352 DRAGONFLIES OF NORTH AMERICA 
blue and black; of 3-7 and 10 brownish or yellowish; of 8-9 black bordered 
with blue. 
Homochromatic female, similar to the male. Postocular spots larger pro- 
longed to meet the pale color of the rear of the head. Middle lobe of the pro- 
thorax with an occasional additional geminate spot. Abdomen with the blue 
on 1—2 more extensive, 8-9 with the pale color more variable but usually more 
extensive also. 
Heterochromatic female like the homochromatic female but the orange color 
replaces the blue-green of the latter. 
351. Ischnura demorsa Hagen 
Hag. 61, p. 81: Mtk. Cat. p. 68. 
Length 24-27 mm. Expanse 26-34mm. Mont. and Colo. to Ariz. and N. Mex. 
Male. Head predominantly black with the mouth parts, the anteclypeus, 
vertical portion of the frons, and two small postocular spots, pale. Dorsum of 
the thorax with well defined blue antehumeral stripe, remainder metallic black, 
sides pale. Abdomen brassy green, the sides and basal rings on segments 3-6, 
yellow. Segments 8-9 entirely blue, or with a short basal black stripe on the 
sides of each, or in still other specimens, on the sides of one and not the other. 
Segment 10 black on the dorsum with the usual narrow elevated bifid process. 
Inferior appendages bifid. 
Females. Heterochromatic (orange). Postocular spots large, orange, and 
connected with the pale color of the rear of the head. Dark humeral stripe 
reduced to a mere line, consequently widening the pale orange antehumeral 
stripe, which becomes more than half as wide as the black middorsal stripe. 
Abdomen largely orange, becoming yellowish posteriorly, the following black 
on the dorsum: a basal spot on 1; a median line on 2; a median line on 3, except 
at base, expanded into a wide spot on apical fourth; a broad middorsal stripe 
on 4-7, more or less constricted at three-fourths the length of the segment; a 
stripe on each side of 8, the two confluent in the basal third or more; a basal 
spot on each side of 9. 
Homochromatic (black): Postocular spots small, circular and blue or green, 
not connected. Black humeral more than one-half as wide as the dark middorsal 
thoracic stripe, from which it is separated by a complete pale green antehumeral 
stripe, which is sometimes less than half as wide as the humeral. Dorsum of 1-10 
black. 
Variations of the above color forms may occur. These females may or may not 
have a ventral spine on 8. 
352. Ischnura barberi Currie 
Currie ’03, p. 302: Mtk. Cat. p. 68. 
Length 32-35 mm. Expanse 35-42 mm. Colo., N. Mex., Utah 
Greenish-yellow, blue and black in color. Head of the male pale beneath, 
with the occipital region and a line at the base of the labrum black. Postclypeus 
entirely shining black or black with a fine pale marginal line. Pale transverse 
frontal band reaching the basis of the antennal fossae. Antennae, the remainder 
of the frons, and the vertex, except for two small ocellar spots, black. Pale post- 
