THE FEMALES OF ENALLAGMA LATERALE MORSE 
AND RECURVATUM DAVIS 
(ODONATA: COENAGRIONIDAE) 
By Robert H. Gibbs, Jr. 
Department of Conservation 
Cornell University, Ithaca, New York 
Of the 23 northeastern members of the genus Enallagma, 
the females of piscinarium, laterale, and recurvatum have 
not been described. E. piscinarium is apparently known 
only from the type male. Although males of laterale have 
been taken in several localities, the female remains un- 
recorded. The female of recurvatum may have been col- 
lected, but references to it are quite misleading. In the 
original description of the species by Davis (1913) the 
female is supposedly described, but the description is quite 
inadequate and not diagnostic. Byers, in his key (1927), 
does not distinguish it from E. hageni other than by its 
comparative rarity. Garman (1927) stated that “all sup- 
posed females thus far examined have proved to belong 
to other species.” 
Systematic collecting on Cape Cod, Massachusetts, has 
resulted in the finding of tandem pairs of both laterale and 
recurvatum. In addition, Thomas W. Donnelly has al- 
lowed me to examine some collections sent to him by Mr. 
Roy Latham from Riverhead, Long Island, New York, 
which contained two females of recurvatum and one of 
laterale. The following descriptions are based on these 
Cape Cod and Long Island specimens. 
For suggestions during the preparation of this manu- 
script, I wish to express appreciation to E. M. Walker, 
L. K. Gloyd, M. J. Westfall, Jr., T. W. Donnelly, H. E. 
Evans, and J. G. Franclemont. 
Enallagma laterale Morse. Female 
Psyche 7: 274. 1895 
Color: Olivaceous, washed with light blue, and black. 
Head : Dorsum black ; pale frontal margin reaching bases 
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