350 DRAGONFLIES OF NORTH AMERICA 
yellowish. Postocular spots small, round, blue and isolated. A narrow green 
postocellar stripe present on the causo-mesal margin of the head. Remainder 
of the head black. Prothorax with the anterior lobe and the sides of the middle 
lobe pale, remainder black. Thorax with wide middorsal and humeral black 
stripes. The pale antehumeral stripe present and complete though narrow. 
A black basal spot on the second and third lateral sutures, that on the latter 
followed by a pale black line. Stigma bicolored, the outer margin white, the inner 
black, the stigma of the fore wing much larger than that of the hind. Dorsum 
of abdominal segments 1-8 and 10 black except for an apical ring on 1 and 
interrupted basal rings of yellow on segments 4-7. Segment 9 blue. The dorsal 
apical process on segment 10, very long and tubular, notched only at the extreme 
tip. The superior appendages long and delicate, consisting of two processes, 
one, black in color, directed backward, the other, yellow, directed ventrally. 
Female. Homochromatic only. Young specimens bright orange and black, 
older ones as in male. Head asin male. Thorax with the black mid-dorsal stripe 
about .5 mm. wide, a distinct spot on the meso-, inter-, and metapleural sutures 
at the base of each wing, and an indistinct short stripe on the interpleural suture 
bronze. First abdominal segment indistinctly darker apically; 2-3 with dorsal 
apical rings of bronze, and 3 with a subapical dorsal spot; 4 with a dorsal stripe 
occasionally apical six-sevenths of the segment apically abruptly dilated into an 
urn-shaped spot; from segment 4 the bronze dorsal stripe is continuous, with 
narrow basal interruptions at each segment, to one-third the length of 9; re- 
mainder of the abdomen yellow. No ventral spine on the apical margin of ab- 
dominal segment 8. 
348. Ischnura ramburii Selys 
Selys ’50, p. 186: Mtk. Cat. p. 70: Garm. ’27, p. 43. 
Syn: iners Hag., senegalense Ramb., tuberculatum Selys 
Length 32 mm. Expanse 33 mm. R.I., to Fla. and Tex. to Tropics 
Labrum with the base black. Postclypeus, horizontal portion of the frons, 
antennae, vertex and the occiput, black. Remainder of the head pale. Postocular 
spots, small, round, green and isolated. The sides of the middle prothoracic lobe 
and the dorsum of the anterior lobe pale, remainder of the prothorax black. 
Black mid-dorsal and humeral thoracic stripes wide. The pale antehumeral 
stripe narrow and complete. A black spot at the base of the second lateral suture; 
a black line on the third lateral suture. Abdomen with the dorsum of abdominal 
segments 1-7 and 9-10 metallic black, with narrow, interrupted, yellow basal 
rings on 3-7. Segment 8 blue with a black basal ring. 
The females of ramburii exhibit the dichromatism so common to many of 
the Ischnuran species. The Homochromatic (black) female is colored like the 
male. The Heterochromatic (orange) female has the blue or green of the male 
replaced by orange. The postocular spots large and confluent with the pale color 
of the rear of the head. Thorax orange with the customary black mid-dorsal 
stripe but no humeral stripe. Abdominal segment 1 and the base of 2 orange, 
remainder of the abdomen black on the dorsum. 
349. Ischnura posita Hagen 
Hag. ’61, p. 77: Mtk. Cat. p. 69: Garm. 717, p. 570 and ’27, p. 41. 
Length 24-29 mm. Expanse 26-36 mm. Me. and N. Dak. to Fla. and Mo. 
