Morphnarchus princeps (Sclater, PL, 1865) (1 Viewer)

[Taphrospilus]

Morphnarchus princeps (Sclater, PL, 1865) OD here

...this evening a specimen of a very fine and well-marked species of Accipitrine bird, ...

The Eponym Dictionary of Birds claims:

Prince's Hawk Leucopternis princeps P. L. Sclater, 1865 [Alt. Barred Hawk]
This is not named after a specific person but rather as 'the prince of birds'.

The Key to Scientific Names

L. princeps, principis prince, chief, leader < primus foremost < super. prior, prius first; capere to take.

If Chief, Prince or Leader may everyone decide himself.

But the bird in relationship with an old acquaintance not completely solved.

arcaei as in:
● the Blue-and-gold Tanager (Buthraupis) Bangsia arcaei SCLATER & SALVIN 1869 (here, and Plate here) as "Buthraupis arcæi":

In my MS (and notes) I only have him as a local, Guatemalan collector (trained by Salvin), who moved to Western Panama in the 1860's, where lived in the Province Chiriquí and also collected in Veraguas ... until at least 1870, when he collected the Type of the Chiriqui Yellowthroat Geothlypis chiriquensis SALVIN 1872. But after that he simply vanished ... at least out of my view?

However; here he is mentioned by Salvin (in 1878) as "our late collector, Enrique Arcé, ..."

Which is why I´m in some doubt of the "fl." (flourished/still alive) part in today's Key:

Anyone who know more on this guy?