Dravidoid peoples are so strikingly similar to Negroids that they have always been considered as two branches of the same Negroid Race. Thus, they are termed 'Aithiopoi' or 'Gedrosoi' (Gedrosians) in Greek, 'Aethiopes Asiatici' ('Asian Ethiopians') or 'Aethiopes Orientales' ('Eastern Ethiopians') in Latin, & 'Malabar Negroes' in British English.
Physiologically, Dravidoid peoples display adaptation to the warm Sudano-Deccanian climate, incl. melanin-laden dark black & thick 'binghi skin' as protection against solar rays; broad noses & everted lips to expose mucuous membranes; pronounced steatopygia as visible with Dravidian women; & enlarged external genitalia in case of Dravidian Men to increase heat dissipation over larger surface area, as per Allen's Rule.
Linguistically, Indo-Aryan languages display Afro-Dravidian influence: "Accordingly, the introduction of cacuminal sounds into the Aryan languages of India when that country was invaded by unpolished Nordic peoples is due to the influence of Dravidian Negroes." - 'Nations nègres et culture' Cheikh Anta Diop, NY: Lawrence Hill, 1974, p 116.
The Rig Veda, ancient sacred hymns of India, tells of the fierce struggles between these whites & blacks for the mastery of India. It sings of Aryan deities who rushed furiously into battle against the black foe. The hymns praise Indra, the white deity, for having killed fifty thousand blacks, 'piercing the citadel of the enemy' & forcing the blacks to run out in distress, leaving all their food & belongings." - 'W.E.B. Du Bois on Asia: Crossing the World Color Line' W E B Du Bois. eds. B Mullen & C Watson. Jackson: Uni Press of Miss., 2005, p 9.
2) "... India, before being invaded by white people, was altogether peopled by Negroes, for the very simple reason that its present pop.n is made up of Dravidian Negroes." - 'Weights for Weighing Gold' Georges Niangoran-Bouah. Présence Africaine v 17-20 (1963) 193-210: p 206.
3) "... the Dravidian Negroes of Australia have entirely lost the art of making even the commonest tools & instruments ..." - 'Brotherhood economics' Toyohiko Kagawa. NY: Harper & Bros, 1936, p 56.