96 Bulletin Wisconsiii Natural History Society. [Vol. 6, Nos. 1 — 2. 
Female. — Segment 10 with a triangular prominence beneath, den- 
ticulate at the apex. Vulvar lamina enclosed ; longer than 9, curved, 
the apex bifid, acute, the points diverging and reaching into a groove 
in the prominence on the sternum of segment 10. 
Life Zone : Common throughout the Transition and Austral areas. 
Wisconsin : ISIilv^aukee Co., Spring 1899, July 1900, June 8, 1906. 
Time and Habitat — May to September, in v^oods and open places. 
/ESCHNA Fabricius, Syst. Fnt., p. 424, 1775 ; Needham, Proc. U. S. 
Nat. Mus. 26, p. 732, 734-737, 1903 (Venation). 
A genus of wide distribution, numbering above 50 species. 
Three species have been found within the state and it is possible 
that one or two others will be found. The species separate as 
follows : 
1. Males. — Hind Avings with the anal angle acute, containing an 
anal triangle 2 
Females. — Hind wings with anal angle rounded ; no anal tri- 
angle 4 
2. Anal triang-le of two cells ; three dorsal transverse spines on 10. 3 
Anal triangle of three cells ; no dorsal spines on 10 ; appen- 
dages with an inferior apical spine constricta 
3. Superior longitudinal carina of the superior appendages even. . 
verticalis 
Superior longitudinal carina of the superior appendages dentic- 
ulated clepsydra 
4. Genital valve strongly elevated at apex; vulvar lamina about 
2 mm.; width of appendages 2 — 21/2 mm constricta 
Genital valves not strongly elevated at apex ; vuh ar lamina 
about 1 mm.; width of appendages 1 — ly^ mm verticalis 
>Eschna constricta Say, Journ. Ac. Phila, 8, p. 11, 1839 ; Hagen, 
Syn. Neur. N. Am., p. 123, 1861. 
Abd. male 55 — 59, female 53 — 54 ; h. w. male 46 — 49, female 44 — 47. 
]\rale. — Brown, marked with bright and blue. Face green, 
rarely brown, frons with a black T spot above. Occiput white cen- 
trally. Thorax with two dorsal stripes green, each side with two 
greenish stripes, widest above. Legs dark brown. Wings hyaline, the 
nervure dark, costa light brown, stigma brown. Abdomen with apical 
spots on the dorsum and basal spots on the sides green and blue. Seg- 
ment 10 above green or blue, appendages light brown. 
Female. — The female has less blue than the male on the abdomen. 
The wings are often tinged with yellowish, the appendages are longer 
and leaf shaped. 
Life Zone : Widely distributed through the Boreal, Transition and 
Upper Austral areas. 
Wisconsin : :Milwaukee Co., July 10, 12, Aug. 24. Sept. 6, 1902 ; 
July 27, 1903 ; Sept. 5, 1904 ; Dane Co., July 1900. 
Time and Habitat — June to October along shores of lakes and 
streams. 
Aeschna verticalis Hagen, Syn. Neur. N. Am., p. 122, 1861. 
Abd. male 52, female 53—54; h. w. male 45 — 46, female 46 — 48. 
]\£ale. — Color reddish brown, marked much like constricta. Ab- 
domen not so thick. The female has the sternum of segment 10 cov- 
