376 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



This destructive borer was, in 1884, still at work in Maine, where we 

 have made such observations on its egg-laying habits and the mode of 



Fig. 138.— Mine of Olycobius speciosits, one-third natural size. 



life of the freshly- hatched larva, that it now seems possible to prevent its 

 entry into the heart-wood by cutting it out of the barli in the autumn. 



