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Phnom Kulen is a small and low plateau in the northern Cambodia still partly covered with evergreen forests and isolated from similar habitats by the Cambodian Lowland at least for 60 km. A preliminary checklist of its Odonata is provided, including 97 species. Burmagomphus sp. cf. willamsoni and Macromia callisto are for the first time reported for Cambodia.
Prey Long (Prey Lang) Forest is the largest remaining lowland rainforest in Indochina, shared by Stung Treng, Preah Vihear, Kampong Thom and Kratie Provinces of Cambodia, which has been persisted until present because of the lack of roads. It includes patches of unique evergreen swamp forests. Odonata of Prey Long forest, including Cheum Takong forest swamp, was briefly examined in December 2019, while the already deforested area was examined in June 2018. The former examination resulted in 40 species, the latter in 34 species, 60 species in total. Two species, Copera chantaburii Asahina, 1984 and Burmagomphus williamsoni Förster, 1914, are for the first time reported for Cambodia from the deforested area (Chey Saen District of Preah Vihear Province). The swamped forest of Cheum Takong provided 17 species, 5 of which were not found elsewhere in the considered area, 3 are rare and 4 generally Sondaic. Prey Long Forest should be re-examined in the rainy season soon after the road to Spong village is constructed.
An annotated list of twenty species of rarely collected and little known bees of the genus Sphecodes Latreille, 1804 (Hymenoptera: Apoidea: Halictidae) from the Himalayas is given. Sphecodes bluethgeni sp. nov. is described from Bhutan. Three species are newly recorded from the Himalayas: S. binghami Blüthgen, 1924, S. kershawi Perkins, 1921 and S. laticeps Meyer, 1920. Based on type specimens, new synonymies have been proposed for Sphecodes cameronii (Bingham, 1897) = S. armeniacus Warncke, 1992 syn. nov.; S. gibbus (Linnaeus, 1758) = S. indicus Bingham, 1898 syn. nov.; and S. invidus (Cameron, 1897) = S. nigrobasalis Meyer, 1922 syn. nov. A lectotype is designated for Sphecodes sikkimensis Blüthgen, 1927. Illustrated keys to males and females of all species known from the Himalayas and an updated checklist of the 26 Himalayan species of Sphecodes are provided. Additionally, one new species from neighboring Uttar Pradesh (India), Sphecodes uttaricus sp. nov., is here described as new and included due to its close relationship to the Himalayan S. sikkimensis Blüthgen, 1927.