S. Mahunka szerk.: Folia Entomologica Hungarica 48. (Budapest, 1987)

FOLIA ENTOMOLOGICA HUNGARICA ROVARTANI KÖZLEMÉNYEK XLVIII 1987 p. 265-269 Report on a collecting trip to Vietnam in 1986 By F. MÉSZÁROS, J. OLÁH and T. VÁSÁRHELYI (Received February 1, 1987) Abstract: Report on a collecting trip to Vietnam in 1986. - Collecting data of a trip to the Northern part of Vietnam in October, 1986 are given. In the framework of an agreement between the Hungarian Academy of Sciences and the National Center for Scientific Research of Vietnam (see also MAHUNKA and OLÁH 1986), we collected in the Northern part of Vietnam between 7 and 30 October, 1986. Below we give a short description of the collecting methods, the localities and a list of different collecting units. Authors according to their field of interest employed different collecting methods. F. MÉSZÁROS made most of the mammal trapping and conserved the vertebrates for subsequent parasitological investigations. J. OLÁH performed collectings mostly by netting the various vegetations along all kinds of water (lakes, rivers, streams, tributaries, springs). T. VÁSÁRHELYI made collectings mostly from water and water-surface with water-nets and from under bark, from decaying debris, etc. Singling, as well as lamping with a Honda generator and 250 W mercury vapour bulb and, where it was possible, also with a 160 W blended light lamp were performed by all of us. Five localities, where a larger amount of material was collected, are worthy of mention here, otherwise, we tried to catch anything whatever offered itself. 1. Hanoi City, Ho Tay (West Lake) - Here we could work in the garden of a recreation center, on the shore of the lake. The ruderal vegetation comprised high grass with herbaceous vegetation, here and there with shrubs and some trees and the inevitable lotus and' waterhyacinth emerging from larger surfaces of the water. 2. Tarn Dao (Vinh Phu Province) - A small village situated at about 1200 m above sea level in the mountains. All around there are (secondary) subtropical rain forests. The main stream running towards a deep, beautiful waterfall, is fed by several smaller tributaries, also by springs. The spring-brook of the main stream is shaded by the forest. The stream-bed is stony, often with rapid sections and with more quiet reaches where submerse vegetation finds ample place to grow. This is an excursion center. The forest and the less visited parts of the village seemed to be free of small mammals (we saw only rats around and in the houses). All the wooden matter was removed from the forest, so most of the subcortical material was collected in yards within the village by the most helpful assistance of the inhabitants. We also collected at the foot of the mountain along the 2-3 m wide main stream and its side-streams and in a small secondary forest. Hungarian zoological studies in Vietnam. No. 2.