92 Bulletin Wiscoui^in Xatiiral History Societv. [Vol. 6, Nos. 1 — 2. 
constricted on each seg-ment, near the base and the apex, interrupted 
apically on the seo-ment. ending on segment 8 and 9 as basal triangular 
spots. Sides of the segments largely yellowish green. Appendages 
black. 
Female.— Similar. An acute black spine on the vertex behind each 
lateral ocellus. Occiput with a median notch, from which arises an 
acute spine. Dorsum of segment 10 green. 
Life Zone : This is widely extended. The species has been taken 
in the Transition, Upper and Lower Austral, and also in the Gulf strip 
of the Lower Austral areas. 
Wisconsin : Door Co., Horseshoe Ba^*, July 13, lOOo. 
Time and Habitat — June to July about shores of lakes and shaded 
rivers. 
Dromogomphus spoliatus Hagen. Mon. Gomph.. p. 409. 1857; Syn. 
Xeur. X. Am., p. 103, 1861 : Kellicott. Dragon-flies of Ohio, p. 72, 1899 ; 
Williamson, Dragon-flies of Indiana, p. 297, 1900. 
Abd. male 45—46, female 47; h. w. male 37. female 38. 
!Male. — Yellow, or pale green, and broAvn. Face and occiput green, 
vertex dark brown. Thorax marked like spinosus. Legs yellowish, 
fore femora with a green stripe beneath. Wings hyaline, costa and 
nervure yellowish, pterostigma ver\' pale yellow, nearly white. Ab- 
domen dark brown, a stripe on the dorsum green, ending as a lanceo- 
late basal spots on 8. Dorsum of 10 green. Sides of 1 — 2 yellowish, 
basal spots on 3 — 9. Appendages dark brown. 
Female. — Similar. Abdomen with lighter brown and greenish on 
sides and dorsum. Occiput with an obtuse median prominence. 
Life Zone : Transition, L^pper Austral. This species seems less 
abundant than the preceding, since at present it is known from but 
three states, Texas, Ohio and Wisconsin. 
Time and Habitat — June to July over fields and banks of lakes and 
streams. 
Wisconsin: Door Co., Washington Island, July 7, 1907; Vilas Co., 
Divide, June 24-29, 1907. 
There is some doubt as to the accuracy of the identification for a 
female from Washington Island. This specimen has the occiput with 
a median notch, from which arises a stout median spine. In this it 
resembles spiiiosus. Likewise it has a long acute spine behind each 
lateral ocellus on the vertex, but the spine is yellow instead of black. 
Also, the femora are largely yellows 
SUB-FAMILY AESCHNINAE;. 
The sub-family contains some of our largest and most vora- 
cious dragon-flies. In truth, of all the groups of Odonata they 
best merit the name of ''dragon-flies", since in their nymphal stage 
there is hardly any animal they are able to capture upon which 
they do not prey. They are inclined to be cannibalistic, feeding 
upon their kind with great relish. The imagoes fly early and late 
in the season ; that is, they are among the first to appear in the 
spring, and last to vanish in autumn. They frequent open places, 
mostly where some trees or bushes offer a ready hiding-place for 
