168 Wisconsin Academy of Sciences, Arts, and Letters. 
EXPLANATION OF PLATE XYI. 
3 a, Arrenurus manubriator nov. spec., dorsal view. 
c, Arrenurus manu'briator nov. spec., lateral view. 
d, Arrenurus manubriator nov. spec., palpi. 
6 a, Arrenurus parallellatus nov. spec., dorsal view. 
b, Arrenurus parallelatus nov. spec., ventral view. 
c, Arrenurus parallellatus nov spec., lateral view. 
10 a, Arrenurus Birgei nov. spec., dorsal view. 
b, Arrenurus Birgei nov. spec., ventral view. 
c, Arrenurus Birgei nov. spec., lateral view. 
d, Arrenurus Birgei nov. spec., palpi, 
f, Arrenurus Birgei nov. spec., 4th leg. 
