The song seems to be a parody of BOLL WEEVIL*, but they sing it at a faster tempo than BOLL WEEVIL is usually done, and they squeeze in more syllables per line than BOLL WEEVIL has.
GONNA SEND 'EM HOME
1. Oh, the Beatles are four hairy guys and they came from Liverpool. They play geetars and harmonize like Johnson's old gray mule. Gonna send 'em home. Gonna send 'em home.
2. Now the first time I saw the four Beatles, they were singin' on the video tape. Ol' Jack Paar** said, "Here they are," and the whole wide world went ape. Gonna send 'em home. Gonna send 'em home.
3. The next time I seen the four Beatles, on the really-really-really big show,*** I didn't hear one single tune 'cause the kids were screamin' so. Gonna send 'em home. Gonna send 'em home.
4. The Beatles got the money. They really hit it big, But after income taxes, all they had was four black wigs. Gonna send 'em home. Gonna send 'em home.
5. They're millionaires, they tell us. They made it overnight, And if you think we're jealous, you're absolutely right. Gonna send 'em home. Gonna send 'em home.
6. Now acts may come and acts may go, but get this on your mind: When they come back to the USA, I'll shore be hard to find. Gonna disappear—while they are here.
[* I wonder if a subtle pun inspired their choice of tune: Beatle = beetle = weevil?
[** Jack Paar showed a film (not video tape) that he obtained from the BBC on his prime-time TV show "The Jack Paar Program," January 3, 1964.
[*** The Beatles appeared live on "The Ed Sullivan Show" on Feb. 9, 1964. "Really big show" was a catch-phrase often attributed to Sullivan.]