222 NEW YORK STATE MUSEUM • 



KEY TO SPECIES 



Imagos 



a Wings narrow; hind margin straight for a dis- 

 tance, and parallel to front mai'gin 

 & Wings uniformly colored or transparent 



c Wings clear angustipennis 



cc Wings yellowish amata 



bb Apical sixth of wings black apicalis 



aa Wings dilated, with hind margin visibly rounded 



b Apical third of the hind wings blackish aequabilis 



bb Wings uniformly blackish or smoky mac u lata 



Nymphs 



a Basal segment of the .antenna orue third longer 



than the head is wide aequabilis 



Off Basal segment of the antenna hardly longer than 



the head is wide maculata 



aaa Unknown angustipennis, amata, apicalis 



Calopteryx angustipennis Self's 



1853 Sylph is angustipennis Selys, Acad. Belg. Bui. 20:9 



1854 Sylphis elegans Hagen, Monogr. Calopterygines, p.23, $ . 

 1861 Calopteryx angustipennis Hagen, Synopsis Neur, N. Am. 



p.56 



1875 Calopteryx angustipennis Hagen, Bost. Soc. Nat. Hist. 

 Proc. 18:20 (full bibliography and notes) 



1889 Calopteryx angustipennis Hagen, Psyche, 5 :242 (descrip- 

 tion) 



1900 Calopteryx angustipennis Williamson, Dragon Flies Ind. 

 p.253 (description and account .of habits) 



This elegant, clear winged si)ecies has not been found as yet 

 within the State, but Mr Williamson has found it locally abun- 

 dant in western Pennsylvania. Its nymph is unknown. 



Calopteryx amata Hagen 



1889 C al op te r y X amata Hagen, Psyche, 5:242 (original descrip- 

 tion) 



1895 Calopteryx amata Calvert, N. Y. Ent. Soc. Jour. 3:42 (listed 

 from Keene Valley: descriptive notes) 



To the above record of a single capture of this species at 

 Keene Valley, I have only to add the record of another capture 

 on the other side of the Adirondacks, at Axton in June 1901, by 

 Mr A. D. INIacGillhray. The nymph is unknown. 



