Connecticut’s two tribal-owned casinos reported declines Friday of more than 8 percent in slot machine revenue, leading to another drop in the amount they contribute each month to state government. The revenue, or the share of wagers kept by the casinos, fell to $37.1 million in January at Foxwoods Resort Casino from $40.7 million in January of 2013. Mohegan Sun reported revenue of $43.2 million, down from $47.1 million the previous January. It was the second consecutive month with declines at Foxwoods since it reported an increase in November, which broke a 22-month stretch of reports with year-over-year declines. The casinos contribute 25 percent of their slot revenue to the state of Connecticut.