The figures on plates XIV, XV and XVI were made 

 by the three color process and unfortunately the printer 

 could not proportion the red to the exact shade of the origi- 

 nal colors. 



In the originals the blue is more of an indigo blue, the 

 yellow nowhere has the orange tint and the brown does not 

 have an evident reddish tint. In short, the red, wherever 

 it is evident in the figures, should be repressed. 



Henry F. Nachtrieb. 



EXPLANATION OF PLATE XIV. 

 Sminthurus minnesotensis n. sp. 

 Dorsal and lateral views 



Figures made by Charlotte M. King. 



