206 Wisconsin Academy of Sciences, Arts, and Letters. 
the outer ends of the plates show conspicuously in prepared 
slides (fig. 4). 
The palpi are small and more slender than the first pair of 
legs. The third joint has stout bristles, and the flexor side of 
the fourth joint has two small, hair-bearing papillae. The fifth 
palpal joint ends in three or four little finger-like processes. 
The first leg is the most characteristic one for the genus. It 
is stout and bears many dagger-like spines set in chimney-like 
papillae on the flexor surfaces of the middle joints; it usually 
appears strongly flexed in the proximal third of its length. The 
second pair of legs are much like the first but are somewhat 
shorter. The third and fourth legs are more slender than the 
first two and bear long, slender bristles, as well as many short, 
stout ones, the latter sometimes feathered. All the legs end in 
delicate double claws. The basal joints are stout; the successive 
joints become longer and slimmer. 
The Neumanis are beautiful little creatures when viewed alive 
under the low power of the miscroscope. The delicate integu¬ 
ment is semi-transparent, and the internal organs appear as 
brown areas with pink, yellow or white patterns. The legs and 
plates are often blue-tinged. The legs are long, and these mites 
are active swimmers. They are fairly abundant in the shallow 
waters of ponds and lakes where there is some current. 
Eleven species are described in this paper, all of them new. 
Material from four states has been examined, which yielded 
seventy-two individuals. The author’s material was collected 
in Wisconsin, Illinois and Michigan. It was supplemented by 
valuable collections taken from the lakes at Madison, Wisconsin, 
by Dr. R. A. Muttkowski, and by other material from Louisiana, 
collected by Dr. E. A. Birge, and very kindly turned over to the 
author. 
Neumania ovata nov. spec. 
Plate II, figure 1. 
This is a large mite, the female measuring 1.2 mm. It resem¬ 
bles N. limosa (C. L. Koch) and N. triangularis Piersig, two widely 
distributed European species, but differs from them in the form 
of the epimera and genital areas. The epimeral region is small; 
the plates are bluish and widely separated, the space between 
the posterior ones gradually widening. The braces from the an- 
