58 



ENTOMOLOGICAL NEWS 



[Feb., '15 



'99) emerged June 20. Images appeared in the field a few 

 days later and were common until July 30, although by July 4 

 the season of transformation was practically over. As is the 

 custom of other Enallagmas, the male usually accompanied the 

 female during oviposition. I saw only one female descend 

 beneath the surface of the water. She was deserted by the 

 male, who hovered over the water in an agitated manner for 

 ten minutes. He flew to the shore, but returned again to re- 

 main twenty minutes longer above the spot where she had 

 disappeared. On July 16 a pair was copulating on the Alumni 

 Field about an eighth of a mile from Cascadilla Creek, the 

 nearest body of water from which they could have emerged. 



Description of Nymph* (Plate T, fig. 3, text figs. 1-4). — 

 The nymph of Enallagma ebrium Hagen appears more active 

 than that of other species of Enallagma. Even at transforma- 

 tion time the color is such a clear green that the nymph looks 

 as though it had recently molted, but a very slight pigmenta- 

 tion sometimes darkens the shade. 



Fig. I. — Labium showing the usual number of mental setae. 

 " 2.— Lateral lobe of labium shown in Fig. i. 

 " 3 and 4.— Labium and lateral lobe showing the extra number of setae. 



[♦The nymph of E. ebrium has been described from a single speci- 

 men by Dr. E. M. Walker (Can. Ent. xlvi, p. 351, Oct., 1914) some 

 months after the receipt of Miss Lyon's MS. by the News. Since Miss 

 Lyon had a greater number of individuals at hand in drawing up her 

 description and has accompanied it with figures, we publish her account 

 as received. Plate I was published in the January number of the 

 News. — Ed.] 



