“Ghe Cane Grubs of Australia. 
By A. A. GIRAULT and A. P. DODD. 
The following are preliminary results of the investigations on 
Scarabeid larve injuring sugar-cane commenced by the Queensland 
Government late in 1911 :— 
Part I,—Descriptive Matter. 
THE descriptions of the larvee have been made with a half-inch Cod- 
dington lens. In all descriptions, larvee in normal position, but the head 
with the face directed dorsad. 
The descriptions of the larval stages of Anoplognathus boisduvali 
Boisd., Lepidiota albohirta Waterh., and Cacachroa decorticata Macl., 
have been offered for publication elsewhere in contributions from the 
Entomological Laboratory of this Bureau. 
In the key to the species we have endeavoured to arrange them in 
their relations to each other, eliminating at once the distinct larvee, but 
until the adults are known it cannot be ascertained how far we have 
succeeded. The numbers given are purely arbitrary (but are real 
accession numbers), serving to designate the unknown species. With 
regard to the unknown species, No. 364 is one of the dung-feeding series, 
No. 576 is possibly Horonotus optatus Sharpe, while the small related 
species (e.g., Nos. 650, 653, 587, &e¢.) are probably Haplonycha, 
Liparetrus, and other small Scarabeids. No. 89, which we have called a 
species of Lepidiota, is very possibly no such thing, and is perhaps more 
closely related to Anoplognathus, Calloodes, Repsimus (&e.), than to 
Lepidiota. 
All Searabeeid larve living in the soil met with by us have been 
included. The table of species should aid greatly in identifying the 
various grubs to be met with in the soils of the extreme northern cane 
regions of Queensland. It is of importance in providing a starting-point 
for future investigations, but can be improved as the latter proceed. 
Mr. A. M. Lea has identified the adults. 
DIAGNOSTIC ARRANGEMENT OF THE LARVAL. 
{1) Body short and stout, the thorax narrowed, the abdomen dorzad rising and forming 
a large hump. 
Head not narrowed ; size medium Fé ae ar Ss .. = No. 364. 
Body rarely short and stout, the thorax not narrowed, the whole body dorsad convex, 
not forming a hump .. ba O a 26 ore be so) =P) 
(2) Body widest at the thorax ; middle pair of legs somewhat longer than either first 
or third ; thoracic peritreme open along cephalic margin ; mandibles straight, 
the penicellus absent; lacinia and galea distinctly separated ; spiracles with 
an open transverse slit. 
