There have been occasional reports of 'possible' reptilian hominoids 
masquerading as human-like beings, such as the 'alien' described
on p. 109 of John Keel's book 'THE MOTHMAN PROPHECIES':

     "I am an amateur herpetologist and once kept three-fanged
cobras in my New York apartment... until my concerned neighbors 
squealed to the Board of Health.  SOME OF THE DESCRIPTIONS 
OF THE ENTITIES IMPRESSED ME AS RESEMBLING SOME 
KIND OF REPTILE RATHER THAN HUMAN MAMMALS.  I didn't 
mention the reptile notion to anyone.  But on July 24, Lia (an 
alleged alien tied-in with the Men In Black) visited Jane (a con-
tactee) and refused to talk about anything but eggs.  She took 
some eggs from Jane's refrigerator and sucked out the contents 
like a reptile!  Jane was perplexed by this exhibition and called me
soon afterward." 
     And on pp. 176-177 of Signet's 1975 paperback edition of
'MOTHMEN', in reference to this same 'contactee', Keel states:
     "...Meanwhile, Jane's phantom friends were visiting her daily 
and helpfully giving her surprising information about my own 
'secret' investigations.  My interview with the Christiansens of 
Cape May, and the details of their pill-popping visitor, Tiny, was 
then known only to a few trusted people like Ivan Sanderson.  But 
on June 12, Mr. Apol and his friends (including the being that 
called itself 'Lia', referred to above - Branton) visited Jane when 
she was alone in her house and asked for water so they could 
take some pills.  Then they presented her with three of the same 
pills, told her to take one at that moment, and to take one other 
in two days.  The third pill, they said, was for her to analyze to 
assure herself it was harmless.  They undoubtedly knew she 
would turn it over to me.  Two hours after she took the first pill she
came down with a blinding headache, her eyes became bloodshot, 
and her vision in her right eye was affected.  When her parents 
came home they expressed concern because her eyes were 
glassy and her right eye seemed to have a cast.  The sample pill 
proved to be a SULFA DRUG normally prescribed for infections of 
the urinary tract..."