422 
J. C. ARTHUR 
* 
striate or rugose longitudinally with more or less evident reticulations, 
especially noticeable on the large spores, sometimes verrucose-striate 
above and nearly or quite smooth below, the pores 3 or 4, equatorial. 
Secondary uredinia amphigenous and caulicolous, often covering 
and deforming the leaf stalks and young shoots, confluent on the 
leaves in irregular patches, 0.5-2.5 cm. across, early naked, highly 
pulverulent, cinnamon-brown, ruptured epidermis conspicuous; ure- 
diniospores broadly eUipsoid or obovoid, 13-19 by 18-26 fi; wall 
golden-brown, 1.5-2 11 thick, thicker above, 3-5 fi, moderately or 
sparsely echinulate, the pores 3 or occasionally 4, equatorial. 
Telia unknown. 
24. Ravenelia Entadae Lagerh. (on Mimosaceae). 
Entada sp., Mazatenango, Dept. Suchitepequez, Feb. 22, 1916, 
n, sir- 
The species has heretofore been known only from the type collec- 
tion, made by Lagerheim in Panama. 
25. Ravenelia Siliquae Long (on Mimosaceae). 
Vachellia Farnesiana (L.) W. & A. {Acacia Farnesiana Willd.), 
Laguna, Lake Amatitlan, Feb. 8, 1915, II, iQQ] Agua Caliente, 
Dept. Guatemala, Feb. 10, 1917, II, 850. 
Neither primary uredinia nor telia have yet been discovered for 
this rust, although it is not uncommon throughout southern Mexico, 
Central America, and the West Indies. 
26. Ravenelia Leucaenae-microphyllae Diet, (on Mimosaceae). 
Acacia an gustissima (Mill.) Kuntze (A.filicinaWiWd., A . filiculoides 
Trel.), Guatemala City, Jan. i, 1915, ii. III, Q; Solola, 5100 
feet alt., Jan. 27, 1915, ii. III, 138; Panajachel, Dept. Solola, 
Jan. 3, 1917, II, III, 6/4. 
Two of these collections, nos. 138 and 674, were transmitted by 
Professor Holway with the host given as Leucaena, while another 
packet of no. 674 was transmitted later with the host given as Acacia, 
the determination being supplied by Mr. Paul C. Standley of the 
National Museum. No. 9 had the host named in 1915 by Mr. Standley 
as Acacia filicina Benth. Nos. 9 and 138 are accompanied by full- 
sized seed pods. 
There appear to be no differences between this set of collections and 
the Holway collection of Ravenelia Leucaenae-microphyllae from 
Mexico. The foliage of all these collections is remarkably similar. 
The fruit has been seen for only two of them, nos. 9 and 138. It is 
