Possible Clues:

• Literary race likened to 'fatted cattle'
• Frugivorous creatures of sci-fi
• Race created by Wells
• Morlock's counterpart in science fiction
• Wells's Upper-worlders
• Race invented about 800,000 years before its time
• H.G. Wells' imaginary race
• Word repeated before 'lama sabachthani' in Mark 15
• 'The Time Machine people'
• Cliff-dwelling race in a 2002 film