14 Notes on Habits and Metamorphosis of Lepidiota frenchi, Black. 
stage for fully a year longer, thus accounting for the biennial occurrence 
during April and May of large and comparatively small grubs in the 
same furrow, the former larve being, of course, those of Stage III. 
albohirta. and the small ones Stage Il. frencht. Fully grown grubs of 
frenchi, on the other hand, are often mistaken by growers for those of our 
erey-back cockchatfer. 
The former insect generally oviposits in unbroken soil densely 
covered by grass, weeds, &e.; and this being so, growers would do well to 
maintain throughout December and January a system of clean culture on 
areas devoted to cane, and more particularly on fallow land reserved for 
the planting of an early crop. 
Both frenchi and albohiria lay their eggs during these months, and 
are strongly attracted by a luxuriant growth of vegetation between the 
rows, so that weedy canefields are almost sure to become badly infested. 
Frenchi usually oviposits freely in such situations, with the result 
that in April or May, when the ground is planted with an early crop, the 
erubs from these eggs, being then about five months old and stil] small, 
are very liable to be overlooked and allowed to remain in the soil. As a 
matter of fact, however, these Stage Il. larve have still about a year to 
pass before pupating, during which period they are capable of working 
considerable injury ; moreover, after such infested land has been planted 
and the weeds destroyed they are necessarily obliged to subsist almost 
entirely on the roots of the cane. 
Unlike albohirta, this species does not appear to be strongly attracted 
by artificial light, although, whilst experimenting in a canefield last 
December (1916), no less than 20 specimens of french: flew into a trap 
lit by an acetylene lamp between the hours of 7.35 and 8.30 p.m., the 
temperature at the time being 76 degrees F. 
ANTHONY JAMES CUMMING, Government Printer, Brisbane. 
