Descriptions of New Genera and Species of Mymaridae (Hymenoptera:Chalcidoidea). A.A. Ogloblin pages 277-298

Flora of Alaska and Adjacent Parts of Canada. J.P. Anderson pages 297-348

Fruit Key to the Umbelliferae in Iowa, With Plant Distribution Records. Margaret R. Murley pages 349-364

Structure, Properties, and Preparation of Certain Bast Fibers. Harriette Brita Hanson pages 365-384

Abstracts of Doctoral Theses. pages 1-52

Preliminary Studies on Starvation of First Instar European Corn Borer Larvae (Pyrausta nubilalis). Oscar E. Tauber and Willis N. Bruce pages 53-56

The Fishes of Cedar Lake, Iowa. Reeve M. Bailey and Harry M. Harrison Jr, pages 57-78

A Monograph of the Genus Corythaica Stal. Margaret Poor Hurd pages 79-100

Realtion of Vegetative Cover to the Plant Growth Conditions of Eroded Soils. Robert M. Warner pages 101-154

The Separation of Copper from Tin by Electrodeposition with Graded Cathode Potention Control. The Direct Determination of Copper in Bronze. Harvey Diehl and Richard Bronus pages 155-170

The Biology of Cynaeus angustus Lec., A New Stored Grain Post. Jack Louis Krall and George C. Decker pages 385-402

A Combined Field and Laboratory Process for the Estimation of Plasma Atabrine Levels in Field Troops from Single Samples of Urine. Elery R. Becker, John, A. Carter, Craighill S. Burks, and Edwin Kaleita pages 403-422

A Disease of Corn in the Rio Grande Valley of Texas. B.S. Pickett, G.H. Godfrey, G.E. Altstatt, I.E. Melhus, and J.R. Wallin pages 423-428

Generic Classification of North American Tingoidea (Hemiptera Heteroptera). Margaret Poor Hurd pages 429-489

Parasitism of Xanthomonas translucens (J.J. and R.) Dowson Grasses and Cereals. Jack R. Wallin pages 171-194

Effect of Pennsylvanian Sediments on the Properties of a Gray-Brown Podzolic Soil Of Iowa. J.B. Peterson pages 195-212

Flora of Alaska and Adjacent Parts of Canada. J.P. Anderson pages 213-258

Some Factors in the Production and Germination of Spores of Diplodia Zeae in Culture. G.C. Kent pages 259-264

The Inhibition by Cysteine and Glycine of the Deterioration of Dried Egg White. Ralph W. Kline and Sidney W. Fox pages 265-268

Notes on Some Variations in Field Bindweed (Convovulvus arvensis L.). E.O. Brown pages 269-276