106 BuUetin Wisconsin Natural History Society. [Vol. 6, Xos. 1 — 2. 
with hind tibi«Te and femora equal in length ; sexes with dis- 
similarly colored wdngs- Plathemis 
12. Hind wings with a broad basal fuscous band, the cells within 
the colored area finely meshed Tramea 
Hind wings not banded, the anal ang'le colored ; the cells of 
the anal not small, normal in size Pantala 
NANNOTHEMIS Brauer, Vern. zool..-bot. Gesellsch. Wien, p. 369, 
726, 1868; Xeedham. Proc. U. S. IS^at. Mus. 26, p. 740, 1903 (Venation). 
Several species of this genus are known, but onlv a single one 
flies as far north as the Upper Austral and occasionally onto 
the Transition life area. If found, the species will be easily rec- 
ognized from the foursided triangle. It flies in June around 
ponds and over marshes. 
PERITHEMIS Hagen, Syn. Neur. N. Amer., p. 185, 1861 : Xeedham, 
Bull. 47 X. Y. State ]Mus., p. 512, 1901 (Bibliography & Decs, of nymph) ; 
Xeedham, Proc. U. S. Xat. :Mus., p. 718, 1903 (Venation). 
Of the several species one is found in Wisconsin. 
Perithemis doniitia Drurj-, Ex. Ent. 2, p. 83, 1773 ; Xeedham, Bull. 
47 X. Y. State Mus., p. 512, 1901 (Bibliography & Desc. of nymph) ; 
Xeedham, Proc. U. S. Xat. Mus. 26, p. 763, 1903 (Venation). 
Abd. male 14 — 15, female 13 — 14 ; h. w\ male 18, female 19. 
Male. — Color 3'ellowish brown. Face brown, a green band across 
the middle. Thorax laterally with two pale stripes on each side. Legs 
brown. Wings of uniform amber color, a brown spot at the end of 
the triangle on all wings. Hind wings with a basal streak of brown 
in the sub-costal space. Costa and stigma dark brown. Abdomen 
uniform brown, the sides a trifle lighter. Appendages yellow. 
Female. — Body similar to the male in markings. Wing's white, 
hyaline, yellowish along the costa, a fuscous blotch at the end of the 
triangle reaching- to the sub-costal vein, a larger blotch between the 
nodus and the stigma. These markings are greatly variable in size 
and intensity, grading' from insignificant blotches to bands reaching 
across the whole breadth of the wrings. 
Life Zone : Upper and Lower Austral. 
Wisconsin : Kenosha Co., Paddock's Lake, July 6, 1900. 
Time and Habitat — ^lay to August about ponds and marshes. A 
timid, w^eak species, loving' the sunshine. 
CELITHEMIS Hagen, Syn. Xeur. X. Ain., p. 147, 1861 ; Xeedham, 
Proc. U. S. Xat. :\[us. 26, p. 742, 1903 (Venation). 
This genus includes but four species, numbering among the 
prettiest flyers of our odomate fauna. In general they prefer the 
lakes for their habitat, clinging to the deep swaying rushes of the 
shores, though occasionally they are also found along streams. The 
species are easily separated by the color-pattern of the wings, 
which, in contrast to the preceding species, varies but slightly in 
intensity and extent of the markings. 
1. Wings hyaline, with markings at the apices 2 
Wings yellow, without apical markings, a broad fuscous band 
traversing the wing just before the stigma eponina 
