<i>Boiga trigonata</i>, a snake.
Aleksandr Mikhailovich Nikolskii (1858-1942)
Published in 1916 in Russia
Copy of <a rel="nofollow" class="external text" href="https://archive.org/details/presmykaiushchii02niko">scans</a> from Presmykaiushchiiasia (Reptilia)