1946, Erich Hofacker, "Review of The Concept of Love in the Works of Hermann Stehr by Karl Siegfried Weimar," Monatshefte, vol. 38, no. 1, p. 56:
An interesting angle brought out by the author is the telepathetic bond of affinity that, according to Stehr, exists between true friends.
1981, Roger Schlobin, "Book Reviews: Andre Norton Reprinted," Science Fiction Studies, vol. 8, no. 2, p. 220:
Storm Over Warlock and its sequel, Ordeal in Otherwhere, feature two important themes in Norton's fiction: sentient, benevolent, and telepathetic animals and the profound value of empathy and cooperation.
1997, Satyajit Ray, Gopa Majumdar, The royal Bengal mystery and other Feluda stories, Puffin ISBN9780140275902, page 53
Feluda stared, as though he had seen a ghost, and exclaimed, 'My word, what a coincidence! I was just dialling your number.' 'Really? Now, that must mean I have got a telepathetic link with you, after all,' Lalmohan Babu laughed, looking pleased. Neither of us had the heart to tell him the correct word was 'telepathic'.
2002, Lung-Kee Sun, The Chinese National Character: From Nationhood to Individuality, M.E. Sharpe ISBN9780765608260, page 107
A post-World War I book by A. Linckewicz, a professor at the University of Vienna, averred that once there had existed a telepathetic human species, higher than today's human beings.
2006, Tara Gilesbie, chapter 30, in My Immortal:
Suddenly an idea I had. I clozd my eyes and using my vampire powers I sent a telepathetic massage to Drako and Vampire so they would destruct Snape.
2010, Vincent Trigili, The Enemy of an Enemy, Vydorian Realms Publishing ISBN9781452345208, page 171
“ […] Now that I can be there and pretend to care about my orders by escorting him, what he wants can be done,” I said with a big smirk. Then over our telepathetic net I said, “Andreya, please make sure to hide all our newly acquired things before I board with him.” “Will do,” she replied. “Captain, I think we are ready,” I said.
2005, Ian Souter, Pocket Tales Year 6 Twenty Pounds and All That Nonsense, page 19:
Besides, after two minutes of stretching and beaming my eyes in his direction, all I got was a dizzy spell—telepathetic, really.
1995 September 20, Matt Clonfero, “SC-21 class?”, in sci.military.naval, Usenet:
And one minor nit: consultants are not telepathic, they're telepathetic.
2000 May 24, Eskimo Joe, “Who's quote? Who's book?”, in alt.writing, Usenet:
And yes, my medium gives a good massage but when it comes to clairvoyance she's telepathetic.
2000 September 26, Village Idiot, “Blood Brothers MC”, in alt.military.police, Usenet:
Weren't you on this newsgroup a few years back trying to impress us with your psychic investigation, channeling, remote viewing BS. That was pretty telepathetic.