130 THE AUSTRALIAN NATURALIST. 
leaves of a giant sedge Cladium jamaicense were preserved for 
a lengthy period in a suitable condition for feeding larve, and 
exhibited some excellent photos of the typical aquatic flora of 
Duck River taken on the monthly excursion. 
An example of fasciation in Scaevola hispida was exhibited 
on behalf of Mr. M. S. Barnett. by the Hon. Secretary. This 
abnormality has not, as far as can be ascertained, been pre- 
viously noted in the genus. Mounted leaves of the Chestnut, 
Wistaria, Honeysuckle, and Hazel-nut, were exhibited to illus- 
trate notes on leaf-cutting bees by Miss Mabel N. Brewster. 
Miss A. A. Brewster gave an interesting account of the pol- 
lination of the Geebung Persoonia lanceolata. Observations 
covering a number of years were explained in detail, and the 
subject was illustrated by a fine series of coloured drawings 
~ depicting the most important features referred to in this com- 
prehensive study. A micro-slide of the leg of the andrenid 
dee which pollinates the “Geebung,”’ and a wingless bush cockroach 
with an egg-mass attached to its abdomen, were also exhibited. 
Mr. EH. Cheel delivered a lecture on “Plants which Produce 
Manna.” ‘The historical aspect of the subject was exhaustively 
treated, especially in Scriptural times, and the careful research 
methods characteristic of the lecturer were strongly in evidence. 
Mr. Cheel closed with the novel suggestion, supported by his 
personal observations, that the manna which he obtained from 
Eucalyptus Smithii and Eue. citriodora is the product of the 
larvee of a Cup-moth which feeds on the leaves. The insect 
disgorges a portion of the partly assimilated food as a watery 
fluid which coagulates into the white granular mass known as 
manna. 
In proposing a vote of thanks to the lecturer, Mr. A. G. 
Hamilton offered some pertinent remarks on various insects 
more ‘or less directly concerned with the production of manna. 
Miss A. A. Brewster—who seconded the proposal—drew at- 
tention to the intimate relationship of the insects mentioned 
most of which have adopted a biting or sucking habit when 
feeding. The vote -of thanks to the lecturer was carried by 
acclamation. 
ERRATUM. 
Presidential Address, Aust. Nat., Jany., 1920, p. 115, 2nd 
line from bottom should be 16th from bottom. 
