Heads of three Asian barbets: <i>Cyanops davisoni</i> = <i>Megalaima asiatica davisoni</i> <b>Blue-throated Barbet</b> ssp. (top); <i>Cyanops ramsayi</i> = <i>Megalaima franklinii ramsayi</i> <b>Golden-throated Barbet</b> ssp.(middle); and <i>Cyanops incognita</i> = <i>Megalaima incognita</i> <b>Moustached Barbet</b> (bottom)
<bdi><a href="https://en.wikipedia.org/wiki/en:John_Gerrard_Keulemans" class="extiw" title="w:en:John Gerrard Keulemans"><span title="Dutch bird artist (1842-1912)">John Gerrard Keulemans</span></a>
</bdi>
1891
Catalogue of the Birds in the British Museum. Volume 19