39^ Natural History Bulletin. 



stay at Castillo Viejo, within a radius of a few miles of the 

 little village. When it is known that the species enumerated 

 in this article, constitute less than one fifth of the species col- 

 lected at this one place, some idea of the richness of the my- 

 cological flora of a tropical region may be formed. 



It is to be noted that about two-fifths of the species collected 

 are new species and that two genera and thirteen species are 

 not given in North American Pyrenomycetes. 



The species and genera mentioned in this paper and not 

 described in North American Pyrenom3^cetes, are here de- 

 scribed. The descriptions are translations from Prof. P. A. 

 Saccardo's Sylloge in all cases, for I discovered, in the few 

 in which I had the opportunity to compare the original descrip- 

 tions with those of the Sylloge, that those of the Sylloge are 

 fuller. This is done for the benefit of those who may not 

 have a more comprehensive treatise upon this very interesting 

 group of plants than Mr. J. B. Ellis' valuable work. North 

 American Pyrenomycetes. 



All the species have been identified and the new species 

 described by Mr. J. B. Ellis, who has also re-written the de- 

 scriptions of Xylaria giiyaniensis, JT. obovata^ X. fiimila and 

 Glaziella vesiculosa. Nothing could be made of a few speci- 

 mens, because they were old or immature. 



I have followed the classification given by Mr. Ellis in North 

 American Pyrenomycetes. 



ORDER PYRENOMYCETES. 

 I. PERISPORIACE.E. 



FAMILY ERYSIPHE^. 

 No species collected. 



FAMILY PERISPORIE-(E. 

 Meliola Horrida E. & E. n, sp. 



Hypophyllous. Mycelium black, forming orbicular patches 

 2-4 mm. dia., and consisting of much branched and anasto- 



