io Journal of Agricultural Research voi. vii, No. i 
urement of conidial apparatus be used to define the group, certain strains 
of A . ochraceus Wilhelm and A . wentii Wehmer certainly fall within it. 
All of these forms are clearly related and may properly constitute a 
section of the genus Aspergillus without venturing a guess as to their 
genetic connection. 
The group, therefore, may be held to consist of a series of forms, some 
of which seem to be connected so closely by intergrading forms as to 
make separation difficult if not impossible. Other members of the group 
notably represented by the mutations of Schiemann 1 show permanent 
and striking differences. A. carbonarius of Bainier may be a similar 
case. Upon morphology alone we may therefore be justified in retain¬ 
ing certain specific names as well-defined representatives of the sections 
of the group. The arrangement proposed begins with A. nanus Mont, for 
the diminutive form, A. niger Van Tieghem for the most numerously 
occurring section with primary sterigmata 20-30/* in length, A. phoenicis 
(Corda) Pat. and Delacr. with primary sterigmata about 50/*, A. pul- 
verulentus McAlpine, or A. strychni Lindau, with very long sterigmata, 
and end our series with A. carbonarius , which has the long sterigmata 
and very large conidia. 
In suggesting that the following names be retained as designating 
representative cultures falling within fairly well-defined sections of the 
group, it remains uncertain how many names may ultimately be re¬ 
quired to designate forms permanently considered as species. The 
sections and citations follow: 
I.—FORMS WITH SIMPLE STERIGMATA UP TO 20/* IN LENGTH 
A. nanus Monthgne, 1856, Syll. Gen. Spec. Crypt., p. 300, no. 1112. Saccardo, 
1886, Syll. Fung. v. 4, p. 71. 
11a (black or brown).—FORMS with both primary and secondary 
sterigmata; primary 20-30/* in length 
A. niger Van Tieghem, 1867, in Ann. Sci. Nat. Bot., s. 5, t. 8, no. 4, p. 240. As 
probable synonyms the following may be listed: 5 . antacustica Cramer, 1859, in 
Vrtljschr. Naturf. Gesell. Zurich, Jahrg. 4, Heft 4, p. 325; A. echinosporus Sorok., 
Paras. 2 p. 40, pi. 7, fig. 82-87. Ref. in Saccardo, 1895, Syll. Fung., v. 11, p. 592; 
A . ficuum (Reich.) Hennings, 1895, in Hedwigia, Bd. 34, Heft 2, p. 86; A.fuliginosus 
Peck, 1873, * n Bui. Buffalo Soc. Nat. Sci., v. 1, p. 69; 1874, in 26th Ann. Rpt. N. Y. 
State Mus. Nat. Hist. [1872], p. 79; A. nigrescens Robin, 1853, Hist. Nat. V6g. Paras., 
p. 518, atlas, pi. 5, fig. 2; A. nigricans Wreden, 1867, in Compt. Rend. Acad. Sci. 
[Paris], t. 65, no. 9, p. 368. A. phaeocephalus (Durieu and Montagne), 1881, in 
Saccardo, Fungi Ital., fig. 903; 1886, in Saccardo Syll. Fung., v. 4, p. 76; S. pseudo - 
nigra Costantin and Lucet, 1903, in Bui. Soc. Mycol. France, t. 19, fasc. 1, p. 33-44; 
A . ustikigo Beck, 1888, in Wawra. Itin. Princ. S. Coburgi, T. 2, p. 148; 1892, in 
Saccardo, Syll. Fung., v. 10, p. 526; A. welwitschiae (Bresadola) Henn. 
1 Schiemann, Elisabeth. Op. cit. 
2 Not seen by the author. 
