High Molecular Weight Fatty Acid Dervatives. II. Sulfides, Sulfoxides, and Sulfones. Byron A. Hunter pages 215-222

High Molecular Weight Fatty Acid Derivatives. III. Carboxylic acid Salts and Amides of n-Dodecylamine and n-Octadecylamine. Byron A. Hunter pages 23-230

Lasius (Acanthomyops) plumopilosus, a New Ant With Plumose Hairs from Iowa. William F. Buren pages 231-236

Concerning Some Halobatnids from the Western Hemisphere. (Hemip. Gerridae). C.J. Drake and H.M. Harris pages 237-240

Some New Species of Miridae (Hemiptera) from China. Tsai-Yu Hsaio pages 241-252

The Determination of Uronic Groups in Soils and Plant Materials . W.V. Bartholomew and A.G. Norman pages 253-260

The Dissimilation of Glucose by Chaetomium funicola Cke. I. Glucose Carbon Partition. G. Semeniuk pages 261-268

New Species of Lygus from the Western United States (Hemiptera Miridae). Harry H. Knight pages 269-274

Notes on the Family Mesoveliidae (Hemiptera) with Descriptions of Two New Species. H.M. Harris and C.J. Drake pages 275-278

Methods and Computation in Fecal Analysis With Reference to the Red Fox. Thos. G. Scott pages 279-286

The Use of Iowa Clays for the Clarification of Sorgo Sirup. W.G. Gaessler, J. David Reid, and F. Leicester Cuthbert pages 287-300

The Fructosan Content of Some Grasses Adapted to Iowa (A Preliminary Survey). A.G. Norman, Cp> Wilsie, and W.G. Gaessler pages 301-306

Studies on the Myxobacteria. J.M. Beebe pages 307-338

Note on the Utilization of Carbon Dioxide by Heterotrophic Bacteria. H.D Slade, H.G. Wood, A.O. Nier, A. Hemingway, and C.H. Werkman pages 339-342

A New Genus and Species of Anthocoridae (Hemiptera). H.M. Harris and C.J. Drake pages 343-348