Year 1974, No. 2 (March - April)

Novikov В. G., Rudneva L. М. Mechanisms of Seasonal Cyclicity of Birds' Reproduction. Communication I. Hypothalamic Control of Gonad Development and Function

Voinstvensky M. A., Petrusenko A. A. Program of Biogeocenological Investigations of the Main Steppe Landscapes in the Ukraine

Kazakov B. A. Distribution and Taxonomic Status of Lusciniola melanopogon Temm. in the European Section of the USSR

Sagitov A. K., Sharipov M. A. Data on Lanius minor G m. Ecology under Conditions of Towns in the Ferghana Valley

Tumanov I. L., Levin V. G. Age and Seasonal Changes in Some Physiological Indices of Mustela nivalis L. and Mustela erminea L.

Lyubomudrov A. P., Lychkovsky L. M. Angioarchitectonics of Eye in the Terrestrial Vertebrates

Korotkevich E. L. A New Species of Aceratherium from Early Sarmatian of the Ukraine

Shcherbukha A. Ya. On Study of Morphological Variability in Esox lucius L. from Some Ukrainian Rivers

Blinova S. L., Gurando E. V. Parasitorhabditis fuchsi sp. n. (Nematoda, Rhabditidae)—a Parasite of Blastophagus minor Hartig

Stadnichenko A. P. On Characteristics of Freshwater Gastropoda Infestation with Larval Forms of Trematodes

Kolybin V. A., Kireeva I. M., Zelinskaya L. M. Biological Bases of Dynamics in Number of Porthetria dispar L. Communication I. Fecundity

Martynova E. F., Chelnokov V. G., Rasulova Z. K. Species of the Genus Heteromurus Wankel, 1860 (Collembola, Entomobryidae, s. l.) in the USSR Fauna

Shevchenko A. K. Biting Midges (Diptera, Ceratopogonidae and Leptoconopidae) from the Crimea

Procedures

Krapivny A. P., Kharchenko L. P. Efimov V. I. A Device for Registratation of Birds' Behaviour in the Nesting Period

Brief Notes

Ilienko E. P. On the Problem of Erithacus rubecula L. Orientation

Gaichenko V. A. Chromosome Set in Cricetulus migratorius Pall., 1770 from the Ukraine

Maximova V. I. Effect of Air Temperature on Development of Quadraspidiotus perniciosus Comst

Men of Science

Tatarinov K. A. Aleksandr Porfirievich Korneev

Kryzhanovsky O. L. In Memory of Aleksandr Grigorievich Sharov (1922—1973)

Criticism and Bibliography

Logachev E. D. Review on Book by L. Sh. Davitashvili «Teaching on Evolutionary Progress (The Theory of Aromorphosis)»

Tatarinov K. A. Review on Book by I. G. Pidoplichko, L T. Sokur «The Man and Biosphere»

Information and New Items

Boshko G. V., Gushcha G. I., Kornyushin V. V. The XI Conference on the Problems of Parasitology