538 
J. C. ARTHUR 
220. Uredo Triniochloae Arth. & Holw. sp. nov. (on Poaceae). 
Triniochloa stipoides (H.B.K.) Hitchc, San Rafael, 7000 feet alt., 
Dept. Guatemala, Jan. 10, 1915, 59. 
Uredinia chiefly epiphyllous, numerous, small, elliptic, 0.2-0.5 
mm. long, soon naked, yellowish, pulverulent, ruptured epidermis 
inconspicuous; paraphyses numerous, erect, clavate or capitate, 
unusually large, 10-29 by 58-98 /i, the wall yellowish, uniformly thin, 
1-2 sometimes slightly thicker above; urediniospores ellipsoid or 
obovoid, 16-19 by 19-26 ^i; wall yellowish to pale cinnamon-brown, 
thin, about i finely and closely echinulate, the pores obscure. 
The species is remarkable for its large paraphyses. 
221. Uredo Zeugitis Arth. & Holw. sp. nov. (on Poaceae). 
Zeugiies Hartwegi Fourn., San Rafael, 7000 feet alt.. Dept. Guate- 
mala, Jan. 9, 1915, 49. 
Uredinia chiefly hypophyllous, scattered, elliptic, small, 0.3-0.5 
mm. long, rather tardily naked, cinnamon-brown, ruptured epider- 
mis evident; urediniospores broadly ellipsoid, 19-21 by 23-26 )u; wall 
cinnamon-brown, moderately thick, 1.5-2.5 /x, finely and closely 
echinulate, the pores 3, sometimes 4, equatorial. 
The host belongs to the tribe Festucaceae, in which no rust iden- 
tical with this one has been seen. 
222. Uredo rubescens Arth. (on Artocarpaceae). 
Dorstenia Contrajerva L., Palin, Dept. Amatitlan, Dec. 24, 19 16, 
^34- 
Dorstenia Houstoni L,, Mazatenango, Feb. 22, 1916, 520; San 
Felipe, Dept. Retalhuleu, Jan. 13, 1917, 708. 
The first record for this rust outside of Porto Rico. No telia have 
yet been discovered. 
223. Uredo Fuchsiae Arth. & Holw. sp. nov. (on Onagraceae). 
Fuchsia splendens Zucc. (?), Volcan de Agua, Dept. Sacatepe- 
quez, March 7, 1916, 5<5j (type). 
Lopezia hirsuta Jacq., Antigua, Dept. Sacatepequez, Dec. 28, 1916, 
64Q (with some Puccinia Fuchsiae). 
Uredinia hypophyllous, in small irregular groups 0.5-3 y^^- 
across, round, 0.1-0.2 mm. in diameter, long covered by the epider- 
mis, pulverulent, pale yellow, ruptured epidermis evident; peridium 
hemispheric, delicate, opening at first by a small pore, later breaking 
away and exposing the spores, the peridial cells rectangular or rhombic, 
abutted, the walls colorless, thin, i )U, not thickened or sculptured at 
