Marshall—American Water Mites of the Genus Neumania. 211 
and curved. The body is slightly narrowed dorso-ventrally at 
the anterior end. The male measures 1.20 mm. in length. The 
female is unknown. 
Four individuals were found in the lakes at Delton, Wisconsin, 
in August, 1910. 
Neumania brevibrachiata nov. spec. 
Plate IY, figures 24, 25. 
This mite has a stout body and the epimeral plates cover nearly 
the entire ventral surface. The groups of plates are closely ap¬ 
proximated. The underlying braces from the first group are 
very short, barely reaching to the beginning of the fourth pair, 
and they are very narrow. The genital area is crowded to the 
extreme end of the body and touches the fourth pair of epimera; 
the plates in the male join at the anterior border, and the cleft 
is short. The legs are stout, the bristles moderately long; the 
last two joints of the fourth legs are unusually long. The length 
of the body in the male is 0.90 mm. The female is unknown. 
Two individuals of the species were found; one came from 
Lake Mason, Briggsville, Wisconsin, and the other from a small 
pond at Epworth Heights, near Ludington, Michigan. 
Neumania punctata nov. spec. 
Plate IV, figures 26-32. 
The epimeral region is very large, and very narrow spaces 
separate the three groups. The underlying braces from the first 
group extend back through half of the width of the fourth pair 
of plates. These last epimera are broad, with the posterior bor¬ 
ders concave and the corners sharply marked off. The genital 
plates are large and lie close to the fourth epimera, at the ex¬ 
treme end of the body; the clefts are large. In the male, the 
papillae at the outer ends of the plates are conspicuous. The 
first pair of legs are stout; the middle joints are well provided 
with long and heavy dagger-like bristles which arise from con¬ 
spicuous sockets. The fourth legs are thickly beset with bristles 
and coarse hairs of different lengths. In the palpi, the second 
joint is somewhat shorter and more bent then is usual; the hair 
papillae on the elongated fourth joint are small and bear fine 
hairs, while other fine hairs are found on the outer margin. The 
