Seaver: Studies in Colorado Fungi 61 



Ascobolus stercorarius (Bull.) Schroter in E. & P. Nat. Pfl. 



i : 198. 1897 



Cultivated on cow dung from Geneva Creek Canyon and 

 Tolland. 



Ascobolus xylophilus sp. nov. 



Plants gregarious, sessile, 1-2 mm. in diameter, dark-colored, 

 blackish to the naked eye, reddish-brown with the lens ; hymenium 

 slightly concave or nearly plane ; asci large, cylindric or clavate, 

 175—235 X 30-35^, operculate, 8-spored; spores i-seriate or par- 

 tially 2-seriate above, large, ellipsoid, with ends narrowed, purple, 

 at first smooth, becoming slightly roughened, 35-38 X 13-15/*. 



On the weathered surface of some coniferous wood, Geneva 

 Creek Canyon, September, 1910. 



Two species of Ascobolus are reported by Saccardo on pine 

 wood : Ascobolus Ugnatilis Albert. & Schw. and Ascobolus denu- 

 datus Fries. Our species is very different from either, both in 

 gross and spore characters. This is, so far as we can find, the only 

 North American species of the genus reported on wood, most of 

 the species occurring on the dung of animals. 



Lasiobolus equinus (Mull.) Karst. Act. Soc. Faun. Fl. Fenn. 



2: 122. 1885 

 On cow dung and horse dung from Tolland. 



Ryparobius crustaceus (Fuckel) Rehm, Ber. Naturh. Ver. 

 Augsburg 26: 17. 1881 



Cultivated on rabbit dung from Geneva Creek Canyon. 

 Ryparobius pachyascus Zukal ; Rehm, Hedwigia 27 : 167. 1888 



Cultivated on horse dung from Tolland. 



Ryparobius sexdecimsporus (Crouan) Sacc. Syll. Fung. 8: 541. 



1889 



Cultivated on cow dung from Geneva Creek Canyon. 



Saccobolus Kerverni (Crouan) Boud. Ann. Sci. Nat. V. 10: 



229. 1869 



On cow dung from Geneva Creek Canyon. 

 Saccobolus neglectus Boud. Ann. Sci. Nat. V. 10: 231. 1869 



Cultivated on horse dung from Geneva Creek Canyon. 



