The special point that I wish to bring before the Society relates to a case of the common larch being made use of by Hylesinus piniperda for purposes of oviposition. As occasion demands, this insect has been found to utilise as a breeding-place every species of Pinus, but, so far in Europe or North America, no case has been noted of any trees belonging to the genus Larix having been similarly attacked. In Asia an observer, namely, Middendorff, has recorded one case which came under his notice in the district of the Boganida, in Siberia, in 71° north latitude (Sibirische Reisen, Band iv. Theil i. p. 603).