Arthrochlamys bebbianae Brown is a small chrysomelid that occurs rather commonly in the Ottawa District. It is one of a group of species that have been confused under the names Chlamys gibbosa (Fab.) and C. plicata (Fab.). Both its larvae, which are case-bearers, and its adults feed on the leaves and on the epidermis of the new growth of a willow, Salix Bebbiana Sarg. The speries appears to be monophagous, and it tends to occur in diffuse colonies.

As our knowledge of the larvae increases, the fundamental differences between Agriotes Eschscholtz and Dalopius Eschscholtz become more apparent. However, the larval characters hitherto used to separate the genera are now known to be quite inadequate.

The following statement concerning dichloro-diphenyl-trichlorethane, or 2, 2-bis (parachlorophenyl)-1,1,1-trichloroethane, more conveniently referred to as DDT, has been prepared in view of the widespread interest among entomologists in this product and in its pest control possibilities. It is based on information obtained from various sources.