A review of the genus Ogdoconta Butler (Lepidoptera, Noctuidae, Condicinae, Condicini) from North America north of Mexico with descriptions of three new species.

The species of the genus Ogdoconta Butler, 1891 (Lepidoptera, Noctuidae, Condicinae, Condicini) from North America north of Mexico are reviewed, and a description of the genus is given. Ogdoconta satana Metzler, Knudson & Poole, sp. n.

An autoregressive model of population density change in an experimental population of Daphnia magna.

The usefulness of autoregression equations as empirical models of population change in an experimental population of Daphnia magna was studied. A two-term and a ten-term autoregression equation were fit to the data. Tests of the significance of the terms of the ten-term equation were carried out, and the fit of the second-order autoregression tested.