The stingless bees are restricted to the tropical regions of the world and are considered as important pollinators of various wild and cultivated plants. In the recent investigation, fourteen species of stingless bees are recognized in the dry season from Cambodia and Laos, which are congeners to the species from adjoining country Thailand. In this study, four species in each country Cambodia and Laos are found for the first time: Lisotrigona cacciae (Nurse, 1907), Pariotrigona pendleburyi (Schwarz, 1939), Tetragonula sirindhornae (Michener and Boongird, 2004) and Tetrigona melanoleuca (Cockerell, 1929) from Cambodia, and Homotrigona anamitica (Friese, 1909), Lepidotrigona flavibasis (Cockerell, 1929), Lisotrigona furva Engel, 2000 and Tetragonula fuscobalteata (Cameron, 1908) from Laos. Morphological images, identifying key to genus and species, discussion on the various types of nest and biology for each species are provided.

• Ram Keshari Duwal(Insect Biosystematics Laboratory, Seoul National University, Korea, Department of Agricultural Biotechnology, Seoul National University, Korea)
• Seunghwan Lee(Insect Biosystematics Laboratory, Seoul National University, Korea, Department of Agricultural Biotechnology, Seoul National University, Korea)