1908] 
Muttkoivski, Dragon Flics of Wisconsin. 
95 
segments becoming- reddish brown with age. Appendages dark brown, 
the superiors as long as segment 9 and 10, the inferiors half as long. 
Female. — Differs from the male by the straight appendages and 
the rounded anal ang'le of the hind wings. Both sexes have the mem- 
branule of all the wings white. 
Life Zone : Transition and Upper Austral. 
Wisconsin : Milwaukee Co., AEilwankee River, Spring 1899. 
Time and Habitat — April to June along streams and ponds. 
NASI^SCHNA Selys. Foerster, Odonaton aus Neu-Guinea, 1900; 
Needham, Proc. U. S. Nat. Mus. 26, p. 718, 736, 755, 763, 1903 (Venation). 
The present genus heads the second group of Aeschnin^j dis- 
tinguished by the furcate subnodal sector. In common with two 
other genera, Bpiceschna and Aeschna, it separates from the fourth 
gQnns,Anax, by the position of the sectors of the arcu^us at their 
origin, as indicated by the table. Distinguishing it from its alUes, 
it is furnished with but a single row of cells between the subnodal 
and supplementary sectors. As a further distinction it might be 
mentioned that the principal and nodal sectors are sub-parallel 
opposite the stigma. The single species, penthacantha, was form- 
erly placed in Aeschna, but in a paper for the year 1901 Dr. Need- 
ham gave it its proper position under Nasiwschna. The imago 
resemble Aeschna constricta, from which it is readily distinguished 
by the absence of a black spot on the frons above, and the vena- 
tion. Although the species has been taken in Illinois, it is not 
likely to be found in Wisconsin. It appears to be regional in the 
Austral Life Zone. 
EPIv^SCHNA Slys, Proc. Post. Nat. Hist. Soc. 18. p. 36, 1875 ; 
Needham. Proc. U. S. Nat. Mus. 26, p. 718, 736, 755, 762, 1903 (Venation). 
Besides the difference indicated in the table, Bpi^schna is dis- 
tinguished from Nasit^schna by the fact that the nodal sector 
approaches the principal sector opposite the stigma. One species 
is recorded from the United States. 
Epiaeschna heros Fabricius, Ent. Svst. Suppl., p. 185. 1798; Hagen, 
Syn. Neur. N. Am., p. 128, 1861 ; Needham, Bull. 47 N. Y. State Mus., 
p. 469, 1901 (Bibliography & Desc. of nymph). 
Abd. male 62 — 66; female 67; h. w."^male 54 — 56; female 59. 
Male. — Brown, with green markings. Face brown and green, eyes 
blue. Thorax with two dorsal stripes of green, widened above to an 
inward angle. Sides eacji with, two broad stripes of green. Legs 
black, the femora brown, darkened apically. Wings hyaline, the 
median area below the nodus tinged with yellow, nervnire black, costa 
and stigma light brown. Abdomen brown, each segment crossed by 
a transverse carina at the basal third, marked with green transverse 
stripes or spots at the base, the apex and before the transverse carina. 
All stripes divided by the dorsal longitudinal carina. Sides wdth spot 
at the carina green. Superior appendages black, trigonal, as long as 
9 and 10. Segment 10 with a middle acute prominence marking the 
end of the mid-dorsal carina. 
