Entomological Society. 61 
diameter, filled with small green caterpillars, the larva of the wasp 
not being then visible; but on removing the contents of the chamber 
into a pill-box, it was discovered two days afterwards, being about 
one line long: it fed voraciously, increased in size rapidly, and on 
the fourteenth day had consumed the whole of its store of food except 
three of the caterpillars, which had been previously attacked by Ich- 
neumons, the larvee of which parasites had spun their cocoons before 
the Odynerus-larva was full-fed. The latter, after remaining quiescent 
for two more days, then spun a globular silken cocoon, within which 
it remained unchanged till the first week in the following April, 
when it cast off a thin skin and assumed the pupa state, the larva 
skin remaining attached to the anal segment. At the end of the 
third week it began to acquire some tint of its natural or perfect 
colouring, the head becoming dark-coloured, as well as the tips of 
the wings and femora; day by day it progressed in its gradual ap- 
proach to a perfect state, and on the 26th of May it became active, 
but it was two or three days before it finally took wing. The sex of the 
insect developed was male. Mr. Smith made a sketch of the larva 
in January ; it had thirteen segments and an anal tubercle, including 
the head; some hymenopterous larve have apparently fourteen, as in 
Epipone levipes, but he believes the correct number to be ten, having 
lateral spiracles; the head and following segment destitute of a spi- 
racle, as well as the anal segment, which makes up the true number 
thirteen, including the head. The larva of Osmia leucomelana would, 
if the constrictions were numbered, have fifteen segments, including 
the head; it is very deeply constricted; and without taking the 
spiracles as a guide, the number of segments would be puzzling to 
enumerate. 
~ "The larva of Osmia leucomelana after spinning its cocoon remains in 
a state of lethargy until the beginning of March, when it assumes the 
pupa state, and is afterwards about six weeks arriving at its perfect 
condition. The pupa-case spun by the larva of this species of Osmia 
closely resembles that spun by some species of fossorial Hymenoptera 
of the genus Crabro. 
“Descriptions of some new species of Halticide from the Philip- 
pine Islands.” By G.R. Waterhouse, Esq. 
July ist.—G, Newport, Esq., President, in the Chair. 
Captain Parry exhibited an interesting collection of insects received 
by him from New Zealand. Also a specimen of Sirex gigas, recently 
captured by himself at Sunning Hill. 
The President exhibited specimens of Saropoda furcata, and its 
parasite Celiorys conica, reared by himself from the nests made in 
posts at Canterbury. 
Mr. Westwood exhibited some drawings made by Dr. Templeton 
of various apterous insects of Ceylon, accompanying his memoir on 
those insects printed in that island. 
Mr. Yarrell presented a leaf of the lime-tree, thickly covered with 
small conical fleshy protuberances, apparently the result of the punc- 
ture of insects, 
