May, 1927 
The Queensland Naturalist. 
33 
places the divides have been reduced to 1 low gaps, as at 
Canungra. 
These five streams, with their branches, rising close 
together, but gradually diverging, with the exception of 
the Albert and Canungra, keep separate courses to the 
sea, the Albert only joining the Logan at their combined 
estuary. Each stream exhibits varying characters in its 
course, associated with changes in the rock structure, but 
in their uppermost parts at least they evidently form one 
group of streams previously situated on the top of a 
basaltic plateau, but now in deep valleys of their own 
carving. Possibly a study of this group of streams may 
help us to form some idea of the former extent of the 
basalt. 
There are other less notable features of our local 
streams of which mention might be made, but more would 
certainly weary (if you are not already fatigued) - 
Enough has, I hope, been said to show that much informa- 
tion may be obtained, and not a little pleasure from their 
study. 
0 
BRISBANE BUTTERFLIES OF THE FAMILY 
PAPILIONIDAE. 
A general account of these insects, as observed in 
the gardens and streets of Brisbane and its vicinity, with 
notes on food plants, both native and introduced. 
(By R, Illidge.) 
SERIES I. 
These notes on the butterflies of the family Papil- 
ionidae are intended more for junior members of the 
F.N.C., but we hope also to interest others in these 
beautiful insects. They are figured separately, and 
treated popularly, the descriptions being made as short 
as possible, reliance being placed more on the plates for 
their identification. For those who desire a more advanc- 
ed knowledge of our Australian butterflies, I cannot do 
better than refer them to “The Butterflies of Australia, ” 
by Waterhouse and Lyell. Herein an introduction of 
fourteen pages, containing a wonderful amount of inform- 
ation in short, terse sentences is given, followed by many 
of descriptions, illustrations, and classification of all the 
Australian butterflies, also notes upon collections and 
collecting. Most of the illustrations are from excellent 
photos, the balance consisting of several plates of figures 
accurately coloured. 
