Dec, 1917 Bulletin of the Brooklyn Entomological Society 109 



evidence of having been torn up by the winter flood which this 

 year was the heaviest in over forty years. There were no leaves 

 attached and its size showed it to be one of the older trees, the 

 leaves of which were burned off by the Indians. 



On getting my ten feet of log home I at once constructed two 

 stout cages for their reception and then came a long wait. Every 

 morning on arising since March when the sections of log were 

 brought home, my first duty has been to inspect the cages. Not 

 until August 3 was there any change and then my long watch 

 was rewarded by my first sight of a living Dinapate. A fine pair, 

 lady and gent, had emerged during the night and were vainly 

 trying to conceal their huge bulks ostrich-wise by shoving their 

 heads into any dark corner. Since then until the present date, 

 September 17, thirty-one of these beetles have emerged, generally 

 one at a time, but one morning there were four and several times 

 two came together. At first the sexes were quite evenly repre- 

 sented but during the last two weeks only females have emerged. 



All of these emergences took place after dark in the early part 

 of the night not later than 9 P. M. Several times I tried to see 

 the beetles come out by the aid of a lantern, but the presence of a 

 light caused them to cease operations at once. One evening, 

 however, I was able to watch this process by setting the lantern 

 four feet away ; the light was dim but sufficient for observation 

 by close attention. When first observed this beetle had cut 

 through the outer surface and had made a hole about one fourth 

 inch in diameter. This hole he continued to enlarge with his 

 powerful mandibles turning continuously from right to left as 

 he bit away at the circumference. After about half an hour of 

 this circular gnawing he tried the hole, starting out venter down, 

 but as he could not get his thorax through he retreated and took 

 several bites, evidently with an exact knowledge of the spots that 

 bound. He then tried his work and finding it to his hking backed 

 in again and after a short rest turned belly up and came out 

 headed up the log, which he at once ascended to the top. On 

 coming out these beetles are hardened and fully colored and had 

 evidently spent some time in the pupal chamber in the adult con- 

 dition. They at once begin trying to fly and spend their strength 

 against the wire netting of the cage, the sexes paying no attention 



