94 
CHARLES THOM AND MARGARET B. CHURCH 
mostly 2.5-3 ju in diameter. Perithecia not found in most of the 
strains investigated, abundantly produced in certain strains [data 
from No. 4188.21] up to 300 m in diameter, not colored, or very pale 
salmon, with walls scarcely colored, consisting of a single layer of 
cells, crushing easily, covered by a loose network of uncolored sterile 
hyphae; asci abundant, filling the perithecium within a few days, 
from 8 ju by 10 /z to 10 by 12 subglobose, breaking down quickly 
to leave the perithecium full of ripe ascospores; ascospores bi- 
convex, 7 /X by 4 ju, consisting of a central body 5 /z by 4 /z, with two 
frilled equatorial bands about i m in width and 3 to 4 similar but 
narrower and anastomosing bands on each convex surface, separating 
into 2 valves in germination. 
All strains grew over a wide range of temperature, better at 37° C. 
or higher than at lower temperatures. A few strains produce green 
conidial areas only at high temperature. 
Habit. — Variable and widely distributed in soil and soil-con- 
taminated substances, on forage, and on grain, as a cause of asper- 
gillosis in birds. 
Table 2 
Comparative Measurements of Aspergillus fumigatus and Allies 
Name 
Habit 
Stalk 
Vesicle 
Sterigmata 
Conidia 
A. aviarius 
A. bronch ialis 
A . fischeri 
A . flavo-viridescens 
A . fumigatoides 
A. fumigatus 
A . f. var. tumescens 
A . gracilis 
A . gracilis var. exiguus 
A . keratitis 
A . lignieresi 
A . malignus 
A . olivaceus 
A. penicilloides • 
New Orleans Culture 
A . pusillus 
A . quiniriae 
A. ramosus 
A . viridogriseus 
* 
* 
* 
* 
Floccose 
* 
No adeqi 
Floccose 
* 
Data ent 
* 
Floccose 
* 
Hallier's 
Floccose 
7.5t 
280-300 X 9 
300 X 6-7 
150-310x52 
150-340 
250 X 2.8 
-3 diam. 
late description. 
180-230 X 6.8 
-1000 X 3 
rely lacking. 
-100 X 4.5 
-200 X 3-7 
50-74 X 3-4 
6-7 diam. 
figures are the 0: 
400-600 X 6-15 
20-30 
12-19 
20 
30-35 
16-30 
24 
20-35 
-24 
22-24 
10-12 
10-12 
10-12 
* 
ily clue 
25-36 
* 
* 
57x2.5 
8-14 long 
* 
5-6 long 
3-6 long 
-6 long 
10x4-4.5 
3-4 X 2.5 
-8.5 X 2.5 
3x1? 
* 
I to identit 
-5 long 
2- 2.5 
3- 4-2 
2-4-3-5 
2-3x2 
2- 5 
3 ave. 
* 
2-4-3 
3- 4 
■ -3 
-3 
-I? 
-3-5 
y- 
-2.8 
* No information. 
t All measurements given are in micromillimeters. 
