1908] 
MiittkoivsJci, Dragon Flies of Wisconsin. 
109 
Apical third, or more, of the genital hamule bifid, the fissure 
oval in shape ; yellow^ of wing-s reaching- to or exceeding the 
first antecnbital, vulvar laiiiina of two inflated lobes, the 
apices divergent rubicundulum 
8. Branches of the genital hamule equally long, the exterior 
stout, triangular, the interior slender, curved ; vulvar lamina 
bifid, triangular, the apices divergent decisa 
Exterior branch of the genital hamule longer than the 
interior, the latter wider than the exterior; vulvar lamina 
bifid, the lobes conical contiguous to apex obtrusum 
9. Yellow of wing's restricted to extreme base 10 
Yellow of wings reaching to the nodus semicinctum 
10. Femora and tibiae marked with black 11 
Femora and tibiae entirely yellow vicinum 
11. Feet entirely black /. , 12 
Feet entirely yellow costiferum 
12. Appendages black scoticum 
Appendages yellow or red atripes 
Of these species five have been taken in the state and two others 
will probably be found in the southern portions. 
Sympetrum corruptum Hagen. Syn. Neur. N. Am., p. 171, 1861 ; 
Needham, Bull. 47 N. Y. State Mus., p.\525, 1901 (BibliogTaphy) . 
Abd. male and female 28 ; h. w. male 29 — 31, female 30. 
]Vrale. — Face yellow, suffused with red in older specimens, an olive 
band below the frons. Thorax yellowish in young specimens, an ante- 
humeral, humeral, and two lateral stripes whitish, the lateral stripes 
ending below in two bright yellow spots margined in black. In older 
specimens the strij^es become obsolete, but the spots remain. Legs 
with yellow and black stripes, feet black. Wings hyaline, the nervure — 
especially toward the costa— -bright red, stigma reddish fuscous, costa 
red. Abdomen yellowish or red, a series of bright yellow spots on the 
sides of each seg-meut. Segments 8 — 9 marked with black on the sides 
and on dorsum. Appendages bright yellow, or reddish. Appendages 
cylindrical, thickened apically, several inferior denticles. Young 
specimens are chiefly yellow, older ones become red. 
Female. — The female usually retains the yellow face in age instead 
of becoming' red, Avhile the appendages are less often of a reddish color. 
Vulvar lamina very short, broadly emarginate. 
Life Zone : Upper Austral. 
Wisconsin: Dane Co., Julv :10, 1900; Milwaukee Co., June 4, 1899, 
June 10-July 14. 1900, Aug. 1901, July 26, 1902, July 7-17, 1903. 
Time and Habitat — Lakes, rivers and moist woods from June to 
September. 
Sympetrum assimilatum Uhler. Proc. Acad. Nat. Sci. Phila., p. 88, 
1857; Needham, Bull. 47 N. Y. State Mus., p. 524 (Bibliography). 
Abd. male 25—28, female 23—27; h. w. male 28—30, female 26— 29. 
^fale. — Colors in graded shades of yellow to reddish. Face olive 
to pink. Thorax reddish above, sides bright yellow. Legs black, fore 
femora greenish yellow beneath. Wings hyaline, nervure black, stigma 
reddish fuscous, costa yellow. Basal half of the wings to the nodus 
yellow. Abdomen yellow to red, sides with apical triangular spots on 
