238 NEW YORK STATE MIPSEIUM 



In habits our species are somewhat diverse. In general, 

 may be said that they frequent the borders of the larger bodi 

 and streams of water, and both in the water and out of it aft 

 transformation they cling to the surfaces of stones, piers, ti 

 bers, bare banks, etc., rather than to vegetation. Imagos m 

 be found squatting on a bare bank much more frequently thi 

 clinging to its neighboring plants, but they will travel out amoi 

 the plants when foraging, following then by preference a ba 

 ■path or roadway. 



The eggs are deposited mostly on the alga-covered surfaces 

 which the nymphs will afterward cling. In ovipositing the ma 

 usually retains his hold on the prothorax of the female, ai 



Fig. 8 Fore wing ofArgia fumipennis, -with quadrangle (g) of hind win 



when, as happens frequently with the first species of our li 

 at least, she descends beneath the surface of the water to plai 

 her eggs at a lower level, he is carried along. 



The nymphs of Argia are usually recognizable at a glance, \ 

 reason of their thick set bodies and short, broad and dark cc 

 ored gills. If these be not sufflcient, the entire absence of ra 

 torial setae from the mentum of the labium will certainly di 

 tinguish them from all our other genera of Agrioninae. Tl 

 nymphs are so much alike that a generic description of the 

 may be given here, saving much repetition. 



Nymph. Short and thick and usually dark colored, with sho: 

 legs and short-oblong gill plates [pl.l5, a] . The head is som 

 what wider than long, flat above, with very prominent eye 

 behind which the sides are parallel as far as the obtuse 

 rounded hind angles, between which is a deep round posterii 

 «margination. The antennae are six to seven jointed wii 

 the third joint longest. The labium [pl.l4, e and f] is'shoi 

 with hinge barely reaching posteriorly to the base of tl 



