AQUATIC INSECTS IN NEW YORK STATE 489 
PLATE 18 
Zygoptera 
Photos from alcoholic specimens by Lee C. Stiles 
Tland2 Amphiagrion saucium Burm. male and female 
38and4Nehallennia irene Hagen, male and female 
5 and6Anomalagrion hastatum Say, male and female 
7 Nymph of A. saucium 
8 Wing of Lestes rectangularis Say 
PLATE 19 
Enallagma 
Male abdominal appendages of New York species 
Mieeawnex wm. DP Ww. hageni..¢c MH. geminatum. d-bB. 
Patcritigim. -e¢°: H- divagans. —f E. exsulans. g EH. 
Coit. 2h. ecarunculatum. «FE. civile. j EK asper- 
Vetere he toaviattum. ¢ BE. antennatum. mE. signa- 
Mon. won. pollutum. 
List of abbreviations for plates 20-31 
a Cocoons from which adults have emerged 
al Alimentary canal 
as Anterior sclerite 
ast Anterior sternal setae 
at Anterior tergal setae 
bh Breathing holes 
C Cuticle 
cep Cavity surrounding the cuticular pocket 
cp Cuticular pocket 
‘C$ Caudal spine 
css Holes made by the caudal spines 
d Dorsum 
da Dorsal apodeme 
de Dorsal cavity 
ds Distal setae of the labrum 
e Holes eaten in the stems by larvae 
ec Empty cavities 
ex Location supposed opening in the paired dorsal cavities 
h Hypodermis 
hep Wypodermis of the cuticular pocket 
4s Infraspiracular setae 
l Lamellae 
lg Leg 
In TLumen ] 
lr Lumen respiratory system 
ls Lateral setae 
m Muscle 
md Median setae of the labrum 
mg Marginal setae of the labrum 
ms Mesothorax 
mt Metathorax 
0 Cocoons 
