Head : labium light brown ; labrum yellow with black ventral 

 border ; anteclypeus black, postclypeus yellow ; front brown to 

 black ; vertex brown ; occiput and postgenae yellow except the 

 dorsal region below the caudal margin of the compound eyes, 

 which is black; compound eyes meeting in a single point on the 

 dorso-meson. 



Thorax : dark brown with yellow stripes, venter lighter ; pro- 

 thorax, brown ; dorsal cuneiform stripes of the mesepistema 

 entire, i mm. wide by 4 mm. long and rounded at the upper end ; 

 first lateral or mesepimeral stripe 1.5 by 6 mm., the second lateral 

 1.5 by 5 mm.; legs black with the usual spines and setae; wings 

 with 3 cells in the anal triangle; antenodal cross-veins 19-20 in 

 front and 14 in hind wing. 



Abdomen (Fig. 13, No. 4) : dark brown; second tergum with 

 an obscure yellow ring and yellow caudo-ventral angles ; there is 

 also a small yellow spot on the caudal margin on either side about 

 I mm. from the dorso-meson ; tergum 3 with a transverse mesal 

 stripe which sends an offshoot to the cephalo-ventral angles ; terga 

 4-8 with transverse stripes 1.5 mm. wide which appear as com- 

 plete (often interrupted on meson) yellow rings on these seg- 

 ments ; gth tergum with a touch of yellow along the cephalic 

 margin on each side ; loth entirely black ; superior anal appen- 

 dages 1.5 mm. long, black, the tips pointed; ventro-mesal margin 

 with a tooth at proximal 3d, and a basal lateral tooth beneath the 

 overhanging margin of segment 10; accessory appendages with 

 the anterior lamina wrinkled, bluntly pointed, the lateral depres- 

 sion, however, not definitely limited; hamules slender, hook-like, 



