Christie joined Southland and Highlanders prop Ethan de Groot, Tasman and Crusaders loose forward Ethan Blackadder and Waikato and Chiefs second five-eighths Quinn Tupaea as the newcomers in the 36-man squad named to contest the Steinlager Series against Fiji and Tonga.
The Blues and Tasman player Christie is from the Borders region of Scotland but came to New Zealand when his family emigrated when he was seven.
He stepped into the space left vacant by Hurricanes halfback TJ Perenara who needs to play a game for Wellington before he is eligible for reselection.
The Scotsman newspaper said: "It's a reward for the 25-year-old's recent form for [the] Blues but, from a Scottish perspective, there will be a nagging sense of his having slipped through the net."
It said the Melrose-born Christie had forged an impressive professional career in the world's premier rugby nation. That was capped when he played in the Blues 23-15 win over the Highlanders in the Sky Super Rugby Trans-Tasman final on Saturday.
"Asked last year about the possibility of one day playing for Scotland, Christie said 'never say never' in an interview with The Scotsman. However, that ship would now appear to have sailed."
While Finlay Christie had also represented New Zealand at gymnastics before concentrating on rugby, his brother Gregor, who also played halfback, returned to Scotland to play club rugby.