LOUISVILLE, Kentucky ( TheStreet) -- Humana ( HUM), the health insurer, said Monday second-quarter earnings rose 35% and it raised its guidance for 2011. Humana earned $460.3 million, or $2.71 a share, in the second quarter. A year earlier, the company earned $340.1 million, or $2 a share. Adjusted income in the quarter was $2.50 a share. Revenue in the quarter rose 8% to $9.28 billion, with total premiums and services revenue also up 8%. Analysts surveyed by Thomson Reuters expected Humana to earn $2.06 a share in the second quarter on revenue of $9.35 billion. Humana said it raised its 2011 earnings forecast to a range of $7.50 to $7.60 a share, up from a previous estimate $6.70 to $6.90 a share. Humana said individual Medicare Advantage membership was 1,602,500 at June 30, an increase of 10% from a year earlier. -- Written by Joseph Woelfel >To contact the writer of this article, click here: Joseph Woelfel >To submit a news tip, send an email to: firstname.lastname@example.org.