Nimblebit drew some blood last week when the developer of Tiny Tower cast a stone at Zynga, via an infographic, for copying Tiny Tower in an upcoming mobile game called Dream Heights.

Buffalo Studios is using the same tactic tonight as it calls out Zynga Bingo for being a copycat of Buffalo’s popular Facebook game Bingo Blitz. In the infographic at right, the company points out the similarities in graphics, layout, and game play between Zynga’s recently unveiled Zynga Bingo game and Bingo Blitz.

The copycat charges in social games are turning into an epidemic. Earlier today, Spry Fox announced it was suing 6waves Lolapps for copyright infringement for allegedly copying Spry Fox’s game Triple Town by creating Yeti Town.

“We wanted to alert you to the striking similarities between Zynga’s recently announced game, to our game Bingo Blitz,” said Salim Mitha, vice president of product marketing and operations at Santa Monica, Calif.-based Buffalo, in an email.

Buffalo launched Bingo Blitz on Facebook a year ago and it is the No. 1 Bingo game on the social network with more than 1 million daily players.

Mitha said that Zynga copies aspects of the game including the use of different themed Bingo rooms and cities, as well as updated powerups.

Buffalo was founded in 2010 and it has 45 employees. Bingo Blitz is the company’s only game. We’ve asked Zynga for comment.

[Update: Zynga CEO Mark Pincus blasted back and said that Bingo Blitz borrows from Zynga’s Poker Blitz game.]