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No. 905. North Hwanghae Province, Unpa, 1 August, 1982. - Plankton sample taken from a pond densely vegetated with Nelumbo nucifera, in Kanandi. No. 906. North Hwanghae Province, Hwangju, 1 August, 1982. - Plankton sample collected from an unnamed pond near Hwangju. No. 907. Same locality and data. - Plankton sample taken from rice field canal about 5 km N of Hwangju. No. 908. Pyongyang City: Pyongyang, Hotel Pyongyang, 2 August 1982. - Plankton sample taken from a fountain in the garden of the hotel. REFERENCES DELY, O.Gy. and Á. DELY-DRASKOVITS (1978): Zoological collectings by the Hungarian Natural History Museum in Korea. 28. A report on the collecting of the Fourth Expedition. - Folia ent.hung., .31(1): 5-9. FORRÓ, L. and Gy. TOPÁL (1981): Zoological collectings by the Hungarian Natural History Museum in Korea. 62. A report on the collecting of the Seventh Expedition. - Folia ent.hung., 34(2): 7-13. MAHUNKA, S. and H. STEINMANN (1971): Zoological collectings by the Hungarian Natural History Museum in Korea. 1. A report on the collecting of the First Expedition. - Folia ent. hung., 24(4): 21-46. PAPP, J. and S. HORVATOVICH (1972): Zoological collectings by the Hungarian Natural History Museum in Korea. 2. A report on the collecting of the Second Expedition. - Folia ent. hung., .25(1): 187-227. PAPP, J. and A. VOJNITS (1976): Zoological collectings by the Hungarian Natural History Museum in Korea. 21. A report on the collecting of the Third Expedition. - Folia ent. hung., 29(1): 59-74. STEINMANN, H. and T. VÁSÁRHELYI (1980): Zoological collectings by the Hungarian Natural History Museum in Korea. 51. A report on the collecting of the Sixth Expedition. - Folia ent.hung., 33(1): 155-160. VOJNITS, A. and L.' ZOMBORI (1979): Zoological collectings by the Hungarian Natural History Museum in Korea. 47. A report on the collecting of the Fifth Expedition. - Folia ent.hung., 32(2): 207-217. Authors' address: Dr. L. FORRÓ and Dr. L. RONKAY Zoological Department Hungarian Natural History Museum H-1088 Budapest Baross u. 13. HUNGARY