MONOGRAPH OF CHAETOMIUM AND ASCOTRICHA 223 
Myc. March. 69. Sub Ch. delicatulum Roum.: Fung. Gall. 
XXXII, 3143. 
On cardboard, Cambridge, Massachusetts, Herb. R. Thaxter. 
On barrel bottoms from various localities in New England (Chivers 
Хо. до). Reported also from different parts of the United States, 
South America, and Germany. Type locality: King's Cliffe, 
England; on a candle box. 
The species was first observed in America by Ellis and was 
communicated to Cooke who described it as Ch. sphaerospermum, 
as indicated in the above synonymy. Тһе writer has been able 
to examine specimens of the original material collected by Ellis, 
and has found it to be identical in every respect with Ascotricha 
chartarum. 
Although this species appears to be so clearly characterized it 
has been repeatedly re-described, first in 1879 by Cooke and 
Ellis as above mentioned. 
In 1885 Winter in his Pilze Deutschlands (110, p. 157) includes 
this species under the name Ch. chartarum, in apparent ignorance 
of the fact that this combination had already been used by Ehren- 
berg (28, p. 27) for a wholly different plant, and in the same year 
Roumeguére added still another name to the list by re-describing 
this plant as Ch. delicatulum, since an examination of the descrip 
tion given by him, as well as a study of the authentic specimens 
distributed in Fung. Gall. No. 3143, leave no doubt as to its 
synonymy. 
Schroeter (89) in 1894, being aware of the previous use of the 
name Ch. chartarum by Ehrenberg, but following Winter M his 
generic reference of the present species, completed. the list of 
synonymy by adding yet another name Ch. Berkeley. 
In 1897 the form was redescribed under the new name Ch. 
Zopfii by Boulanger (10), to whom we owe a Very complete account 
of its morphology and development. T his author made excellent 
figures which place the identity of the plant which he had before 
him beyond question. 
During the publication of this paper the writer has noted an 
article by Peyronel (68), in which he transfers this species from 
the genus Chaetomium to that of Ascotricha, still retaining Bou- 
langer's specific name. Ав there seems to be no doubt that Ch. 
