22G NEW YORK STATE MUSEUM 



tliat, if I lield the net motionless in front of a flying male lie 

 would promptly alight on the edge of it. 



But specimens may be captured directly with little trouble at 

 morning or evening, or on cloudy days, when they are less active. 

 Sometimes they assemble in large numbers on the pendant 

 boughs of a willow bush beside a stream at evening, forming 

 with their crimson strealced wings and bodies of black and 

 bronze against the willow background, so charming a picture 

 that the collector will hesitate to disturb it. 



The nymphs cling to plants in the rapids; occasionally they live 

 on bulrush stems that fringe the wave-washed shore of a lake. 

 Transformation takes place just above the edge of the water, 

 and, with us, in the month of August. Our common species I 

 have bred several times in widely separated localities. It does 

 not occur at Saranac Inn. It has been several times taken at the 

 head of Cayuga lake at Ithaca. This species (H. a m e r i c a n a) 

 may be separated from H. t r i <• o 1 o r as follows: 



KEY TO SPECIES 



a Tibiae with the exterior side yellow a m e r i c a u a 



na Tibiae entirely black tricolor 



Hetaerina americana Fabricius 



Plate 12 

 179S Agrion americana Fabricius, Ent. Syst. Suppl. p.2S7 

 1S39 L e s t e s b a s a 1 i s Say, Acad. Nat. Sci. Phila. Jour. 8:35 

 18.39 Galopteryx americana Burmeister, Haudb. Ent. 2:826 

 18.54 Hetaerina americana Selys, MonogT. Calopteryginae, p. 131, 



pl.l2, fig.3. 

 18G1 H e t- a e r i n a americana Hageu, Synopsis Neur. N. Am. p.GO 

 1SG3 Hetaerina americana Walsh, Ent. Soc. Phila. Proc. 2:211, 



267 

 1875 Hetaerina americana Hageu, Bost. Soc. Nat. Hist. Proc. 



18:23 

 1893 Hetaerina a m e r i c a n a Calvert, Am. Ent. Soc. Trans. 20:228 

 1895-97 Hetaerina a m e r i c a u a Calvert, N. Y. Ent. Soc. Jour. 



3:42 and 5:92 (listed from Keeseville, Ithaca and Albany county) 

 1895 Hetaerina americana Kollicott, Cincinnati Soc. Nat. Hist. 



Jour, (habits) 



1899 Hetaerina a m e r i c a n a Kellicott. Odou. Ohio, p.4 



1900 Hetaerina a m e r i c a n a Williamson, Dragon Flies Ind. p.254 



1901 H e t a r i n a a m e r i c a u a Howard, Insect Book, pl.46, fig.ll 

 1901 Hetaerina americana Calvert, Biol. Contr. Am. vol. Neur. 



p.26-29, pl.2, fig.1-17 (a most complete account of imago) 



