THE AUSTRALIAN NATURALIST. 59 
Scale insects etc.):—lam.: Pentatomide: Humecopus aus- 
tralasiwe (large plant bug), Pofcilometrus strigatus (large plant 
bug). Fam.: Membracide: Seatius virescens (green frog 
hopper; young and adults suck sap from foliage). Seatius 
deppessus (closely allied to proceeding species). Fam. : 
Cogide : — Rhizococcus viridis; Icerya purchasi (Cottony 
Baatinn scale), Ham.: Psyllide :—Psylla accacix-dealbate, 
Froget., Psylla acacie-decurrentis, Froget., P. acacixe-baileyanae, 
Froget., P. acacie-juniperine, Froggt., P. acacize-pyenanthae, 
Froggt., P. accacie-pepdulae, Froggt., P. lidgetti, P. frenchi, P. 
IP. candidgP, gracilfis. 
Hynenoprera: Fam.: Megalyridae: Megalyra spp. 
REVIEW. 
“THE PINES OF AUSTRALIA,” 
By lh. T. Baker, F.L.S., and H. G. Smith, F.C.S., Sydney, 
Government Printer, 1910. 
Tuis beautiful volume is a worthy sequel to: ‘‘A Research 
on the Kucalypts,’’ by the same authors, published in 1902. 
The arrangement of the present volume is on similar lines 
to that on the Eucalypts, there being first of all a general 
summary and historic statement followed by a detailed account 
of the different species dealt with. Near the beginning of 
the volume the authors give a useful summary of conclusions 
which forms an excellent introduction, bringing out the main 
points arrived at in the research and leading the way to a 
good understanding of the work and its scope. 
Callitris, in the able hands of the authors, proves to be a 
wonderful genus, quite a classic in its way, and certainly 
equal in interest to the Eucalypts themselves. 
It is extremely interesting to see how the results of the 
chemical examination of the oils yielded by the various spe- 
cies of pines, leads to a system of classification based on well- 
marked morphological characters of the leaves as was first 
shown by the authors to be the case with the Eucalypts, and 
how different also in many cases are the oils yielded by the 
leaves and fruits of the same tree. 
A very striking feature of the research is that the com- 
plete examination which the authors have made has led them 
to restore many species established by Robert Brown and 
Allan Cunningham, which had been suppressed on purely 
morphological grounds by subsequent workers. What a tribute 
is this to the insight and ability of these grand old botanists! 
The results of this investigation lead not only to a clearer 
differentiation of species but also of Genera. 
