Croft and Kay take their places in a 32-man squad led by Bath lock Steve Borthwick.
Croft made his England bow in the Six Nations encounter with France in Paris this year and currently has three caps to his name, while Kay is a World Cup winner looking to add to his current tally of 58 international appearances.
Both players have played important roles for Tigers this year, with Croft making 15 starts and five appearances as a replacement and Kay starting on 17 occassions, including the last seven fixtures in all competitions.
Tigers team-mates Richard Blaze, George Chuter, Jordan Crane, Ollie Smith and Tom Varndell are all involved with the Saxons, who travel to the USA and Canada.
England squad to tour New Zealand
Forwards
Steve Borthwick (Bath Rugby) Captain
Tom Croft (Leicester Tigers)
Nick Easter (Harlequins)
Dylan Hartley (Northampton Saints)*
James Haskell (London Wasps)
Jason Hobson (Bristol Rugby)*
Ben Kay (Leicester Tigers)
Nick Kennedy (London Irish)*
Michael Lipman (Bath Rugby)
Lee Mears (Bath Rugby)
Luke Narraway (Gloucester Rugby)
David Paice (London Irish)*
Tom Palmer (London Wasps)
Tim Payne (London Wasps)
Tom Rees (London Wasps)
Andrew Sheridan (Sale Sharks)
Matt Stevens (Bath Rugby)
Joe Worsley (London Wasps)
Backs
Olly Barkley (Bath Rugby)
Mike Brown (Harlequins)
Danny Care (Harlequins)*
Danny Cipriani (London Wasps)
Toby Flood (Newcastle Falcons)
Charlie Hodgson (Sale Sharks)
Jamie Noon (Newcastle Falcons)
Topsy Ojo (London Irish)*
Pete Richards (London Irish)
Paul Sackey (London Wasps)
David Strettle (Harlequins)
Mathew Tait (Newcastle Falcons)
Mike Tindall (Gloucester Rugby)
Richard Wigglesworth (Sale Sharks)
* Denotes uncapped player
England Saxons Barclays Churchill Cup squad
Forwards
Steffon Armitage (London Irish)
Richard Blaze (Leicester Tigers)
Alex Brown (Gloucester Rugby)**
George Chuter (Leicester Tigers)**
Alex Clarke (Bristol Rugby)
Jordan Crane (Leicester Tigers)
Jack Forster (Gloucester Rugby)
Tom Guest (Harlequins)
Chris Jones (Sale Sharks)**
Nick Lloyd (Saracens)
Chris Robshaw (Harlequins)
Will Skinner (Harlequins) Captain
George Skivington (London Wasps)
Andy Titterrell (Gloucester Rugby)**
Rob Webber (London Wasps)
Dave Wilson (Newcastle Falcons)
Backs
Nick Abendanon (Bath Rugby)**
Anthony Allen (Gloucester Rugby)**
Matt Banahan (Bath Rugby)
Lee Dickson (Newcastle Falcons)
Ben Foden (Sale Sharks)
Paul Hodgson (London Irish)**
Adrian Jarvis (Harlequins)
Ryan Lamb (Gloucester Rugby)
Ugo Monye (Harlequins)
Ollie Smith (Leicester Tigers)**
Tom Varndell (Leicester Tigers)**
Dominic Waldouck (London Wasps)
** Denotes capped player
