RUBBER (HEVEA) DISEASES 83 
Dendrographium atrum Mass. Common on rubber excrescences around old 
tapping wounds, Amazon region. 
Diaporthe heveae Petch. On branches, Ceylon. 
Diatrupe chlorosarca B. and Br. On dead branches, Ceylon. 
Didymella oligospora Sacc. On dead branches. Malay Archipelago. 
Dimerosporium heveae Charles, n. sp. Perithelia superficial, bone brown, 
gregarious or confluent, subglobose. hypophyllous, 70 to 10,//. ; asci cylindric- 
clavate, 48 to 52 /*; spores biseriate, elongate-elliptical, 1-septate, 11 to 
12.8 by 2.5 to 3 p. Type in Pathological Collections (No. 72530), U. S. 
Department of Agriculture. Parasitic on the stroma of Catacauma huhcri 
(P. Henn.) Theiss. and Syd. Amazon region. This species suggests 
Dimerosporium manihotis P. Henn., syn. Parodiopsist manihotis (P. 
Henn.) Arnaud. (G. Arnaud. Etude sur les Champignons Parasites. 
Ann. d. Epiphytes VII, p. 72. 1921.) Arnaud states that the ascospores 
in the material studied by him were not mature, but according to Hen 
nings the spores of this species measure 9 to 13 by 3 to 3.5 ft. The material 
in the present study was very abundant, but it also appeared immature, 
whether due entirely to age or the fact of its being parasitized can not 
be definitely determined at this time. 
Diplodia caeaoieola P. Henn.=D. theobromae (Pat.) No well. 
D. rapax Mass.=D. theobromae (Pat.) Nowell. 
D. theobromae (Pat.) Nowell. Pycnidia small, submerged, scattered or aggre- 
gated in a smooth stroma or on a stroma covered with brown mycelium, 
erumpent, carbonous, black, usually ostiolate, papillate lenticular, or flask 
shaped ; conidia ellipsoid to ovate, rounded at both ends, uniseptate when 
mature, not constricted, fuliginous, or blackish brown, average (50) 24 to 
30 by 13 to 16 /a; paraphyses abundant, filiform, average 60 //. long. The 
fungus was first described by Patouillard in 1892 under the name 
Botryodiplodia theobromae. Following this it has appeared under the 
following names: Macrophoma resita Prill, and Del. (1894), Diplodia 
caeaoieola Henn. (1895). Lasiodiplodia nigra App. and Laub. (1906), 
Botryodiplodia elastiea Petch (1906). Chaetodiplodia grisea Petch (1906). 
Lasiodiplodia theobromae Griff, and Maub. (1909), Diplodia rapax Mass. 
(1910). Bancroft in 1910 described what he considered the ascigerous 
stage under the name Thyridaria tarda. From cacao stems infected with 
Diplodia he forced the production of an ascigerous fungus in damp cham- 
ber. The life history of the ascospores thus obtained was not followed 
up ; hence the assumption that T. tarda represents the ascospore stage of 
Diplodia theobromae was not demonstrated. 
D. zebrina Petch. On dead fruits, Ceylon. 
Diplopeltis simmermanii P. Henn. On leaves, East Indies. 
Diseosia sp. On dead fruits. Amazon region. 
Dothidella ulei P. Henn. Stromata erumpent. superficial. c?espitose or aggre- 
gate, stromatic. round or oval, black, ruguloso. amphigenous 0.2 to 3 
millimeters in diameter, on whitish or brownish spots; peritheeia few 
or many, ovoid, loosely or firmly united: asci numerous, clavate, rather 
obtuse at the ends, 8-spored, 50 to 85 \i long. 10 to 17 ,u broad: spores ob- 
long-elavate. hyaline. 1-septate. arranged irregularly in two rows. 13 to 
20 fi long, 4 to 5 //. broad, paraphyses present. Pycnidia (Aposphaeria ulei 
P. Henn.) small, black, spherical or ovoid, erumpent. at first submerged, 
later appearing superficial, single or aggregated, papillate, ostiolate. about 
125 to 158 /t in diameter; spores long-cylindric or fusoid, hyaline, straight 
to somewhat curved. 2 to 3 guttulate, 6 to 10 by 0.8 to 1 ,u. Conidia 
(Fusicladium macrosporum Kuyper : Passalora hereuc Mass.) appearing 
on translucent olivaceous spots on both sides of the leaf, spots later be- 
coming gray to grayish black or blackish green, at first 3 to 10 millimeters 
in diameter, later covering the entire leaf with confluent multiseptate 
hyphae forming a pseudostroma in late stages; conidiophores erumpent, uni- 
cellular or uniseptate. subglobose at the base, brown, sometimes sinuous, 
40 to 70 //. high, 4 to 7 fi in diameter: spores ellipsoid, acrogenous, ends 
obtuse or obclavate-pyriform, irregular, dark In-own. unicellular, finally 
uniseptate, 30 to 55 by 8 to 12 M . On lh vea brasiliensis and other species 
of Hevea. American Tropics. 
Erionema aureum Penzig. On dead log, Ceylon. 
Eurotium sp. In cavities in old tapping burls and on fruits parasitized by 
Phytophthora, Amazon region. 
