306 
Psyche 
[December 
and none were found on any date around a nearby beaver house in a 
drier situation. The beetles occurred beneath embedded logs and 
under loose bark of old stumps, sometimes several inches beneath the 
surface of the extremely wet soil which was exposed to the sun and 
which contained much organic matter and debris. Numerous scarce 
or local Carabidae that occur in the same general habitat are Elaphrus 
olivaceus LeConte, Bembidion versutum LeConte, and Agonum 
cincticolle (Say). We noted other beetles there that bore the mite 
Protodinychus : Leptinellus validus (Horn), Agonum melanarium 
(Dejean), and Quedius sp. (those specimens were found around the 
beaver house only). 
Literature Cited 
Bell, R. T. and J. R. Bell 
1964. Platypatrobus lacustris Darlington in Vermont. Proc. Ent. Soc. 
Wash. 66 : 100. 
Darlington, P. J. 
1938. The American Patrobini. Ent. Amer. 18: 135-183. 
Lindroth, C. H. 
1962. The Male of Platypatrobus lacustris Darlington. Psyche 69: 
7-10. 
Robert, A. 
1963. Une premiere station du Platypatrobus lacustris Darlington dans 
le Quebec. Ann. Soc. Ent. Quebec 8: 58-59. 
