448 BIOLOGICAL SURVEY OF 



Class ARACHNIDA 



I\[any of the following were collected by Dr, Charles H. 

 Blake alone and also with the author. 



Order CHELONETHIDA (Pseudoscorpiones) 

 (False or Book Scorpions) 



Group HETEROSPHYBONIDA 



Suborder HETEROSPHYBONIDA 



Chthonioidea 



Chthoniidae 



Chthonius C. L. Koch 



C. TETEACHELATUs (Prevssler). One specimen under a stone 

 on Bar Island, August 15, 1931. 



Group HOMOSPHYBONIDA 



Suborder MONOSPHYRONIDA 



Cheliferoidea 

 Chernetidae 



Chelanops Nicolet 



C. SANBORNi (Hagen). Under stones and logs, in damp places. 

 Shore of Lake Wood, Duck Brook Path, Salisbury Cove and 

 Corfield. Our most common species. 



Cheliferidae 



Chelifer Geoff roy de St. Hilaire 



C. cancroides (Linne). One specimen taken in a house, August 

 10, 1931. 



