Ludwig 1947. Studies on the protozoan fauna of the larvae of the crane-fly, Tipula abdominalis. II. The lifo history of Ithania wenrichi, n. gen., n. sp, a ooccidian, found in the caeca and midgut, and a diagnosis of Ithaniinae, n. subfamily. Transactions of the American Microscopical Society, 68 1947: pp. 22-33