PRELIMINARY NOTES ON THE ODONATA. 93 
their distribution was limited to an area of 200 yards along this little 
rivulet, so narrow that one could easily leap across it anywhere, and 
but a few inches deep. Again in 1914 they were common here and 
nowhere else. Such a localization is not what would be expected of a 
species distributed from the Atlantic to the West. 
Genus Enallagma Charpentier. 
E. carunculatum Morse. Innumerable specimens were taken at 
Lake Madison, August 4-11, 1914. Wilson took the species at Lake 
Phalen, Ramsey County, July 8, 1907. 
E. civile Hagen. A few males were found among other Enal- 
lagmas collected at a pond near Mankato on June 14, 1913, and during 
October, 1914, several more specimens, male and female, were brought 
in by students. Three males were netted at Lake Madison, August 8, 
1914. Civile resembles carunculatum in everything except the ap- 
pendages of the male. 
E. hageni Walsh. From the middle of May until September FE. 
hageni is the most plentiful and universally distributed Enallagma in 
southern Minnesota. During June it is usually present about ponds in 
such numbers as to be taken by the netful rather than as individuals. 
Masses of algae, sphagnum or other floating vegetation are dotted with 
its bright blue and black. 
Wilson has taken it all along the Mississippi River, “hundreds at 
a sweep of the net.” 
E. ebrium Hagen. Records at Mankato for males July 6, 1912, 
June 14, 1913, and July, 1914. Taken by Wilson at Minneapolis, St. 
Paul, Red Wing, and Winona from July 8-19, 1907. Common; usually 
in company with EF. hageni. 
E. signatum (Hagen). “Quite common flying about the floating 
algae.” Wilson, St. Paul, July 8, 1907. Taken by the writer at Center 
Lake, Dickinson County, Iowa, July 13, and at Lake Okoboji, June 29, 
1909. A companion of antennatum and hageni, and Nehalennia irene 
in the marginal grasses. 
E. antennatum (Say). “Rare, only a few seen; found on rushes 
over water.’’ Wilson, Lake Phalen, July 8, 1907. Probably not com- 
mon in the Transition Zone, though fairly so in the Austral. 
Genus Coenagrion Hagen. 
C. angulatum Walker. Two males of this recently described 
species* were picked up with a lot of Enallagma hageni and Nehalennia 
* Canadian Entomologist for September, 1912. See also “New Species of 
Dragon-flies,’ by Richard A. Muttkowski. Bulletin of Wisconsin Natural 
History Society, Vol. X, Nos. 3 and 4. 
