1928 ] 
A New Species of Water Mite 
95 
species but differs from it in several well marked characteristics. 
Specific characters of greatest importance in T. nevadensis appear 
to be the development of the heavy plate posterior to the epimera, 
the characters of the palpi with the large curved bifid bristles on 
the second segment; and the character of the fourth leg of the 
male with its last three segments elongated as well as flattened 
and richly supplied with stiff hairs. 
/ 
Literature Cited. 
1. Brues, C. T. 1924. Observations on Animal Life in the 
Thermal Waters of Yellowstone Park, 
with Consideration of the Thermal En- 
vironment. Proc. American Acad. Arts 
and Sci., vol. 59, pt. 15:371-437. 
2. Plateau, F. 1870. Recherches physico-chimiques sur les 
Articules aquatiques. Pt. 1, Mem. 
Acad. Roy. Sci. Belgique, vol. 36, 68 pp. 
3. Sokolow, 1 . 1927. Thermacarus thermobius , n. g., m. sp., 
eine Hydracarine aus heisser Quelle. 
Zool. Anz., LXXIII: 11-20. 
4. Uchida, Tohru. 1927. Notes on a new Water Mite from a Hot 
Spring. An. Zool. Japonenses, Vol. 11, 
2: 111-114. 
