132 DRAGONFLIES OF NORTH AMERICA 
with a broad median stripe widened below to cover the spiracle, and confluent 
with the brown of the under surface. Legs blackish. Wings hyaline, sometimes 
tinged with yellow beyond the triangles and at the base; stigma brown. Ab- 
domen slender; sides of basal segments clothed with white hairs; auricles small; 
segments 3-8 cross-banded with greenish yellow, interrupted middorsally and 
confluent at sides with submarginal streaks of the same color; 9 with paler apical 
half-ring, which on 10 becomes a pair of dorsal spots. Appendages long, straight 
smooth, hairy within. 
89. Coryphaeschna virens Rambur 
Ramb. ’42, p. 192: Mtk. Cat. p. 115. 
Length 87 mm. Expanse 115 mm. Ga.? 
Face, occiput and tip of vertex green. Thorax similar to that of the preceding 
but with the dorsum greenish, marked with brown, in a line on each side of the 
carina (stripe 1) and another short, very oblique one on each side (stripe 2); 
sides greenish with brown lines on first and last sutures (stripes 3 and 5). Feet 
black with only base of femora reddish. Wings hyaline, sometimes a little tinted 
with brown; costa black; stigma brown; anal triangle of 2 cells. Abdomen 
slender a little enlarged on the second segment or narrowed on the third; blackish 
spotted with green; 3-8 with middorsal streaks and a terminal ring of green; 
10 flat above. Appendages brownish. 
20. NASIAESCHNA Selys 
These are big, angular, greyish blue and brown darners of rather 
archaic aspect, built on lines that are rather less graceful than those of 
related genera. The frons projects forward above the sloping clypeus 
in a sharp-edged snout-like shelf (whence the generic name). The 
radial sector is symmetrically forked. The radial planate subtends but 
a single row of cells. Veins M, and M;2 are not convergent behind the 
stigma. 
There is a single species distributed well over the eastern United 
States, but it seems to be rare and local. 
The nymph is at once distinguished from all the other darner nymphs 
of our fauna by the possession of a series of dorsal hooks on the ab- 
domen. It was described by the senior author (01, p. 468) and by Ndm. 
and Hart (’01, p. 34). 
00. Nasiaeschna penthacantha Rambur 
The Blue-nosed Darner 
Ramb. ’42, p. 208: Mtk. Cat. p. 116: Howe ’19, p. 50: ’23, p. 125: Garm. ’27, 
p. 194. 
Length 68 mm. Expanse 98 mm. Ill. and New England to Fla. and Tex. 
This is a blue-nosed, black-legged creature of rather elongate form and 
slender abdomen. Face yellowish with brownish margin to the labrum below and 
