250 
thickened and paler in color. Spores broadly ellipsoid, polar 
bilocular, 48-12 mic. Reaction with potash bright red. 
Upon bark of various trees in the mountain regions, Mon- 
terey, Mexico; Mr. C. G. Pringle. A very fine and beautiful 
species belonging to the stock of Callopisma. (Lecanora aphan- 
otripta, Nyl. Lich. Japonice, 104). 
BUELLIA AMPHOREA (Tek.), Eck. Thallus mostly contiguous, 
disposed in broad, irregular patches, from smoothish to finely 
granulose, gradually becoming thin on the margin, supported 
by a delicate bluish hypothallus, from ashy green assuming a pale 
yellow color. Apothecia scattered, diffiform, elevated, from red- 
dish brown to very black, concave, disk pale, surmounted by a 
thick rugose thalline margin. Spores oblong-ellipsoid, brown, 
bilocular 19-1? mic. : 
On various barks, mountains near Monterey, Mexico. Mr. C. 
G. Pringle, No. 112. This species has most likely been quite 
unnoticed, and from the general characters referred to a closely 
allied species, B. parasema. (Lecidea amphora, Tek.). 
OPEGRAPHA MESOPHLABIA, Nyl. Thallus membranous, 
slightly roughened, uneven, delicately wrinkled and tartrous, €x- 
panding uniformly into a regular crust, from pale brown becom- 
ing olivaceous and fading into an ashy shade. Apothecia brown, 
simple, becoming tortulose, and assuming no regular system, 
being stout and rather prominent, convex supported by a paler 
thalline border. Spores broadly ellipsoid or sub-fusiform, quadri- 
locular, brown, 4°-29 mic. 
Usually upon rough barks in the neighborhood of San Luis — 
Potosi, Mexico. Mr. C. G. Pringle, No. 230. This beautiful 
species, so far as I am aware, occurs only in the region specified. 
OPEGRAPHA MICROBLEPHIA, Nyl. Thallus smooth but 
somewhat granulose, indistinctly obscured by the numerous 
apothecia, from pale ashy to dull white, dispersed irregularly over 
contracted areas. Apothecia wavy and irregular, frequently 
anastomosing and branched, diffiform and moderately elevated, 
concave with an incurved, thalline margin. Spores broadly dac- 
tyloid, quadrilocular, brown, 11-12 mic. 
2 
On the bark of Quercus, in the mountains of Monterey, Mex- 
eae Mr. C. G. Pringle. This rare species has probably escaped 
notice, yet the general aspect which it bears, and the slight 
resemblance to other species, make the type distinct. 
