PLATE III. 



Fig. 1. — Mature pycnidia, showing a few iiuic-ellular hyaline spores and orifice from wliicli tliey 

 have been expelled. 



Fig. 2. — Nearly mature pycnidia, with attaclied Altcrnaria spores. 



Fig. 3. — Mycelium threads giving rise to AHernaria spores and an immature pyciiidium. 



Fig. 4. — Common type of AHernaria. 



Fig. 5. — Conidial form of Cladosporium developed from niicrosclcroiia found on gummy excre- 

 tions. 



All from camera lucida drawings. 



