Phyllosticta sacchari Speg. 



Spots very numerous, with a tendency to occur near the midrib^ 

 often confluent, especially at the ends, long linear, occasionally oval, 

 rimuiug out into long points, .5-2 cm. X 1-2 mm, at times much 

 larger, red brown at first, then dull tan or brown at center with red,, 

 definite, not raised margin; pyenidia hypophyllous on older spots, 

 few to many, uniformly scattered, immersed, membranous, sub-glo- 

 bular, 125-175 mu. diam., prominent ostiole. conidia hyaline to smoky, 

 ovoid to cylindric, ends rounded, 12-16 mu. X 2.5-4 mu., one or two 

 guttulate. Description from specimens. 



Porto Rico. — On living cane leaves, Juncos. July. 1915, 2924; 

 Rio Piedras, March, 1917, 6278. (PI. XXIV, fig. 4.) 



In common with some of the other leaf spots, this form has not 

 been worked out satisfactorily. It is probably not P. sacchari of 

 Spegazzinia (73) but it has not been thought Avorth while to name it 

 anew. If it should appear in some abundance hereafter warranting 

 further studies, an attempt will be made to place it exactly. Our 

 specimens differ from one determined by Miss Young from the Stevens' 

 collection as P. mcchari. The frngment of this material seen was 

 apparently Leptosphaeria sacchari. 



Vermicularia graminicola West. 



Porto Rico. — On dead cane stalk, Rio Piedras, Feb.. 1914, 1270. 

 (PI. XXVIII, fig. 6-8.) 



This species is characterized by erumpent.spherical pyenidia, with 

 long black erect setae. It differs very decidedly from V. sacchari, 

 described recently by Averna-Sacca, (lOO) in that the latter possesses 

 biciliate spores, and those of the present species are muticate. 



DiPLODIA cacaoicola P. Heuu. 



Pyenidia scattered in the cortex of the host, innate. l)lack; conidia 

 ellipsoid oblong or sub-ovoid, 1-septate, obtuse at both ends, loculi 

 1-guttulate, black, 18-22X12-14 mu. 



PoRT.o Rico. — On dead cane stalks, Rio Piedras, Jan., 1912, 4169^ 

 Feb., 1914, 1321, 1347, Oct., 1914, 2278, Oct., 1915, 3169, March, 

 1917, 6308; Vieques, Jan., 1917, 6194. Fairly common everywhere. 

 (PI. XXI, fig. 1; pi. XXXI, fig. 8-10.) 



This fungus is most commonly found on dead seed pieces or rotten 

 stalks, where the fruiting Ijodies appear as tiny black bodies Iniried 

 in the tissues. In some instances, however, it is jipjiarcntly able to- 

 act as i\ partinl parasite, and to cause some loss. Tins action lias 



220 



