Chemistry. The Temperate Coefficient of the Decomposition of N-chloracetanilide. By R. A. Robinson and G. M. Smith 41 Entomology. Mosquito Life in the Auckland District. By David H. Graham. 210 Occurrence of Dasypodia selenophora in Southland. By J. H. Sorensen. 225 Additions to New Zealand Rhyacophilidae. Part 1. By A. G. McFablane. 330 Carposina adreptella. By F. J. Jeffreys. 341 Hexatricha pulverulenta Westwood. By F. J. Jeffreys. 347 The Validity of the Coccid Genus Eulecanium Cockerell. By G. Brittin 410 The Life History of Lecanium (Eulecanium) persicae (Fabricius), and Descriptions of the Different Instars. By G. Brittin 413 The Carabidae (Coleopteia) of New Zealand (Part 1. Pterostichini). By Everard B. Britton 473 Geology. Mineralogical Notes from the University of Otago, New Zealand—No. 2. By W. N. Benson and F. J. Tritton 56 The Bob's Cove Tertiary Beds and the Moonlight Thrust-Fault. By C. O. Hutton 73 Variation of Gravity within the Earth. By K. E. Bullen. 188 Mineralogical Notes from the University of Otago, N.Z. No. 3—Kaersutite and Other Brown Amphiboles in the Cainozoic Igneous Rocks of the Dunedin District. By W. N. Benson. 283 The Makara and Karori Valleys and Their Bearing Upon the Physiographic History of Wellington. By M. Gage 401