Marshall—American Water Mites of the Genus Neumania. 209 
Neumania armata nov. spec. 
Plate III, figures 11-13. 
The members of this species are large, stout, dark mites with 
heavy plates. The posterior groups of plates are nearer to each 
other than are the anterior group to them. The fourth leg plates 
are broad, and their inner posterior corners end in conspicuous 
rounded points. The genital areas are small, with small aceta- 
bula. The legs are bluish, rather slender, with a moderate de¬ 
velopment of bristles and coarse hairs. The males measure about 
0.90 mm., the females about 0.95 mm. 
The individuals of this new species were found by the author 
in the lakes at Delton, and at Madison, Wisconsin; and also by 
Dr. R. A. Muttkowski in the Madison lakes. A total of eight 
males and six females was examined. 
Neumania extendens nov. spec. 
Plate III, figures 14-16. 
The epimeral area is extensive, the fourth plates are large, 
and the spaces between the groups are small. The genital area 
in the male is at the extreme end of the body, heavily outlined, 
broad, with slight extensions on the outer borders. The legs are 
rather slender with a moderate number of bristles, some of which 
are feathered. They are blue-tinged in mature individuals. 
The largest males measure 0.90 mm.; one small individual was 
found which measured but 0.50 mm. The female is unknown. 
Four individuals were examined. They were found by the 
author in collections from Epworth Heights, near Ludington, 
Michigan, and in two Wisconsin lakes, Mirror Lake, near Del- 
ton, and Lake Spooner, near Spooner; and one individual was 
found by Dr. R. A. Muttkowski in collections from Madison, 
Wisconsin. 
Neumania papillator nov. spec. 
Plate III, figures 17-20; Plate IV, figure 21. 
This new Neumania resembles N. spinipes (Miill.), the type 
species of the genus, widely distributed throughout Europe and 
reported also by Koenike from Africa. From this the American 
14—S. A. L. 
