A NEW ARRENURUS AND NOTES ON COLLECTIONS 
MADE IN 1903. 
RUTH MARSHAUL. 
During the summer and fall of 1903, dredgings were made 
in several new places in the state for Arrenuri; the results have 
been disappointing in the number of individuals found, hut two 
species having been added to the list reported a year ago (Trans, 
of Wis. Acad, of Sciences, Arts and Letters, 1903, Vol. XIV, 
Part I, p. 145-172, PI. XIV-XVIII). One of these species 
appears to be new ; both are here described. Only Arrenuri 
belonging to the subgenus Megalurus Then were studied. Most 
of the collections were made in July and August in Washburn 
County. This region is richly supplied with small lakes and 
ponds, most of them seemingly of glacial origin. All but one 
of those visited are: shallow, and have more or less extensive 
zones of marsh. The season was unusually cool, and during 
the latter part of the summer there were heavy rains. The 
bodies of water having similar features in southern and eastern 
Wisconsin have rarely failed, when examined, to yield Arrenuri. 
But in most cases none were found in these northern waters. 
A large number of collections were made in the shallows 
bordering the islands in Lake Spooner. Here were found, in 
small numbers, A. globator Mull., A. megalurus Mar., and A. 
manubriator Mar. In Pea sleeps Pond, a small pool on shore, 
were found A. globator Mull, and several individuals of the 
species A. Birgei Mar., whose color was rusty red instead of 
the usual blue green. The same species were found in Mud 
Creek, the outlet of Lake Spooner, a spring-fed stream!, the 
lower end of which is choked with water plants. Her© also was 
found, for the first time, A. caudatus (de Geer). On a trip 
about twelve miles to the northeast from Lake Spooner to the 
Little McKinzie Liver, collections were made in three small 
