lxix 
bringing them into action he did not at present understand. 
They gave off no appreciable odour, and their effect on the 
enemy would seem to be through its sense of taste rather 
than its sense of smell. 
Mr. C. B. Wittiams in commenting on this exhibit said 
that he had found P. viminalis to be viviparous. 
British Hymenoprera—The Rev. F. D. Morice 
exhibited :— 
A 3 of the sawfly Tenthredopsis palmata Geofir., with a 
second transverse nerve abnormally present in the radial cell 
of its right fore-wing. This seemed to be a case of “ rever- 
sion,” such a nerve being believed to have been present in the 
original ancestors of this group, though it occurs normally only 
in one small and very peculiar division of it, viz. the Xyelini. 
The specimen was taken (or bred?) by the Rev. W. J. 
Johnson recently at Poyntzpass, Co. Armagh, Ireland. 
A 3 of Lasius (= Anthophora) pilipes, which he saw in his 
garden, a few weeks ago, making repeated and violent attempts 
to seize (and pair with?) a 2 of the Humble Bee Bombus pra- 
torum. In most years $d and 99° of pilipes are exceedingly 
common at Woking, as they are almost everywhere, in all 
months of the spring. But this year Mr. Morice had seen 
only a very few gd, and not a single 2 either in his garden 
or elsewhere. 
Mr. Morice exhibited also a 2 of pratorum, and the real 
female of L. pilipes. It was seen that they differed very 
considerably in colour as well as in structure ! 
Mr. Morice stated that Dr. R. C. L. Perkins had told him 
that he had seen pilipes 3 behave in the same way, not only 
towards Humble Bees, but, what seemed still more curious, 
towards workers of the Hive Bee! 
PIERINES FROM CENTRAL PEru.—Dr. F. A. Drxey exhibited 
some Pierines from West Central Peru, and remarked on 
them as follows :— 
“The butterflies now exhibited, with several others, were 
all captured on the same day, May 26, 1918, by Mr. G. H. 
Bullock, near the Palea torrent, above its junction with the 
Chanchamayo river, at an elevation of about 5000 ft. The 
three specimens of Pereute, though bearing so strong a 
