Resin bees of genus Megachile, subgenera Callomegachile and Carinula (Hymenoptera, Megachilidae) from Thailand with description of a new species Author Chatthanabun, Nontawat Center of Excellence in Entomology and Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand Author Ascher, John S. Insect Diversity Lab, Department of Biological Sciences, National University of Singapore, 16 Science Drive 4 S 3 Level 4, 117558, Singapore Author Pinkaew, Nantasak Department of Entomology, Faculty of Agriculture at Kamphaengsaen, Kasetsart University, Kamphaengsaen Campus, Nakhon Pathom, 73140, Thailand Author Thanoosing, Chawatat Department of Life Sciences, The Natural History Museum, Cromwell Road, London SW 7 5 BD, UK & Department of Life Sciences, Imperial College London, South Kensington Campus, Exhibition Road, London SW 7 2 AZ, UK Author Traiyasut, Prapun Program in Biology, Faculty of Science, Ubon Ratchathani Rajabhat University, Ubon Ratchathani, 34000, Thailand Author Warrit, Natapot Center of Excellence in Entomology and Department of Biology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand ich108@hotmail.com text ZooKeys 2020 997 95 144 http://dx.doi.org/10.3897/zookeys.997.34935 journal article http://dx.doi.org/10.3897/zookeys.997.34935 1313-2970-997-95 52E31975D30F4F93BBA3AB628D381281 55136D8014F356BAAB0129717E021D48 Megachile (Callomegachile) monticola Smith, 1853 Figs 15 , 16 Megachile monticola Smith, 1853: 179. Female syntype (NHMUK, examined). Megachile felderi Radoszkowski, 1882: 79. Megachile rhinoceros Mocsary , 1892: 131. Megachile samson Cameron, 1897: 128. Megachile koshunensis Strand, 1913: 60. Chalicodoma (Eumegachilana) monticola : Michener, 1965: 192. Diagnosis. Female can be recognized by its black large body size (20-26 mm); mesosoma and T1 covered with fulvous hairs (Fig. 16a ); base of clypeus with large protruding tubercle (Fig. 16b ); mandibles elongate with three teeth and small tubercle at base; labrum oblong with lateral impression (Fig. 16c ); black scopa. Figure 15. Thai distribution of Megachile (Callomegachile) monticola . Figure 16. Megachile (Callomegachile) monticola Smith, 1853, female a lateral view b protruding tubercle at base of clypeus (arrow) c frontal view of mandible and labrum d dorsal view of metasoma e spine at apical tibia f lateral view of metasoma and scopa. Literature records. Bangladesh. Sylhet ( Smith 1853 ; Bingham 1897 ); China. Anhui, Fujian, Shanghai ( Smith 1853 ); Hong Kong.; India. Assam, Sikkim ( Bingham 1897 ); Indonesia. Lombien Island ( Ascher and Pickering 2020 ); Japan. Okinawa, Uragami ( Ascher and Pickering 2020 ); Myanmar. Tenasserim ( Bingham 1897 ); Taiwan. Taihoku-shu ( Ascher and Pickering 2020 ); Vietnam. Thua Thien-Hue ( Ascher and Pickering 2020 ). Also reported from Chiang Mai Province on iNaturalist (credit: entomokot 2019). Material examined. Female syntype. "Type; B.M. TYPE HYM. 17. a. 2155; Sylhet, 4[?]7 51; Megachile monticola , TYPE, Sm.; monticola Type Sm.; NHMUK 013379845"; Thailand. Chiang Mai Province: 1♀, Mueang district, Chang Phuag subdistrict, Nong Hoe, 17-VII-1996, coll. Adul (leg. NC and NW); 1♀, longan plantation, 10-II-2009, coll. Paveenun (leg. NC and NW); 1♀, 20-IX-1985, coll. Sumrid (leg. NC and NW). Chiang Rai Province: 1♀, Mae Chan district, Mae Chan subdistrict, 14-VIII-1960, coll. unknown (leg. NC and NW).