OF INJURIOUS INSECTS. 
19 
may be brought round by such liquid stimulants as will drive on 
growth luxuriantly, the improvement in this case being apparently 
only from the nature of the plant juices, as the rapid succession of 
generations of Aphides would, if their pasturage suited, keep pace with 
its increase. The frequent coincidence of Turnip Fly with drought is 
another instance of the same principle, and how far it may go would 
be well worth knowing practically. 
The abnormal presence or absence of insects is a point on which 
the notes of the Colias Edusa for this year may throw light in the 
coming season. The remarkable difference in quantity of the sexes 
observed at various stations may be followed by coincident variety of 
appearance next year; and the death of the larvae on Clover, although 
one of the plants that the Colias mainly affects, is another interesting 
point. 
The special injury caused by insects not usually hurtful, being 
rendered so by their multiplication, is also illustrated this year by the 
many acres of Mustard and Turnips, in Cambridgeshire, which have 
been destroyed by the Phcedon betid ®, a clirysomelideous beetle, 
abundant on cruciferous plants, but not generally destructive. 
Any notes of insect presence or absence, with their coincidences, 
will be of service; and observers are requested to forward any 
observations they will be good enough to take, either as they occur or 
during October, to the Rev. T. A. Preston, The Green, Marlborough, 
Wilts ; or to E. A. Fitch, Esq., Maldon, Essex; who will be happy to 
give every information in their power. The sheets for entry of 
Observations, and pamphlet of notes for observers of Injurious 
Insects, will also be sent by them on application; or by Mr. T. P. 
Newman, 32, Botolph Lane, Eastclieap, London, E.C.; and I may be 
permitted to add that though, from having for many years devoted 
myself especially to the study of Economic Entomology in its 
practical bearings, the notes have this year been placed in my hands 
for arrangement, yet it would give me great pleasure should any more 
skilled observer come forward to aid in what is a matter of great 
utility to us all. 
E. A. ORMEROD. 
Dunster Lodge, near Islewortii, 
London, December , 1877. 
T. P. NEWMAN, PRINTER, - 
’> 2 , BOToLPII LANE, EASTCHEAP, LONDON, E.C. 
