Notes on Habits and Metamorphosis of Lepidiota frenchi, Black. 13 
POINTS OF DISTINCTION BETWEEN LEPIDIOTA FRENCHI 
(BLACK.) AND LEPIDIOTA No. 683. 
THE LARVA. 
(1) Sete on venter of anal segment of frenchi arranged as in Fig. 
17; but those of Z. No. 683 disposed as shown in Fig. 18. 
(2) Width of head in frenchi, 5 mm.; in No. 683, 7-20 mm. 
THE BEETLE, 
(3) Average length of adult frenchi, 24 mm. (nearly 1 inch) ; but of 
No. 683, 28-50 mm. (114 inches). 
hk 
(4) Colour of dorsal surface of prothorax and basal area of elytra 
in No, 683 very dark-brown, nearly black, shading into reddish-brown 
just beyond scutellum; the entire upper surface of body in frenchi is 
uniform reddish-brown. 
(5) Antennal joints Nos. 6 and 7 in male of No. 683 stouter than 
in female; and club of same distinctly longer, in proportion to that of 
female of this species, than in french. 
(6) Teeth on outer edge of front tibiwe of frenchi sub-acute with the 
points about equi-distant (Fig. 25); in No. 683 the points are decidedly 
obtuse and not equi-distant (Fig. 26). 
(7) Spur near distal end of front tibia in frenchi usually tapering 
eradually from the base to a sharp point; in No. 683 this spur is propor- 
tionately thicker and not slender near the point. 
(8) The ventral transverse bands of white scales on abdominal seg- 
ments 1 to 4in No. 683 (Fig. 27) are much narrower on central area than 
in frenchi, which, although a smaller insect, has them nearly the width of 
these segments (compare Figs. 27 and 25). 
CONTROL MEASURES. 
Up to the present no experimentation in this connection has been 
attempted at Gordonvale, although from time to time the writer has 
emphasised the advisability of preventing as far as possible the infestation 
of plantations bordering virgin forest land, 
As already stated, the lfe-cycle of frenchi (from egg to perfect 
insect) occupies a period of two years; whilst that of albohirta is com- 
pleted in twelve months. 
Although both beetles oviposit during December or January, the 
grubs of the latter species attain full growth in a space of about six 
months (January to June), pupating, as a rule, from July to September ; 
whereas those of frenchi, which mature very slowly, remain in the larval 
