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APPENDIX. 
INSECTS AND TIMBER TREES. 
PART II. 
ORDER VIII (HEMIPTERA). 
Family Coreidse (Gum Tree Bugs). 
The majority are dull-coloured insects that have no distinctive common name 
in Australia, and Mr. Froggatt proposes to call them " Gum-tree Bugs," as many typical 
forms feed upon the young shoots of Eucalypts. The genus Amorbus feeds on the foliage 
of young gum trees, and individuals of the species give out a strong odour when touched. 
SUB-ORDER HOMOPTERA. 
Family Cicadidse (Cicadas, or so-called " Locusts " of the 
Australian small boy.) 
See Froggatt, p. 346. At Part LXIII, p. 109 of the present work, Cicadas are 
dealt with at some length in connection with the Manna question. 
Family Cereopidse (Frog Hoppers). 
Froggatt, p. 355, says that the members of this family are not numerous, though 
world-wide in their distribution. Our most characteristic species belong to the genus 
Eurymcla, of which seventeen species have been enumerated from all parts of Australia. 
They lay their eggs under the bark of young gum trees, slitting it in regular rings with 
thsir stout ovipositors, and leaving a white, papery substance along the punctures. 
Many of them are much sought after by ants, which come to them for the honey-dew 
they secrete. I have referred to them at p. 112, Part LXIII of the present work, in 
connection with the Manna inquiry. 
A character has been described as follows, at my request, by Mr. E. Mackinnon. 
He has also made illustrative drawings, which have not been reproduced. 
Small tubercles appear irregularly distributed along both margins of the leaves 
of Eucalyptus nitzns. The base is approximately 1 mm. in diameter, and the centre 
of the tubercle is generally depressed and black. Microscopic examination of the 
tissue in this area and in the ordinary margin of the leaf shows that the abnormality 
is probably due to injury by some insect, as the leaf has been stimulated to produce 
