Proper citation for Hewitson's "Illustrations of New Species of Exotic Butterflies"

[Cabintom]

Ok, so I'm not sure if this is the right place to put this. I'm trying to figure out the proper citation for the description of Falcuna libyssa. It can be found here: https://www.biodiversitylibrary.org/ite ... 2/mode/1up (as Liptena libyssa).
Invariably, in publications, I see the species referenced as Falcuna libyssa (Hewitson, 1866). The trouble I'm having is that this 5th volume of Hewitson's work seems to have been published between 1872 - 1876 (at least that's what's printed on the title page... with a penciled in note that says "Pub Jan. 1 1877". Confusingly, in the page previous to libyssa's description there's another penciled in note under genus Liptena stating "Pub Jan, 1866".

Does anyone know what's going on here?

Also, there are no page numbers, how do I properly cite the page in which the description appears? Count the pages? Do I skip blank ones?

[adamcotton]

Here's how Funet cites this:

https://ftp.funet.fi/index/Tree_of_life ... e/falcuna/

Falcuna libyssa (Hewitson, 1866)
Liptena libyssa Hewitson, 1866; Ill. exot. Butts [5] (Pentila & Liptena): [66], pl. [33], f. 5-6; TL: S.Nigeria, Calabar

Adam.

[Cabintom]

Thanks Adam. Yeah, I had consulted Funet. I'm wondering how that 1866 date was arrived at. There must be some reasoning why it's that and not some year between 1872 & 1876.
Also wondering if it should be (Hewitson, 1866) or (Hewitson, [1866])?

[adamcotton]

I think it should be (Hewitson, 1866) as the date of publication was not stated in the part but apparently it was printed on the wrappers. The dates of publication of each part are known, and so the year 1866 is correct. If I understand correctly, the parts were not published in numerical order, which may have produced dating anomalies.

Adam.

[Cabintom]

Thanks for your input Adam. I appreciate it!