The paper is of advisory character and is intended for biologists engaged in teaching. Directions are given for the search, in their natural habitats, for suitable specimens of invertebrate animals, their culture in ...

In Part I the author discusses the importance of studies on the annual rhythm in amphibians from the point of view of General Biology, and the main difficulties in the carrying out of investigations. These investigations ...

1. Researches were carried out in 1962—1965 in the Niepołomice Woods (latitude 50°00 N, longitude 20°20’ E) at Staniątki (forest) and Szarów (peaty meadow). 582 sexually mature female marsh frogs (Rana arvalis arvalis ...

The article discusses the role and significance of pests in food products, with special attention to granary pests. There is a preliminary discussion of the damage caused by pests belonging to diffedent animal groups, ...

Thirty male white mice (Mus musculus L.) were used for the experiments. To determine the average norm of the morphotic elements of the blood, control examinations were carried out on ten individuals. The changes occurring ...

A discription is given of the position of the dorsal-marginal glands (sub-marginal tubercles) in larvae in the second stage and females of the Brown Scale Insect (Lecanium corni Bouché). There are usually five pairs of ...

A description is given of the migration and further fate of Leydig’s cells in studies on the course of regeneration of the hind limb of the axolotl during 10 months. Five developmental stages of Leydig’s cells were ...

The author describes one of the most interesting groups of insects, the Coccoidea, drawing attention to their biological and morphological characteristics and to their significance in human economy, and giving directions ...

The Silesian Beskid represent a considerable mountain area (about 500 sq. km) in the western part of the Western Carpathians. This territory extends from the Olza river valley in the west to the Żywiec Basin in the ...