macartneyi as in:
• the somewhat debated Bornean/Crested Fireback ssp. Lophura ignita macartneyi TEMMINCK 1813, as "Gallus Macartneyi (here, all in French):
|... á Lord Macartney Ambassadeur Anglais auprès l’Empereur de la Chine, lors de son séjour à Batavia. ...|
And does it say anything additional of what he'd done, why he was given this mark of honour?
PS. For more info on the twists and turns of this tricky taxon, see the Paper; Lophura ignita macartneyi revisited, by Collar & Prys-Jones, in Forktail 30: pp.135-138 (2014), here. But, hold on to your hats, its history includes interbreeding of both species and subspecies, clines, forms and hybrids.
For even more of the history behind it see Büttikofer's Paper; On Phasianus ignitus and its nearest allies, from 1896 (here).