284 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 
are exempt from their burrows, having them either at the lower part or 
else at the large fork or top. I have seen enormous trees in full leaf 
and blossom, in a still day, suddenly break off midway of trunk, fall to 
the earth with a crash, startling and mysterious enough to any hearer 
in such a day of reigning quiet. Where the fracture most often occurs 
no decay of the heart is present, but it is completely filled with the 
burrows of the Osmoderma? 
Alaus oculatus (Linn.) 
Stenoscelis brevis (Boh.) (Chittenden in letter.) 
Phlceophagus minor (Horn.) (Chittenden in letter.) 
