224 NEW YORK STATE MUSEUM 



scription I will give the measnremeuts of one of the largest 

 nymphs, (length 23mm, antennae 5nim and gills 13.5mm addi- 

 tional) and add that the nymph seems entirely like that of 

 C. maculata except in its more uniform coloration and in 

 the diagnostic character already stated in the key. 



Calopteryx maculata Beauvois 



The Mackwing 

 Plate 11 



1805 A gr ion maculata Beauvois, 7.ns. Afr. Am. p. 85, Neur. pi. 7, 

 flg.3 



1861 Calopteryx maculata Hagen, Synopsis Neur. N. Am. p.57 



1875 Calopteryx maculata Hagen, Bost. Soe. Nat. Hist. Proc. 

 18:22 



188!) Calopteryx ma c n 1 a t a Hagen, Psyche. 5:246 (full descrip- 

 tion) 



1893 Calopteryx m a c u 1 a t a Calvert. Am. Ent. Snc. Trans. 20:227 

 (description) 



1895-97 Calopteryx maculata Calvert, N. Y. Ent. Soc. Jour. 3:4-1 

 and 5:92 (listed, from many localities in the State) 



1899 Calopteryx maculata Kellicott. Odon. Ohio, p.8 (descrip- 



tion) 



1900 Calopteryx ma c u 1 a t a Williamson, Dragon Flies lud. p. 251 



(description) 



This is our common species. In early summer it may be ob- 

 served poising on some green twig beside any clear stream, or 

 lending animation to the scene by the show of its brilliant 

 colors in flight. At this season the cast skins may be looked 

 for along any bank near which the imagos are flying, sticking 

 fast to some support in a sprawling attitude close to the sur- 

 face of the water. 



Nymph [flg.3]. Length 20mm, antennae 4mm and gills Llmm 

 additional, Somm in all. 



Elongate, slender, smooth; greenish brown, with a broad band 

 of paler color nearly covering the flat upper surface of the head, 

 and tapering backward on the thorax; paler rings on the middle 

 of femora and gills; obsolete band of darker brown on the sides 

 of the body, best defined on the sides of the thorax and rear of 

 the head; a middorsal line of brown on the abdomen, inter- 

 rupted at the sutures; gills usually paler at extreme tip. 



Labium [pi. 14, fig.o] elongate, reaching posteriorly between 

 the bases of the middle legs; no raptorial setae, but a spinule 

 each side of the deep median cleft within, and three others at 



