Based on analyzing 415 individuals of bees and wasps sampled during 7 surveys from 2011 to 2012 in two locations within agricultural and rural-urban areas adjacent to Hanoi city, the authors noticed that species number and abundance of several bees and wasps are considerably changed according to the degree of urbanization and environmental changes. Of the total 35 species bees and wasps surveyed in the agricultural land without urbanization process in the vicinity of Hanoi city, there were 16 and 25 bees and wasps species observed in habitats alongside newty build roads and adjacent building sites, respectively. During the sampling period, a number of specimens of 31 bee and wasp species was high observed in the isolated agricultural land whereas there were only 2 species recorded as abundant in habitats ilngside newly build roads and adjacent building sites. There are 4 bee and wasp species in the agricultural land recorded as rare meanwhile 8 and 9 species were rarely occurred, 7 and 6 species were very rare in habitats alongside newly build roads and adjacent building sites, respectively. In the vicinity of Hanoi city, the fast urbanization could cause a considerable influence on parasitoid wrasp species as Cotesia rufictus, Therophilus javanus, Xanthopimpla puncata and bees as Amegilla albigena, Eucera chinensis, Xylocopa tranquebararorum and X. tumida, all those species are frequently observed in the agricultural land of Hanoi area.
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