AGRION 261 
metallic bluish green with narrow black lines on all sutures and lines of paler 
about the wings roots and behind the leg bases. Legs black. Wings with the 
brown areas of the tip covering one fourth of the length of the fore wing and one 
third of that of the hind wing; inner margin of the brown diffuse. Costa black; 
stigma of female white. Abdomen metallic bluish green with black appendages. 
“While often found in company with maculata, aequabilis prefers the 
larger streams, and is considerably warier and swifter of flight than its 
congener.”’ (Walk. ’08, p. 3.) 
This species “‘oviposits by inserting the eggs under the water in willow 
roots. She is unaccompanied by the male but remains indifferent as 
various males hover over her.”’ (Kndy. 715, p. 338.) 
249. Agrion dimidiatum Burmeister 
Burm. ’39, p. 829: Mtk. Cat. p. 28. 
Syn: cognata Ramb., syriaca Ramb. 
Length 46 mm. Expanse 54 mm. Mass., Del. to Ky., Fla. and Mich. 
A dainty little metallic greenish blue species with black wing tips. Face 
metallic with gray hair fringes and black antennae. Thorax metallic with all 
the sutures black. Venter black. Legs black. Wings with blue costa; apical 
fourth brownish black with straight, well defined inner margin; stigma of female 
white. 
250. Agrion apicale Burmeister 
Burm. ’39: p. 827: Mtk. Cat. p. 29: Garm. ’27, p. 111. 
Length 46 mm. Expanse 54 mm. Mass., Pa. to Mich. 
Similar to the preceding species, appearing to differ only in that the brown 
spot at the tip of the wings covers only about a sixth of their length. 
251. Agrion maculatum Beauvais 
Beauv. ’05, p. 85: Mtk. Cat. p. 29: Walk. ’07, p. 1: Davis’13, p.13: Whed. ’14, 
p. 90: Garm. 717, p. 469: Holl. ’22, p. 117: Garm. ’27, p. 112. 
Syn: virginica Westwood, materna Say, opaca Say, holosericea Burm., 
paptlonacea Burm., virgo Drury. 
Length 42 mm. Expanse 64 mm. Ont. and Me. to Fla. and Tex. 
This is the common widespread species that has the wings wholly suffused 
with blackish, lustrous, shining black in the adult male, and the body wholly 
metallic green, including face and top of head. The thoracic sutures are black. 
The wings show variable small basal areas that are subhyaline. The costal edge 
is metallic; the stigma of the female is white and the general coloration paler. 
Whedon (’14, p. 90) says: “This very conspicuous damselfly is to be 
found along streams, generally the smaller ones, weakly fluttering over 
the ripples at the water’s edge or perching on the vegetation within a 
foot or two of the surface. Not infrequently numbers of them rest among 
