EUCAIiYPTUS TEEETICOENTS. 



a well-marked species in these pages, so far as in our present state of phytography specific 

 demarcations can be drawn. 



The timber of E. tereticornis is pronounced excellent, and seems to participate in the 

 durability and general qualities of that of TTfostrata; where not required for the more important 

 purposes of building material, naval structures, railway ties, cartwrights' work, implements or 

 telegraph poles, the wood of this tree comes largely into consumption for fencing and superior fael. 



E. tereticornis as well as E. rostrata and perhaps some other species become sometimes 

 destroyed over extensive areas by a Phasmatideous insect, which, when occasionally developing in 

 vast numbers, devours the foliage of these trees so completely as to cause them to die off. The 

 honorable W. McLeay has ia the proceedings of the Linnean Society of New South Wales in 1881 

 referred this insect to Podocanthus, and described this destructive creature as P. Wilkinsoni, it 

 having been brought first under scientific knowledge by C. S. Wilkinson, the Government 

 Geologist of New South Wales. By lighting smoky fires under the infested trees, perhaps the 

 Podocanthus may become timely destroyed, especially in the pupa-state. Mr. Wilkinson (ia a 

 letter to the author) states, that the Podocanthus attacked various Eucalypts indiscriminately, 

 Mr. A. W. Howitt found in Gippsland E. tereticornis and E. rostrata also sometimes succumbing 

 by loss of leaves through insects, but in these instances it was the caterpillar of an arctiidous moth, 

 which caused the mischief, the insect (in the opinion of Mr. McLeay, who however only saw the 

 larva) being allied to Orgyia. The name given by the aborigines in the northern part of New 

 South Wales to E. tereticornis is " Mungurra," according to Mr. Ch. Fawcett, while the natives 

 in the middle regions of Queensland call it " ArangnuUa " according to Mr. P. O'Shanesy. 



Explanation of Analytic Details. — 1, imexpanded flower, the lid lifted ; 2, longitudinal section of an unex- 

 panded flower ; 3, some stamens expanded ; 4 and 5, front- and back- view of an anther with part of the filament ; 6, style 

 and stigma ; 7 and 8, longitudinal and transverse section of a fruit ; 9 and 10, fertile and sterile seeds ; 11, portion of a 

 leaf ; all figures magnified, but to various extent. 



