1791 PARASITIC FUNGI— STEVENS 13 



very slight development of the radiate subicle in proportion to the size of 

 the colony. Perhaps its entire suppression resulted in some instances. 



LEVEILLELLEAE 



Leveillinopsis Stevens n. gen. 

 Stromata prosenchymatous, of parallel hyphae, superficial from a 

 hypostroma within the mesophyll, attached by the whole basal portion. 

 Spores 1-celled hyaline. 



4 Leveillinopsis palmicola Stevens n. sp. 

 [Figures 15, 16) 



Stromata usually located in rows on the major or minor veins, amphig- 

 enous, adjacent region of the leaf diseased or dead. Spots often 1 to 2 cm. 

 wide, 10 to 15cm. long and of ashen color. Stromata about 1 mm. high and 

 wide, irregularly shaped. Hypostroma of but slightly greater extent than 

 the stromata, filling the epidermis, palisade cells and much of the mesophyll. 

 Loculi few, large, 234 to 312 x 187 to 234^. Asci 8-spored, 56 to 74 x 10 to 

 14/u, biserate. Spores elliptical, hyaline, obtuse, 14 x 17 m, nonseptate, 

 paraphyses filamentous, equal to length of asci or half again as long. 



Of unknown species of palm. 



British Guiana: Kartabo, July 24, 1922, 674. 



This fungus is strictly Dothideaceous in character and clearly belongs 

 to the Leveillelleae as given by Theissen and Sydow. A new genus is 

 established for it since no genus of that group is given with l-celled spores. 

 The hypostroma is distinctly disease producing and large areas of the in- 

 volved tissue are killed. 



DOTHIDEAE 



Bagnisiopsis Theiss. and Syd. 

 Ann. Myc, 13:291, 1915. 



5. Bagnisiopsis peribebuyensis (Speg.) Theiss and Syd. 

 Phyllachora peribebuyensis Speg., F. Guar. 

 Phyllachora gibbosa Winter, Revue Myc, 7:207, 1885; 

 Phyllachora sellowii P. Henn. Engl. bot. Jahrb., 17:525, 1883; 

 Phyllachora peribebuyensis Speg. var. bullosa Rehm: Hedw., 

 36: 358, 1897. 

 On unknown plant of the Melastomataceae. 



British Guiana: Tumatumari, July 12, 1922, 223, 972. 

 This fungus appears, from the numerous collections and many refer- 

 ences in literature, to be very widespread. In Stevens' Porto Rican collec- 

 tions it is represented by many numbers.^ Notwithstanding these facts 



' Garman, P. Some Porto Rican Parasitic Fungi. Myc, 7:337, 1915. 



