224 NEW YORK STATE MUSEUM > 
scription I will give the measurements of one of the largest 
nymphs, (length 23mm, antennae 5mm 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 blackwing 
Plate 11 
1805 Agrion maculata Beauvois, Ins. Afr. Am. p.85, Neur. pl.7, 
fig.3 
1861 Calopteryx maculata Hagen, Synopsis Neur. N. Am. p.57 
1875 Calopteryx maculata Hagen, Bost. Soc. Nat. Hist Prec 
16322 
1889 Calopteryx maculata Hagen, Psyche, 5:246 (full deserip- 
tion) 
1893 Calopteryx maculata Calvert, Am. Ent. Soc. Transiayaer 
(description) 
1895-97 Calopteryx maculata Calvert, N. Y. Ent. Soc. Jour. 3:41 
and 5:92 (listed from many localities in the State) 
1899 Calopteryx maculata Kellicott, Odon. Ohio, p.8 (descrip- 
tion) 
1900 Calopteryx maculata Williamson, Dragon Flies Ind. 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 [fig.3]. Length 20mm, antennae 4mm and gills Llim 
additional, 35mm 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 [pl.14, fig.a] 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 
