Dr. Steinmann Henrik szerk.: Folia Entomologica Hungarica 23/1-12. (Budapest, 1970)

eyes to the different size of the insects. The richest collection was estimated to contain about 100,000 specimens of minute and small insects. The introduction of a size selection is intended to help overcome this difficulty. The material is sorted into 5 size-groups by gently sifting small quantities through a set of sieves. The size of sieves applied was 10, 20, 30 and 40 cross-thread, respectively, per 1 in (2.5 cm). The three smallest size-groups can be selected under a microscope. If cautiously done, the sifting does not affect the condition of the material; Strepsiptera, Ephemeroptera, Trichoptera etc can be picked out in perfect condition. However,it is advisable to select the moths and large Coleoptera before sifting. Suction trap collections: The suction trap is recommended and used for population dynamics counts of small insects. The type used was the JohnsonTaylor (Rickmansworth, Herts.) 9 in. product. In our experiments, the condition of the majority of insects, when trapped straight into ethanol, was perfect. The trap was used successfully for faunistical collections if set up in the foliage of flowering or moribund trees, or for the flying components of soil fauna, if the ground was turned or hoed around the working trap. Rearing: Por rearing, jars with cloth over the mouth, small cages or, if the stuff was practically dry, polythene bags have been used. On one occasion the rearing from a complete shea butter tree (Butyrospermum parkii), coll. no. 167, have been carried out in a small room. Killing and preservation The killing agent was different according to the requirements of the different insect groups. The killing agent for Coleopte-