Arthur and Kern : North American Peridermium 121 
I. Aecia tongue-shaped, 1-3 mm. long by 0.7-1. 5 mm. high; 
peridial cells ellipsoid in face view, 19-30 x 35-58 p, overlapping, 
the side walls 4-6 p thick, the inner wall rather coarsely verru- 
cose with slightly irregular and somewhat deciduous tubercles ; 
aeciospores broadly ellipsoid or globoid, 17-22x22-31 p, the wall 
2-3.5 p thick, densely verrucose with prominent elongate papillae. 
On Pinus rigida Mill., Ohio ( Kellerman , Sugar Grove, May 17, 
1902, May 1902 in Ohio Fungi 104, May 1903, May 30, 1904; 
Werner, Ironton, May 27, 1892) ; Maryland ( Norman ) ; New 
Jersey ( Martindale , in the previous paper this specimen was 
erroneously listed under Per. acicolnm ) ; North Carolina ( von 
Schrenk). 
Type collected in Europe, but the original publication gives no 
details concerning the host, place, date, or collector’s name. 
Distribution: From New Jersey and central Indiana south- 
ward to central North Carolina; also in Europe. The telial stage 
is known over a slightly wider range. 
As stated in the previous paper culture work has been done 
both in Europe and North America showing the relation of this 
species to Coleosporium Campanulae. No additional work has 
been reported since our last paper. 
10. Peridermium guatemalense sp. nov. 
0. Pycnia 0.4-0.7 mm. broad by 0.5-1. 5 mm. long, low-co- 
noidal, 51-77 p. high. 
1. Aecia flattened laterally, 1.5-4 mm. long by 1-1.5 mm. high; 
peridial cells ellipsoid to globoid in face view, 23-26x26-71 p, 
overlapping, the side walls 8-10 p thick, the inner wall moderately 
verrucose with somewhat irregular papillae ; aeciospores ellipsoid, 
19-23x29-35 p, the wall 2. 5-3. 5 p thick, rather coarsely verru- 
cose with irregular tubercles. 
On Pinus filifolia Lindley, Guatemala {Kellerman) . 
Type collected at Antigua, Depart. Sacatepequez, on Pinus fili- 
folia, Feb. 13, 1905, W. A. Kellerman 4626. 
Distribution : Known only from the type locality in central 
Guatemala. 
When the material first came into our hands we were inclined 
to call it Per. gracile; it was even listed in a paper on The Rusts 
of Guatemala (Kern, Jour. Myc. 13: 23. 1907) as that species. 
