Vol. 5, p. 349-355 January 31, 1931. 



Occasional Papers 



OF THE 



Boston Society of Natural History. 



DISTRIBUTION OF NEW ENGLAND WOOD LICE. 



(on isopoda oniscoida, third paper.) 



BY CHARLES H. BLAKE. 



The records in the literature pertaining to the Oniscoida of 

 New England are so few as to be of little assistance in determining 

 their real distribution. My collecting trips of the past two years 

 have resulted in a considerable number of records which add 

 materially to our knowledge. 



In addition to the more specific distributions indicated under 

 the various species, it is now possible to draw some general 

 conclusions. First, no wood lice are found in the White Mountain 

 area above an altitude of 650-700 feet. Similar lacunae have not 

 yet revealed themselves in the Green Mountains and the Berk- 

 shires but my collecting in the latter regions has not been so 

 detailed: Second, there is a well-defined halophilous group, the 

 Scyphacidae and Miktoniscus. Third, a few forms are coastal or 

 southern in distribution, for example, Armadillidium vulgare. 



I am very grateful to Mr. William Procter, Director of the 

 Biological Survey of the Mount Desert Region, for his permission 

 to include, from the records of the Survey, the species from 

 Mount Desert Island, Jonesport, and Beals Island, Me. Thanks 

 are also due to Mr. S. N. F. Sanford of the Boston Society of 

 Natural History for enabling me to examine all the material of 

 this group in the collection of the Society. 



Family LIGYDIDAE. 



Ligyda Rafinesque. 



Ligyda oceanica (Linn6). 



This species I have not taken personally. The only record is 

 Newport, R. I. (Harger 1880, p. 310). I have, however, seen a 

 cast skin on the rocks at East Gloucester, Mass. It is, of course, 

 halopetrophilous. 



349 



