78 
Bulletin Wisconsin Natural History Society. [Vol. 6, Nos. 1 — 2. 
Abd. male 28, female 27 ; h. w. male 17, female 18. 
Male. — Color orange, marked with green and black. Thorax with 
black carina and humerals, also a stripe on the second lateral suture. 
Dorsum of abdomen black, an apical ring- on 1. l^asal interrupted rings 
on 3 — 7, 9 and sides of 10 yellow. 
Female. — Thorax orange and green. Abdomen like male. 10 
entirely yellow. 
Life Zone : Transition and Upper Austral. 
Wisconsin: Little Cedar Lake, July 29, 1907. 
Time and Habitat — June to September in reeds of lake shores. 
Enallagma pollutum Hagen, Syn. ISTeur. N. Am., p. 83, 1861 ; Xeed- 
ham. Bull. 68 X. Y. State. Mus., p. ^258, 1903 (Bibliography). 
Abd. male and female 28 ; h. w. male 17 — IS, female 18. 
^lale. — Color bright yellow to orange. Thorax yellow, mid-dorsal 
stripe wide, green, humeral narrow, often indicated only by a spot on 
the suture above and below. Dorsum of abdomen green, darker 
apically on the segments. Pale interrupted ba^sal rings on 3 — 7, 9 and 
10 blue, the appendages yellow. 
Female. — Dorsum of abdomen black, interrupted rings on 3 — 7, 
apex of 9 and 10 entirelj^ yellow or blue. 
Life Zone : Transition, Upx^er and Lower Austral. 
Wisconsin: Little Cedar Lake, July 29-Aug. 15, 1907. 
Time and. Habitat — June to September in reeds of lake shores. 
ISCHNURA Char]3entier, Lib. Eur., p. 20, 1840. 
A single species of this genus has been found in Wisconsin. 
The male imagoes resemble some of the Enallagma with their 
markings. The female is considered dimorphic, two distinct color 
types are found, often in the same brood. 
Ischnura verticalis Say Journ. Ac. Phila., 8 :37, 1839 ; Hagen, Syn. 
Neur. N, Am., p. 76 & 82, 1861 ; Kirby. SynomTnic Cat., 1890 ; Needham, 
Bull 68 N. Y. State Mus., 261, 1903 (Bibliography & Desc. of nymph). 
Abd. male 20, female: black 21, orange 22; h. w. male 13, female: 
black 14, orange 15. 
^lale. — Green, postocular spots blue. Mid-dorsal and humeral 
stripes wide and black. Dorsum of abdomen black, pale rings apically 
on 1, basally and interrupted on 3 — 7, 8 and 9 bright blue with black 
lateral stripes. Pterostigma of front wings black, of hind wings pale 
brown. 
Black female. — Like males. Abdomen black, sides paler, segments 
darker apically. Pterostigma light brown or yellow on all wings. 
Orange female. — Orange and black. Face and occipital spots 
orange, vertex black. Thorax with mid-dorsal stripe wide, black, the 
humeral narrow, linear. Abdomen with first three segments orange, 
segments 4 — 10 black. Segment 3 has a fine basal and a wider apical 
ring. The amount of black on the three orange segments is varied. 
Segment 1 often has a dorsal basal linear spot. Some specimens have 
also an apical spot on 2. The amount of black on the apex of segment 
3 is quite variable, extending over one-fourth to one-half of the seg- 
ment. A linear stripe is sometimes evident on the dorsum of the first 
three segments. 
Life Zone : Transition, L^pper and Lower Austral areas. 
