1908] 
Muttkoicski, Dragon Flies of Wisco7isin. 
119 
wings, fiiscons. Abdomen with a mid-dorsal stripe of black, sides yel- 
loAV. Appendao-es bro^^'n. Adults have the marking's darkened 
with age, obsolete, or become pruinose. 
Female. — The female retains most of the yellow markings even 
when old, the abdomen with more yellow, the infuscated area at the 
apices of the wings larger, enveloping' the farther end of the stigma. 
Life Zone : Upper and Lower Anstral. 
Wisconsin : Milwaukee Co., June 1900. 
Time and Habitat — Lakes and ponds June to September. 
Libellula quadrimaculata Linne, Syst. Nat. 1, p. 543, 1759 ; Hagen, 
Syn. Neur. N. Am., p. 150, 1861; Needham, Bull. 47, N. Y. State Mus., 
p. 534, 1901 (Bibliog-rax)hy & desc. of nymph). 
Abdomen, male and female 29— 20"; h. w. male 34 — 37, female 36. 
Male. — Face olive, mouth parts yellow margined with black. Pro- 
thorax black, thorax olive or j^ellowish, covered with pile, the humeral 
and second lateral suture marked irregularly with black. Nervure and 
stigma black, costa lighter, costal area more or less yellow, the yellow 
more distinct toward the base. Fore wings with a fuscous dot at the 
outer side of the nodus, hind wing-s with an additional triangailar spot 
from the cubital space to half of the anal margin. At its outer end 
the spot sends olf a branch to fill the triangle and the supra-triang- 
ular space. Sometimes, but this rarely, there is a smoky patch below 
the stigma. Abdomen conical, the basal segments dilated, the apical 
segments very narrow. The color is olive or yellowish, a black band 
on 6 — 10, increasing in extent toward the apex, the sides with spots 
of bright yellow. Appendages black. This is the most robust of our 
species, stout in body, small of wing. 
Female. — Differs from the male by the stouter body and wider 
wings. 
Life Zone : Transition and Upper Austral. 
Wisconsin: Dane Co.: June 1890; June 2, 1900; Milwaukee Co.: 
June 4, July, 1899 ; Aug. 1. 1900 ; May 22— June 21, 1902 ; June 4, July 27, 
1903; July 1907; Door Co.: Jacksonport : June 26, 1905; Vilas Co.: 
Divide, June 24-30, 1907. 
Time and Habitat — Lakes, rivers and moist woods May to Augusts 
Libellula semifasciata Burmeister, Handbuch der Ent., 2, p. 862, 
1839 ; Hagen, Syn. Neur. N. Am., p. 151, 1861 ; Needham, Bull. 47, N. Y. 
Mus., p. 535, 1901 (Bibliography). 
Abd. male 26 — 30, female 28 ; h. w. male 33 — 37, female 35 — 36. 
Male. — Yellowish, marked with white and black, older specimens 
reddish. Face of tenerals yellow, adults blood-red. Thorax yellowish 
brown, sides with two white stripes. Legs brown, femora green be- 
neath. Wings hyaline, of a yellow tinge, nerv^ure and stigma red, the 
base of the wings, a spot surrounding the nodus, the apices of the 
wings including the stigma reddish brown. In addition the hind wings 
have a vague triangular patch at the anal margin separated from the 
basal streak. Abdomen yellowish, black on the dorsum of the apical 
segments, banded on the sides by yellow spots, which become red in 
older specimens. Appendages yellow. 
Female. — Differs by the wider abdomen and the transparent apices- 
of the wings. The only female I have seen has the markings of the 
wings of a decided brown color, darker than the male. At the stigma 
