1908] 
Muttkowski, Dragon Flies of Wisconsin. 
79 
Wisconsin : Lake Nagowicka, Ang-. 20, 1901 ; Delafield, Aug. 20, 
1902 ; Waupaca, Aug. 15, 1903 ; Milwaulcee Co., June 22, July 1, 17, Aug-. 
8, 1902, June 6. 14, 29, July 17. 1903. 
Time and Habitat — May to October near water, in woods and open 
places. 
SUB-ORDER ANISOPTERA. 
FAMILY AESCHNIDiE. 
SUB-FAMILY CORDULEGASTERINAE. 
A single genus is placed with this sub-family. Little is known 
of the habits of the species ; they are said to frequent ravines, gul- 
leys and gorges, and have been taken sparingly by collectors. Six 
species are found in the east, and a seventh is regional to the 
north-Vv^est. 
CORDULEGASTER Leach, Edin. Encycl. 9, p. 136, 1815 ; Needham, 
Proc. IT. S. Nat. Mus.. 26, w. 719, 732, 750, 1903 (Venation). 
The following tabella includes both males and females : 
1. Abdomen with mid-dorsal spots 2 
Abdomen with lateral spot 3 
Abdomen with yellow half -rings on the segments 5 
2. Spots bifid dorsalis 
Spots hastate obliquus 
3. Length of abdomen less than 60 mm 4 
Length of abdomen more than 60 mm. (65) fasciatus 
4. A single lateral spot on each segment diastatops 
A median and an apical lateral sx^ot on the middle segments . . 
maculatus 
5. Face yellow sayi 
Face blackish erroneus 
Cordulegaster obliquus Say, Journ. Ac. Sci. Phila 8, p. 15, 1839; 
Hagen, Syn. Neur. N. Am., p. 116, 1861. 
Abd. male 52, female 54 ; h. w. male 44, female 47. 
jNFale and female. — Brown or yellow and black. Face yellow, a 
black band across the middle. Thorax black, two short yellow diver- 
gent stripes on the dorsum, and two longer yellow stripes each side of 
the thorax margined in black. Abdomen black, a spot on 1, a stripe 
on 2, hastate spots on 3 — 8, a small basal spot on 9, yellow. The spots 
decrease in size toward the apex. 
Life Zone : Upper Austral. 
Wisconsin : Waukesha, June 9, 1902. 
Time and Habitat — ^klay to August near* lakes. 
Cordulegaster sayi Selys, Mon. d'Odon. 19, p. 331; Hagen, Syn. 
TN'eur. N. Am., p. 115, 1861. 
Abd. male and female 45 ; h. w. male and female 41. 
Male and female. — Color black, marked with yellow. Face yellow, 
a black band across the middle. Thorax with two yellow divergent 
stripes on the dorsum, and two lateral stripes also yellow, but longer 
and wider. Abdomen black, the segments with yellow half-rings. 
Life Zone : Transition and L'^pper Austral. 
Upper Wisconsin. 
' Time and Habitat : June to August about lakes. 
