AQUATIC INSECTS IN NEW YORK STATE 489 



PLATE IS 



Zygoptera 

 Photos from alcoholic specimens by Lee C. Stiles 

 1 and 2 Amphiagrion saucium Burm. male and female 

 3 and 4Nehallennia Irene Hagen, male and female 

 5 and GAnomalagrion hastatum Say, male and female 



7 Nymph of A. s a u cl u m 



8 Wing of Lestes rectangular is Say 



PLATE 19 



Enallagma 



Male abdominal appendages of New York species 



a B. annexum. 6 E. hageni. c E. geminatum. d E. 

 piscinarium. eE. divagans. f E. exsulans. g E. 

 e b r i u m . 7i. E. c a r u n c n 1 a t u m- . i E. civile. / E. a s p e r - 

 sum. /cE. traviatum. ZE. antenna turn. mE. signa- 

 tum. «E. pollutnm. 



List of abbreviations for plates 20-31 



■ft Cocoons from which adults have emerged 



al Alimentary canal 



<is Anterior sclerite 



-ast Anterior sternal setae 



at Anterior tergal setae 



•6ft Breathing holes 



c Cuticle 



ccp Cavity surrounding the cuticular pocket 



■cp Cuticular pocket 



cs Caudal spine 



■CSS Holes made by the caudal spines 



4 Dorsum 



da Dorsal apodeme 



•eJc 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 Hypodermis of the cuticular pocket 



is Infraspiracular setae 



I Lamellae 



Ig Leg 



In Lumen 



Ir Lumen respiratory system 



Is Lateral setae 



m Muscle 



md Median setae of the labrum 



mg Marginal setae of the labrum 



tes Mesothorax 



mt Metathorax 



J^ P,npr»nna 



