PROCEEDINGS OF SCIENTIFIC SOCIETIES. 468 
of Repton, specimens of Huplectus ambiguus, Reich., showing the difference 
between this and the var. “duplo minor” described by Thomson, The 
variety exhibited, which has not been before recorded in Great Britain, was 
taken at Repton in flood refuse during the late spring. 
Miss E. A. Ormerod exhibited specimens of Calandra palmarum, for- 
warded by Mr. D’Urban, of Exeter, as examples of the injury caused by the 
so-called  cane-borers” to the sugar-canes of Demerara. One piece showed 
the commencement of the attack, ‘‘ the preparatory holes made for. it to 
insert its eggs” (as stated in observations from the colony); the second 
shows the complete destruction of the inside fibre of the cane, and in the 
third piece the cane was completely hollowed out. Miss Ormerod remarked 
that these specimens were accompanied by two living larye of the cane- 
weevil, which formed their cocoons whilst on the way, and availed themselves 
for the purpose, of the packing material; the inside of the cocoon being, as 
usual, of fine cane-fibres, but the outside consisting, in one case almost 
entirely and in the other partially, of the straw or grass (still with a few 
empty ears on it) in which the cane was packed. The difference in material 
is rather interesting, as it affords means of tracing the method of plaiting 
and arranging longitudinally as well as twisting the fibres. The pupa was 
found to be dead shortly after receipt, and was shown with the cocoon 
from which it was removed. A single specimen of lepidopterous pupa was 
also sent over, lying in the central gallery it had hollowed in a small cane- 
shoot little more than a quarter of an inch in diameter. This pupa was 
singularly active when received, moving at will for about an inch along its 
gallery ; but though placed in an evenly warm and moderately damp atmo- 
sphere, and left undisturbed, excepting occasional examination, it appeared 
to be dead. The report of the Managers of the Great Diamond Plantation 
furnishes some good notes, in few words, of the general characteristic of the 
attacks of the three Aes cane-borers :—I1st. The lepidopterous larva (pre- 
sumably of the Proceras) has only been found hitherto in growing canes and 
above ground. 2ndly. The larva of the Calandra palmarum is found in 
rotten canes ; cane tops after they are old, though still growing; and in the 
stools below ground. The cocoons in which these insects lie in the chrysalis 
state are nearly always to be found at the extremity of the cine top deepest 
in the ground = 3rdly,. The larva of the Calandra sacchari, which is distin- 
guishable from the C. palmarwm by its smaller size and colouring of dark 
brown and yellow ochre, instead of black, but similar in habits,,and in 
forming an intricate and strong cocoon woven of fibre to protect it whilst in 
the pupal state. With regard to the cutting out of infested cane, and the 
value in product paying expenses, it is noted :—‘‘ Besides burning, ja gang 
of men has been employed cutting out such young canes as show sigus of the 
attack of the insects, and these have been thrown into canals and sunk under 
water. A good many insects are killed in this way, but a great man y escape. 
