One genus, Torrubia, grows chiefly on insects; Hypomyces is parasitic on dead fungi; claviceps is developed from ergot, Poronia on dung, Polystigma on living leaves, as well as some species of Stigmatea and Dothidea.
"Fungi: Their Nature and Uses"
Mordecai Cubitt Cooke
At least one case is known where honey-dew is formed as the result of the parasitic action of a fungus, namely claviceps purpurea in its conidial stage on the stigmas of cereals, and this may be compared with the sweet odorous fluid excreted by the spermogonia of certain Aecidia.
"Disease in Plants"
H. Marshall Ward