ENALLAGMA 311 
Thorax bronzy blue with two antehumeral stripes of blue interrupted at three 
quarters their height. Sides of thorax blue with traces of a black line on the 
upper part of the middle suture and a continuous broader irregular line on the 
third lateral suture. Legs blackish beyond the middle of the femora; tibiae 
greenish externally. Abdomen bronze black above on middle segments, most 
extensively black on 6 with two transverse crescents (o) or a club shaped spot 
(9) on 2; 8 and 9 blue with submedian dots (<”) or basal quadrangular spots 
(¢) of black. 10 black in male and blue in female. 
This species inhabits reedy borders of trout streams 
304. Coenagrion angulatum Walker 
Walk. ’12, p. 256: Whed. ’14, p. 93: Whts. 717, p. 98. 
Length 30 mm. Expanse 36 mm. Man., Sask. 
This is an azure blue species marked with black. Face pale green cross-lined 
with black on the postclypeus and base of labrum. Head black above with large 
pyriform postocular spots and no connecting line on the occiput. Front of thorax 
bronze black with blue antehumeral bands that are parallel sided and slightly 
convergent toward their isolated ends. Sides bluish. Legs pale yellow, femora 
and tibiae lined with black. Abdomen bluish above, yellowish beneath, marked 
with bronze black as follows: an isolated transverse crescent on the second 
segment; a broad band covering most of 3-7; and the dorsum of 10; and in the 
female all of 9 and basal three-fourths of 8, as well. Appendages blackish. 
The nymph is at present unknown but its true habitat appears to be 
“‘a stagnant slough rather than a considerable body of clear water’’ 
(Whitehouse 717, p. 98). 
305. Coenagrion resolutum Hagen 
Hag. ’76, p. 1263: Mtk. Cat. p. 66: Walk. ’12, p. 255. 
Length 30 mm. Expanse 37 mm. Gr. Slave L., Hudson Bay, Wis. 
Another bronzy black and blue species. Face pale greenish yellow except 
postclypeus which is bronze black. Postocular spots blue; a greenish line between 
them along the occiput. Front of thorax bronze black with two pale greenish 
antehumeral lines that are isolated at both ends and a little constricted towards 
the upper end. Sides bluish or yellowish green. Abdomen pale blue above, 
greenish below, marked with bronze black as follows: a club shaped spot at apex 
and a pair of longitudinal lines before it on 2; broad apical spots on 3-5, more 
extensive on 6-7; all of 10 but the hind margins. Appendages blackish. 8 and 9 
are blue in the female and the black spot on 10 is smaller and basal in the female. 
This is a widely distributed species. 
72. ENALLAGMA Charpentier 
The Bluets, ete. 
By C. Francis Byers 
This is the second largest genus of North American Odonata, num- 
bering 38 species, and being surpassed only by the Anisopterous genus 
