94 PRELIMINARY NOTES ON THE ODONATA. 
irene at a little kettle-hole at Mankato on June 10, 1913. It flies rather 
low over the water between grass tufts a foot or two from the shore. 
Its short heavy body and bright blue and black coloration quickly 
catches the eye of the collector. In Iowa it was taken with Coenagrion 
resolutum Hagen. 
Genus /schnura Charpentier. 
I. verticalis Say. Innumerable specimens taken at Mankato from 
May to September, including both sexes. It was very common at Lake 
Madison, August 4-11, 1914, and here the orange females predom1- 
nated. Found at Minneapolis and St. Paul by Wilson, July 6-8, 1907. 
Ischnura is as constantly present as Enallagma hageni, though never 
in great numbers, and in the same habitats. 
I. posita (Hagen). ‘Found in company with Enallagma hagent 
and E. ebrium everywhere; not as plentiful as the former but more 
so than the latter.’’ Wilson, Beaver Lake, St. Paul, July 10, 1907. 
Also at Winona, July 19. 
SUB-ORDER ANISOPTERA, THE DRAGON-FLIES. 
FAMILY AESHNIDAE. 
SUB-FAMILY GOMPHINAE. 
Genus Hagenius Selys. 
H. brevistylus Selys. A single male specimen of this conspicuous 
dragon-fly was found by the writer in the collections of the Mankato 
State Normal School. It bore the label “Mankato” only, without date. 
Occasional specimens have been collected throughout every faunal zone 
from the Boreal to the Lower Austral, usually over swift water in 
large streams. In New York, Needham also found the nymphs plen- 
tiful in ponds. 
Genus Gomphus Leach. 
G. fraturnus Say. Pair in copulation taken at Mankato, June 11, 
1913. Wilson found both sexes common from St. Paul to Red Wing, 
July 12-17, 1907. It is very often taken in pastures and open wood- 
lands back from the rivers. About rapids they dart swiftly here and 
there above the turbulent water, dash in and out of the leafy arches 
along the banks or rest tightly flattened against the boulders in mid- 
stream. Common to the Transition and Upper Austral Zones. 
G. externus Selys. Both sexes taken by Wilson at Red Wing, 
Minn., and at Lansing, Iowa, July 17-24, 1907. 
