20 
Mycologia 
plete as possible, the species and hosts from the new material, 
not mentioned in the preceding part as occurring in Porto Rico, 
are here appended. In order to conserve space the remainder of 
the 1915 material is not cited, although many additional localities 
are represented. 
Two species were added to the previous supplementary lists, 
after the statistics on pages 170 and 171 were in type. One was 
a Porto Rican species and the other from another West Indian 
island. The collections of 1915 here recorded add 12 species to 
the foregoing record of Porto Rican rusts. The total number of 
species of rusts now known from Porto Rico is brought up to 135, 
and from all the West Indian islands to 155. Of this large rust 
flora Professor Stevens secured during his twenty-four months’ 
sojourn in the West Indies all but eleven of the known species 
from Porto Rico, and all but thirty from the whole West Indian 
flora. Truly a remarkable record. His collections supplied 
twenty species new to science and an equal number of additional 
species not previously recorded for North America, beside many 
new hosts. 
Additional Species from Porto Rico 
143. Ravenelia Cebil Speg., on Piptadenia peregrina (L,.) Benth. 
(Caesalpiniaceae) Pehuelas, July, 1915, II, pi39- No au- 
thentic material of this South American species has been 
seen, but the ample Porto Rican material, so far as uredinia 
are concerned, agrees closely with Spegazzini’s excellent 
description (An. Mus. Nac. B. Aires 19; 295. 1909). 
The Porto Rican host, P. peregrina, is placed by Engler & 
Prantl in the same third section of the genus Piptadenia 
as the Argentine type host, P. macrocarpa, evidencing near 
relationship. The assignment of the collection is, there- 
fore, made with considerable confidence, although the telia 
are absent. 
144. Ravenelia cassiaecola Atks., on Chaniaecrista AescJiyno- 
mene (DC.) Greene (Caesalpiniaceae), El Gigante, July 
16, 1915, II, Sjoj. Heretofore this rust has been known 
only from the southeastern United States. 
145. PucciNiA Cynodontis DeLac., on Capriola Dactylon (L.) 
