No. 39] ODONATA OF CONNECTICUT: GOMPHIDAE 1 27 



Goinphus. Occiput without spines, the occipital carina not sharply 

 defined ; postg'enae brown. 



Thorax : prothorax uniform brown, paler on sides ; mesepistema 

 with a yellow stripe at middle and a narrower, sometimes inter- 

 rupted one above the mesopleural suture ; metepisterna and 

 epimera indefinitely yellow or green and brown ; les^s brown, paler 

 at base, the front femora olive beneath ; femora with short spines 

 scattered irre^larly over the ventral surfaces, but arrans^ed in 

 two rows distally on the hind femora ; tibiae carinate above and 

 below and with two ventral rows of spines ; tarsi with the third 

 seg^ment longer than the first two together, the claws with ventral 

 teeth beyond the middle ; wings clear with a short basal streak 

 of brown; antenodals about 15; postnodals 9 in the front wings; 

 stigtna surmounting 6 cells in the front wing; triangle composed 

 of 3 cells in the front and 2 in the hind wing. 



Abdomen : brown with yellow spot on sides of 2 and a streak 

 on dorsum ; terga 3 with dorsal streak, 4-7 inclusive with basal 

 spots on dorso-meson, that on 7 largest ; lateral margins of 1-5 

 and spots on the margin of 6-8 pale; vulvar lamina composed of 

 short, broad setose plates with an obtuse median notch ; superior 

 anal appendages pale yellowish, the tips darker, inferiors brown. 



Measurements : total length, male 54, female 49-53 mm. ; length 

 of abdomen, male 39-43, female 36-43 mm. ; length of hind wings, 

 male 32, female 31-33 mm., width of hind wings, male and female 

 9; length of stigma, 5 mm. 



New England. — June 5-August 9. 



Genus Hagenius Selys 



Nymphs. — Proximal segment of labial palpus rounded and 

 without hook at apex ; third segment of the antennae subcircular 

 in outline ; abdomen nearly as broad as long and with median 

 dorsal hooks on segments 2-7 ; ninth abdominal segment without 

 an acute apical spine on dorso-meson. 



The caudo-lateral margins of the head have acute, tooth-like 

 dorsal projections. 



Adults. — Subcostal cross-vein absent ; triangles with cross- 

 veins ; anal loop present consisting of 3-4 cells ; vertex without 

 an acute elevated ridge between compound eyes ; dorsum of thorax 

 brown with yellow stripes ; hind femora short, extending beyond 

 caudal margin of second abdominal segment ; inferior appendage 

 of male entire, subquadrangular caudal margin concave. 



The nymphs of the one representative of this genus have been 

 collected in small meadow brooks, though one emerging specimen 

 was found near a small pond in the northern part of the state. 

 The adults are strong fliers and not easily captured. 



