154 CONNECTICUT GEOL. AND NAT. HIST. SURVEY [BuU. 



Adult, male. — Color brownish black marked with dull greenish 

 yellow. 



Head : yellowish except the area bounded by the transverse 

 epicranial suture, compound eyes, and a transverse line drawn 

 immediately in front of the antennal bases, this area being dark 

 brown ; dorsal margin of the postgenae behind the com.pound 

 eyes, black. 



Thorax: brown with greenish olive stripes as in Fig. 22, No. 

 17 ; meso- and metanota pale ; coxae, trochanters, dorsum of tibiae 

 and sometimes the first two segments of hind tarsi, pale. 



Abdomen : dark brown, with a linear pale streak on dorso-meson 

 on terga i-io approximately i mm. wide on segments i and 2, 

 almost obsolete on 7-9; lateral margins of terga i, 2, 7, 8, 9 and 

 cephalic half of 3, yellow ; small spots also on cephalo-lateral 

 angles of terga 4-7. Anal appendages with the superiors in dorsal 

 view tapering to a point ; in lateral profile the appendage suddenly 

 widened at basal third, tapering from there to tip ; length 1.3 mm. ; 

 inferior appendage with divaricate arms arising from a wide plate, 

 the tips of the arms upturned ; accessory appendages in lateral 

 profile consisting of a narrow (.25 mm. wide) black, cephalic 

 lamina with an apical tooth directed caudad on each ; a flat (.5 mm. 

 wide) hamule, the proximal two-thirds equal in width, thence 

 narrowed to the caudal margin forming a strong black hook. 



Female.— Similar to the male in color. 



Head : the caudo-dorsal margins of the occiput between the 

 compound eyes nearly straight ; postocellar ridge somewhat 

 thickened at the lateral ends and a little curved ; a lower semi- 

 circular ridge extending around the lateral ocellus, with a pointed 

 tubercle in the middle opposite the ocellus ; dorso-mesal angles 

 of the compound eyes separated by 1.5 mm.; vulvar lamina (Fig. 

 20, No. 7) composed of two flat contiguous plates with rounded 

 tips; length of segments 7, 8, 9 and 10 measured on dorso-meson 

 3, 2.2, 2.2, and I mm. respectively. 



Measurements: total length, male 41-43, female 39-43 mm.; 

 length of abdomen, male 28-32, female 28-31 mm. ; length of hind 

 wings, male 23-25, female 23-25 mm. ; width of hind wings, male 

 7.5, female 8.5-9 mm. 



Connecticut.— New Haven, 27 May, 1903, 23 May, 1906 (B. H. W.) 

 West Thompson, 12 July, 190.=; (H. L. V.) ; Westville, 2 June, 1908 

 Mount Carmel, 6 June, 1908 (B. H. W.) ; Colebrook, 19 June, 1920 

 Hamden, 30 May, 1922 (P. G.) ; Litchfield, 30 May, 1909 (L. B. W.). 



New England. — May 19-August 8. 



Gomphus lividus Selys 

 Bulletin de rAcademie royale . . . de Belgique, 21 : 53 : 1854. 

 Nymph. — Labium as shown in PI. v, Fig. 16. 

 Similar in general form to Dromogomphiis spinosus as shown 

 in PI. Ill, Fig. 6. 



