I'l.ATI XLIX. 



Inner suiface of pieces of J'iiins o^crardiaita bark sliow ing the egg and lar\al galleries of 

 Po/vi^rap/nis troicht, Steb. In the larger piece uncompleted egg-galleries are shown with only 

 the first beginnings of the horizontal larval galleries. North Zholj. Ikilucliistan. June 1905. 



