Notes on Insects Damaging Sugar Cane in Queensland. 



Similarly, when alluding to such well known pests as the " Beetle 

 Borer " {Ehahdocncmis ohscunis), and " Army "Worm " (Cirphis uni- 

 piincta), specific characters, etc.. are omitted, as the student may. if 

 inclined, consult a mass of existing litorjiture dealing eompreliensively 

 with the subject. 



Descriptions of general colouration indicate the appearance of 

 larval, pupal, or adult forms wlien viewed with the naked eye, and are 

 purposely worded in simple language with a view to enabling cane- 

 growers to recognise specimens. 



A small glossary comprising the few technical terms made use of 

 will be found on page 43, and should prove very helpful. 



Details respecting puncturation, sculpture, scales, and the anatomy 

 of insects were for the most part observed with an ordinary pocket lens 

 of moderate power. 



I have not attempted a general treatment of the question of repres- 

 sive methods, feeling that the scope of this handbook precludes extended 

 discussion of so important a subject, and believing that it would be 

 wiser to postpone the publication of fullest information on this heading 

 until such times as it may become advisable to issue leaflets or pamphlets 

 dealing with individual species. 



All localities of infestation, unless otherwise specified, to be taken 

 as meaning Gordonvale. 



Original illustrations are by the author ; photos by the Qld. Dept, 

 of Agriculture. 



My thanks are due to Dr. A. J. Turner, Brisbane; J\Ir. A. M. Lea,. 

 South Australia ; Mr. W. J. Rainbow, F.L.S., and Mr. W. W. Froggatt, 

 F.L.S., New South Wales; and Mr. G. Lyell, of Gisborne, Victoria, for 

 the identification of several doubtful species. 



In view of the fact that our insect pests of sugar-cane include 

 representatives of several natural orders, and consequently differ greatly 

 in habits, I have thought it best to arrange them under the following- 

 five headings, one of which (Section E) has for convenience been further 

 subdivided into two classes. 



Section A — Insects boring Cane-stalk and Mid-rib of Leaf. 

 Section B — Insects eating " Sets " and Stalk below gi-oinid. 

 Section C — Insects attacking the Foliage. 

 Section D — Sap-sucking Insects. 

 Section E — Insects devouring the Roots. 



Class I. — Notably Injui-ions species. 



Class II. — Slightly Injurious species. 



