Several ancient chronicles of the exploits of Alexander the Great depict him encountering creatures that were not entirely Human. These are creatures that modern people would describe as Ape Men.
From Nearchus voyage home [Note]
"They, astounded at the flash of the armour, and the swiftness of the charge, and attacked by showers of arrows and missiles, half naked as they were, never stopped to resist but gave way. Some were killed in flight; others were captured; but some escaped into the hills. Those captured were hairy, not only their heads but the rest of their bodies; their nails were rather like beasts' claws; they used their nails as if they were iron tools... everything else they cleft with sharp stones; for iron they did not possess. For clothing they wore skins of animals, some even the thick skins of the larger fishes."
Another record of Alexanders exploits, Historia Alexandri Magni Note, mirrors the story of Nearchus voyage home and may have contributed it. It also tells of other strange folk that some have interpreted to be ape-men. The first was large viscous, cannibalistic and resembled Gorillas or even yeti. The second was a small hospitable and friendly variety.
Remnants of this race of ape men, if they truly did exist at all, may still be extant as the region has tales and lingering evidence of creatures known as Barmanou . The Barmanou is a human-ape like creature reported in the mountains of western Pakistan and Afghanistan, in particular a region known as Shishi Kuh Valley. Mountain Shepherds have reported sightings for Centuries. Some cryptozoologists consider it the local equivalent of the yeti or Central Asian Almas while others put it in a class by itself.
Alexander only made it into India as far as the regions we now call Pakistan, but further south on the Indian subcontinent is the land in which the Vanara are said to have dwelt. The Vanara ape men were supposedly a semi intelligent Human sub species that figure prominently in Vedic literature. See: The Vanara Ape Men
In his Natural History Pliny the Elder describes a race of silvestres [Which translates to wild], he describes them as creatures in India who had humanoid bodies but a coat of fur, fangs, and no capacity to speak. India in Plinys time was pretty much considered anything East of Persia [Iran]
1. Nearchus' voyage home. When Alexander invaded Asia in May 334 BC, Nearchus accompanied him as his Admiral. He wrote a book about the naval expedition, which was not only a military campaign but voyage of discovery. The book he wrote known as the Indike is lost to the ravages of time. Elements of its content have survived from several sources, in particular the Indike by Arrian of Nicomedia which consists of two books. The first was a description of Indian geography and culture, the second was Nearchus' voyage home. See: Nearchus' voyage home Translation by E. Iliff Robson
2. Historia Alexandri Magni [Histories of Alexander the Great] believed to have been written by a Quintus Curtius Rufus in the First Century AD, whom some scholars believe to be a pseudonym masking another. Later manuscripts attribute its origins to Alexander's court historian Callisthenes, who died before Alexander and could not have possibly written a full account of Alexanders life. The unknown author is sometimes referred to as Pseudo-Callisthenes. Its earliest extant versions are in Greek from the 3rd Century.