72 BuUctlu Wisconsin Natural History Society. [Vol. 6, ^^os. 1—2. 
Thorax deep blue, humeral black, not bifid above, wider than 
the antehumeral bipunctulata 
7. Thorax deep blue, stripes heavy and broad sedula 
ITiorax li^ht blue, stripes slight, obscure apicalis 
FEMALES. 
1. Wings colored 2 
Wings clear *^ 
2. Wings flavescent sedula 
Wings smoky brown fumipennis 
3. Segment 9 with some black 4 
Segment 9 entirelv vellow or blue. 
4. Basal half of 9 black apicalis 
Segment 9 entirely black tibialis 
5. Segment 7 dark, 8—10 yellow or blue; abdomen 25 mm violacea 
Segment 8 dark, 9—10 yellow or blue; abdomen 32 mm. . . .. .putrida 
Argia putrida Hagen, Syn. Xeur. X. Am., p. 96, 1861 ; Needham, 
Bull. 68 X. Y. State :S[ns.. p. 240, 1903 (Bibliography & Decs, of n^Tnph) ; 
Hagen & Calvert, Bull. AIus. Comp. Zool., 39. i>. 122, 1902 (Bibliography 
& Figure). 
Abd. male and female 32 ; h. w. male and female 25. 
Male. — Color gray or blackish. Dorsum of thorax and a lateral 
stripe black. Abdomen black, 3 — 7 with light basal rings. 
Female. — Brown and black. Abdomen bro^vTl above with a lateral 
black stripe on each segment. Stigma of both sexes covering more 
than one cell, that is. one cell and part of the next. 
Life Zone : Ti-ansition, Upper and Lower Austral. 
Wisconsin: :\Iilwaukee Co.; June 3-16, 1899, July 6-Aug. 8, 1902, 
July 1-Aug. 18, 1901, July 7-Aug. 17, 1903. 
Time and Habitat — Shores of lakes and rapid streams May to 
September. 
Argia violacea Hagen, Syn. Neur. N. Am., p. 90. 1861 ; Hagen & 
Calvert. Bull. Mus. Comp. ZooL 39, p. 116, 1902 (Bibliography & Figure) ; 
Needham, Bull. 68 X. Y. State Mus., p. 242, 1903 (Bibliography & Decs, 
of njTnph ) . 
Abd. male and female 25 — 26 ; h. w. male 20, female 21. 
^lale. — Violet. Thoracic stripes black, the humeral bifid above. 
Abdomen violet, apical rings on 2 — 6, and 7 entirely, black ; 8 — 10 blue. 
Female. — Brown or dull violet. Abdomen brown, lateral spots ex- 
tending upward, interrupted on dorsum. 
Life Zone : Transition and Upper Austral. 
Wisconsin : Xag'awicka Lake, Aug. 29, 1901 ; Waupaca, Aug. 15. 
1903 ; Milwaukee Co., July 1-6. 1902, July 1-15, 1903. 
Time and Habitat— June to September about large ponds and slow 
streams. 
Argia apicalis Say, Jour. Ac. Sci. Phila., 8, p. 40, 1839 ; Hagen, 
Syn. Xeur. X. Am., p. 91, 1861 ; Hagen & Calvert, Bull. Mus. Comp. Zool. 
39, p. 106, 1902 (Bibliography & Figure) ; Needham. Bull 68, X, Y. 
State Mus., p. 242, 1903 (Bibliography & Desc. of nymph). 
Abd. male 29, female 28 ; h. w. male 21, female 23. 
Male. — Color pale blue. Vertex, thoracic carina, humeral, suture 
