29 
two insects (a Heteromerous beetle and a Fulgorid), proved 
to be unpalatable to fowls. 
A hundred and thirty Asilid flies, from India and Ceylon, 
of which 112 have been catalogued, were presented by Col. 
J. W. Yerbury. The great majority were probably captured 
in the neighbourhood of Poona, about the year 1888, by T. B. 
Payson EES: 
The most important accession of the year has been, as in 
earlier Reports, the material of observations and experiments 
conducted by Guy A. K. Marshall, Esq., and generously 
presented by him to the University. 
In 1903, 1904 and 19¢5, Mr. Marshall has made persistent 
attempts to ascertain the nature of the physiological stimulus 
which determines one or both of the wonderful seasonal 
changes of Precis sesamus. The material of his numerous 
experiments, together with 139 wild forms captured for 
comparison with the results of artificial conditions, includes 
no less than 509 specimens. The offspring belonging to 
twelve synepigonic families have been subjected }o investiga- 
tion: in 8 cases the female parent, in 2 cases both parents 
exist in the material, and can be compared with their offspring. 
This is the first occasion on which both male and female 
parents of this species have been thus available. Furthermore, 
in all previous investigations the parent has belonged to the 
red wet-season or summer phase, but this new material 
contains an example of a blue dry-season parent with 23 
offspring,—16 belonging to the wet phase, 7 to the dry. It is 
hoped that an account of this important material will be 
published at no distant date. 
Three captured examples of Precis archesta, and 24 bred 
from captured larvae,—in 17 cases subjected to experiment. 
This interesting species has never yet been bred from a parent 
of one seasonal phase to offspring of the other. While this 
still remains to be done in P. archesia, another species has 
now for the first time yielded to Mr. -Marshall’s efforts. 
I refer to Precis ceryne, of which a wet phase parent with its 
8 dry phase offspring is now added to the Hope Collection. 
