No. 39] ODONATA OF CONNECTICUT: LIBELLULIDAE 207 



7. Abdomen large, segments 3 and 4 of male flattened beneath ; 4 



to 5 antenodals in the hind wings (PI. xii, Fig. i ) . . . Tetragoneuria 

 Abdomen small, slender, rounded; 5 to 6 antenodals in the hind 

 wings (PI. XII, Fig. 4) Helocordulia 



Genus Epiccrdulia Selys 



Nymphs. — Caudo-lateral margins of the head angular, palpal 

 (or lateral) setae 4 or 5, dorsal hooks on abdominal segments 2 

 to 9 ; lateral spines of segment 9 surpassing the tips of the 

 terminal appendages. 



Adults. — Sectors of arculus separated at point of union ; tri- 

 angle with cross-veins ; subtriangle absent, there being only one 

 cubito-anal cross-vein ; area between Cu^ and M^ not widened at 

 margin of front wing ; dark spots at base, nodus and apex of wing ; 

 abdomen of female with a forked process on venter of segment 8 ; 

 considerable contraction behind segment 2, but the abdomen 

 depressed, not compressed ; color not metallic. 



The nymphs are reported to inhabit the bottoms of ponds, crawl- 

 ing over dead wood or stones. The adult is a particularly strong 

 flier and the eggs are laid while in flight by dipping the tip of 

 the abdomen in the water. 



Epiccrdulia princeps Selys 



Synopsis of the Neuroptera of North America, 134: 1861. 



Nymph (PI. iv, Fig. 8).— 



Head : caudo-lateral margins rounded, with a small tubercle on 

 each side behind the mesal angles of the compound eyes; labium 

 with 5 lateral setae on the palpi (an additional smaller one at base 

 of movable spine), and 4 mental setae each side, the interior 

 surface heavily setose near the distal margin. 



Thorax : sides dark with a lighter stripe above the coxae ; hind 

 femora extending to segment 7, wing-cases to middle of 

 segment 5. 



Abdomen: broad, flat beneath, with two longitudinal grooves 

 dividing the surface into thirds ; prominent dorsal hooks on seg- 

 ments 2-9 inclusive, and lateral spines on segments 8 and 9, those 

 on 9 exceeding the terminals in length. 



Measurements ; exuviae : total length, 27 mm. ; length of abdo- 

 men, 14-15 mm.; greatest width of abdomen, 11-12 mm.; length 

 of hind femora, 7-8 mm. 



Adult, male. — Color black and dark brown or olive. 



Head: brown, labium buff. 



Thorax: brown, somewhat darker on the shoulder of the mes- 

 epimera; wings (PI. xiv, Fig. 2), large dark brown spots on 

 base, nodus and apex ; triangle of the hind wing with a cross- 

 vein ; anal loop, foot-like ; legs with brown coxae, trochanters, 

 and femora ; tibiae and tarsi black. 



Abdomen: segments 2 and 3 swollen and lighter in color than 



