HYDROPHILIDAE SILPHIDAE. 



19 



1 Sphaeridium pallidum, laeve, and unistriatum Beauv. cannot be identified by the figures ssnd 

 descriptions: the first two, according to Chfvrolat, are Camptodes. If tiiis deteriuinatiou be cor- 

 rect, they are not found within our territories. 



