June, 1918 Bulletin of the Brooklyn Entomological Society 65 
ec, Epicallus. sa, Epiproct, pygidium, or supraanal 
en, Endophallus. plate.* 
ep, Titillator, epihamulus. sc, Subcornus. 
eu, Eupenis or praeputium. sh, suprahamus. 
f, Fimbrilobus. sl, Sublamina. 
g, Glans of penis. sm, Sensomacula. 
h, Hemitergite. sp, Spermatophore. 
hy, Hypandrium or hypoproct. ss. Subsacculus. 
ju, Juxtuncus. su, Sternomacula. 
ml, Membranous lobes below phal- t, Telofilum, or terminal filament. 
lus. te, Telson. 
p, Genital papilla. tm, Tectum. 
pa, Paraproct. v, Vomer. 
ps, Postcornus. va, Virga. 
pe, Phallus or true penis. 
EXPLANATION OF FIGURES. 
In all lateral views, excepting Fig. 100, the anterior end is turned toward 
the left hand margin of the page, and the dorsal surface is uppermost. In 
all dorsal or ventral views, the anterior end is directed toward the top of 
the page. Unless otherwise stated, figures are of terminal segments of 
male insects. 
Pie avn, JUL, 
Ventral view of Odonatan Lestes rectangularis Say. 
Ventral view of Odonatan Aeschna mixta Latreille. 
Lateral view of Odonatan Calopteryx splendens Harris. 
Ventral view of Ephemerid Blasturus cupidus. 
Ventral view of Ephemerid Heptagenia sp. (subimago). 
Dorsal view of Odonatan Argia violacea Hagen. 
Lateral view of Odonatan Anomalagrion hastatum Say. 
Lateral view of Odonatan /schnura posita Hagen. 
Lateral view of Ephemerid Heptagenia interpunctata. 
Fic. 10. Lateral view of Plecopteron Lewctra sp. 
Fic. 11. Mesal view of cercus and paraproct of Odonatan Enallagma 
civile Hagen. 
Fic. 12. Dorsal view of Plecopteron Perla americana. 
Fic. 13. Caudal view of Plecopteron Acroneura lycorias. 
Fic. 14. Lateral view of Plecopteron Perlesta placida. 
Fic. 15. Lateral view of Ephemerid Ephemera varians. © 
Fic. 16. Caudal view of Plecopteron Nemoura completa. 
Fic. 17. Dorsal view of Plecopteron Acroneuria brevipennis. 
Fic. 
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*In Fig. 22, the label “sa” refers to the plate bearing the structure 
labeled “pc.” In Figs. 63, and 92, the tergite labeled “sa” may not be the 
eleventh tergite, but is homodynamous with it. The subanal and supra- 
anal plates of other insects are not the subanal and supraanal lamine of 
Odonata. 
