AQUATIC INSECTS IX NEW YORK STATE 489 



PLATE 18 



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 6Anomalagrion hastatum Say, male and female 

 7 Nymph of A. saucium 

 S Wing of Lestes rectangular is Say 



PLATE 19 



Enallagma 



Male abdominal appendages of New York species 



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

 piscinarium. e E. divagans; f E. exsulans. g E. 

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

 sum. 7;E. traviatum. 7E. antenna turn. mE. signa- 

 tum. mE. 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 



hh Breathing holes 



c Cuticle 



ccp Cavity suTrounding the cuticular pocket 



cp Cuticular pocket 



cs Caudal spine 



CSS Holes made by the caudal spines j 



d Dorsum ] 



da Dorsal apodeme i 



dc Dorsal cavity j 



ds Distal setae of the labrum j 



e Holes eaten in the stems by larvae 



ec Empty cavities 



ex Location supposed opening in the paired dorsal cavities 



7i Hypodermis 



hep Hypodermis of the cuticular pocket 



IS Infraspiracular setae \ 



I Lamellae I 



Ig Leg 



hi Lumen ' 



Ir Lumen respiratory system 



Is Lateral setae 



in Muscle I 



md Median setae of the labrum 



mg Marginal setae of the labium \ 



ms Meso thorax | 



mt Metathorax ' 



■o Cocoons 



