116 
Bulletin Wisconsin Natural History Society. [Vol. 6, Nos. 1 — 2. 
two other species have been taken in the state. The genus differs 
from Mesothemis by the stouter body and the dilated basal seg- 
ments of the abdomen, from Lihellula by the short stigma and 
other characters mentioned in the table. 
1. Dors am of thorax with two black humerals ; anal fuscous spot 
not including- the triangle Julia 
Dorsum of thorax with two white antehumerals ; anal fuscous 
spot including the triangle exusta 
Ladona julia Uhler, Acad. Nat. Sci. Phila., p. 88, 1857 ; Hagen, Syn. 
Neur. N. Am., p. 153, 1861; Needham, Bull. 47, N. Y. State Mus., p. 530, 
1901 (Bibliography & desc. of nymph). 
Abd. male and female 22 ; h. w. male 33 — 34, female 33. 
Male. — Frons and mouth-parts bright yellow. Thorax brown, two 
black humeral stripes preceded each by a white antehimieral. Legs 
dark brown, all femora luteous. Wings hyaline, nervure, costa, and 
stigma brown, fore wings with two streaks in the basal and sub-costal 
space, hind wings with yellow between the streaks and a triangular anal 
spot. Abdomen with the basal segments dilated, largely yellow, a dorsal 
spot on each side of the mid-dorsal carina on each segment. Older 
specimens have hardly any markings, becoming pruinose on the thorax 
and the four basal segments of the abdomen. Appendages yellow. 
Female. — The face without yellow. Thorax above whitish to the 
humerals. Abdomen with yellow, blackening with age, rarely pruinose. 
Life Zone : Transition and Upper Austral. 
Wisconsin : Milwaukee Co., June 1900. "Inhabits Wisconsin" 
Hagen. 
Time and Habitat — June and July about marshy ponds and lakes. 
Ladona exusta Sav, Journ. Ac. Sci. Phila., 8, p. 29, 1839 ; Hagen, 
Syn. Neur. N. Am., p. 155, 1861; Needham, Can. Ent. 29, p. 146, 1897; 
Needham, Bull. 47, N. Y. State Mus., p. 529, 1901 (Discussion of char- 
acters). 
Abd. male 25, female 23; h. w. male 31—33, female 30—31. 
Male. — Dark brown. Similar to the preceding species. Thorax 
brown, two antehumerals of white. Legs brown, the femora lighter. 
Wings hyaline, nervure black, stigma and costa brown, fuscous streaks 
in the sub-costal and basal space, hind wing the anal triangular spot 
covering the triangle. Some yellow about the streaks. Abdomen with 
a dorsal band of black and lateral spots, disappearing in adults. Ap- 
pendages yellow. The anterior branch of the genital hamule, accord- 
ing to Prof. Needham, is bent toward the rear, on line with the abdo- 
men, not sideways as julia. 
Female. — Similar. More yellow on the abdomen. 
Life Zone : Transition and Upper Austral. 
Wisconsin : "Eacine" (Hagen) ; Dane Co., June 1890. 
Time and Habitat — Lakes and ponds in June and July. 
LIBELLULA Linne, Syst. Nat. 1, p. 543, 1758 ; Needham, Proc. U. 
S. Nat. Mus. 26, p. 721, 742, 1903 (Venation). 
The present genus contains many of our finest and most dar- 
ing dragon-flies. From early June to late September they can 
be seen near the reeds and bushes of lake shores and rivers, or in 
moist woods, flying along with a jaunty swaggering air, or dart- 
