88 The South Australian Naturalist. 



LECTURES AND EXCURSIONS 



Lecture on "Insects," September 13, 1922. — Mr. A. M. 



Lea. F.E.S.. spoke on some common insects, illustrating his 

 remarks hj excellent lantern slides. With the help of the slides 

 Mr. Lea explained the differences between flies, beetles, bugs, 

 ants, locusts, grasshoppers, dragon flies, thrips, and root mites. 

 The lecturer dealt with many of the most destructive insect 

 pests which do so much to destroy the fruit and vegetable 

 crops, such as the wheat and flour weevils and beetles, the 

 shothole borers, leaf-cutting bees, tomato flies, aphides, and 

 various scale insects. 



Mr. Elston dealt with the peculiar digestive organs of 

 insects. By means of diagrams the lecturer showed the 

 various parts of the mouth, mandibles, and jaws of different 

 classes of insects. 



Various exhibits were shown by members. Miss Roeger 

 showed pupa case of a cup nioth, galls, and jack-in-the-box 

 pupa case. 



Mr. Kimber showed a piece of a bone of the extinct m<> 

 of New Zealand. 



Mr. J. F. Bailey showed eleven species of native flowers 

 in bloom, including four species of wattle, guinea flower, desert 

 cassia, Geraldton wax. flower, and needlebush. 



Mr. E. H. Ising showed varnished wattle from Mount Lofty 

 and a sf»pcim.en of turnery in black oak from Morgan. 



Lecturettes, ' ' Botany for Beginners ' ' and ' * Our Wattles, ' ' 

 October 24, 1922. — At the evening meeting on October 24, in 

 addition to the lecture of Mr. J. M. Black, we were favored 

 with a lecture (illustrated by some remarkably good slides) 

 by Mr. A. J. Campbell, an ornithologist from Melbourne, visit- 

 ing Adelaide to take part in the Ornithological Camp at 

 Blount Remarkable. 



Mr. Black illustrated his short lecture by drawings and 

 specimens shown by means of the episcope. The drawings 

 were specially prepared and colored by the lecturer, whose 

 artistic work is well known to botanists. Drawings showed 

 various parts of the bud, flower, and fruit and their develop- 

 ment in each plant. Mr. Black took three widely differing 

 families for illustration, the mallows, goodenias. and the 

 grasses. Taking a well-known specimen of each class the 

 lecturer showed the parts, their development, and the signi- 

 ficance of each part for classification. 



