488 NEW YORK STATE MUSEUM 



PLATE 11 



Calopteryx maculata Beauy. Male and female. Photo from 

 life by J. G. Needliam 



PLATE 13 



Hetaerina americana, executed fi'om nature, under the author's 

 direction, by L. H. Joutel 

 1 and 2 Males 



3 Female 



4 and 5 Cast nymph skins 



6 and 7 Nymphs in the rapids 



PLATE 13 



Cliroinagrion conditum and Argia violacea 

 1 and 2 Resting and flying attitudes of C. conditum. 3 Nymph of 



same 

 4 Argia violacea male. 5 Nymph of same 



PLATE 14 



Labia of Zygopterous nymphs 

 a Labium of Calopteryx maculata. h Labium of Hetae- 

 rina americana. c Labium of Lestes rectangularis, 

 right lateral lobe omitted, d Left lateral lobe of same, more enlarged. 

 e Labium of Argia sp.?, right lateral lobe omitted, portion of spinulose 

 edge of median lobe shown highly magnified above, f Right lateral lobe 

 of same more enlarged, g Right lateral lobe of labium of C h r o - 

 magrion conditum. h Right lateral lobe of labium of A m p h i - 

 agrionsaucium. i Left lateral lobe of labium of N e h a 1 1 e n n i a 

 Irene. ; Right lateral lobe of labium of Anomalagrion has- 

 t at u m . I 



PLATE 15 



Median caudal gills of Zygopterous nymphs 

 aArgia tibialis. &Chromagrion conditum. cAm- 

 phiagrion saucium. dNehallennia irene. eAnoma- 

 lagrion hastatum. 



PLATE 10 



Zygoptera 

 1 Lestes uncata Kirby. Photo from life by J. G. i\eeuhaiii 

 2Enallagma exsulans Hagen. Photo from life by J. G. Need- 

 ham 



3 Drawing of nymph of Enallagma caruneulatum Morse 



4 Immature nymph of Enallagma antennatum Say. Photo 

 from alcoholic specimen by J. G. Needham 



SIschnura verticalis Say. Photo from alcoholic specimen 



PLATE 17 



Agrioninae 

 Drawings by Mrs J. G. Needham 



1 Argia apicalis Say 



2 Enallagma signatum Hagen 



3 Enallagma caruncullatum Morse 



4 (male) and 5 (female) Ischnura verticalis Say 



