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1 Danforth BN, "The impact of molecular data on our understanding of bee phylogeny and evolution" 58 : 57-78, 2013
2 Proshchalykin MY, "The genus Nomada(Hymenoptera : Apidae)in Siberia" 49 : 985-1006, 2017
3 Bingham CT, "The fauna of British India, including Ceylon and Burma, vol. I" Taylor and Francis 1897
4 Williams PH, "The bumblebees of the Nepal Himalaya (Hymenoptera: Apidae). Insecta matsumurana" 66 : 115-151, 2010
5 Tadauchi O, "The Genus Andrena Collected from Nepal (Hymenoptera, Andrenidae) with Redescriptions of Some Types of Andrena Described from North India" 47 : 1-20, 2007
6 Michener CD, "The Bees of the World" Johns Hopkins University Press 2007
7 Saini J, "Taxonomy of the bee genus Amegilla Friese(Apoidea, Apidae : Anthophorini)with eight species first recorded from Rajasthan, India with a dichotomous key and a complete distribution record" 30 : 567-572, 2016
8 Kumari P, "Taxonomical and behavioural studies on Megachile conjuncta(Fabricius)(Hymenoptera : Megachilidae : Cressoniella)" 6 : 2198-2201, 2018
9 Shiokawa M., "Synopsis of the bee genus Ceratina(Insecta : Hymenoptera : Apidae)in Nepal, with descriptions of five new species and one new subspecies" 13 : 201-220, 2008
10 Ngat TT, "Studies of the Genus Thyreus Panzer(Hymenoptera : Apidae : Apinae)with Six New Records from Vietnam" 9 : 227-236, 2017
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