Marshall—Some New American Water Mites. 1303 
•A. semicircular is Piers. 
A. manubriator Mar. 
A. marshalli Piers; found also in Lake Mason, Briggsville, 
Wisconsin 
A. megalurus Mar; found also in Lake Mason. 
A. americanus Mar; found also in Lake Mason and at Urbana, 
Illinois. 
A. magnicaudatus Mar, in Lake Mason. 
In Sebago Lake, Maine, there were found six species, all here 
recorded for the first time from this state: 
A. crenellatus Mar. (PI. I, fig. 9-11) 
A. scutuliformis Mar. 
A. marshalli Piresig. 
A. parallelatus Mar. 
A. elevatus nov spec. (PI. I, fig. 12-15; Plate II, fig. 16) 
A. americanus Mar; found also in Long Lake, near Sebago; 
at Clinton, New York, and at Princeton, New Jersey, the first 
record for the latter state. 
A. birgei Mar. was also found for the first time in New Jersey, 
at Princeton, Carnegie Lake; and A. major Mar. for the first 
time for Maryland in Carderrock pool, near Washington, D. C. 
