many Orthoptera high in the air. It seems, too, to be the 

 general opinion that these birds feed habitually on smaller 

 insects. However, it occurred to me to examine the excreta 

 which these birds often drop on my verandah, for there is a 

 family of them with which I am on friendly terms, and when 

 I am alone in the house they always come and very often 

 enter. These pellets do contain the scales of Lepidoptera, 

 I believe Pierine, and so I will pack these separately and 

 obtain some, as to the source of which there will be no 

 possibility of doubt, by watching the birds. 



" lAth December. — I saw to-day a black-headed yellow bird 

 take a Catopsilia and dismember it in the usual way, but I 

 only obtained a bit of wing, which shows well the beak 

 mark. It has just occurred to me that I can send you in 

 this letter a few wing fragments bearing this mark, and a 

 specimen of excreta. 



" In considering the question of bats as destroying insects 

 it has occurred to me that I might examine their excreta too, 

 so I entered a room in the house shut nearly all the time I 

 have been here and infested by the animals. Here the floor 

 is covered with their excreta, which I examined, finding 

 numerous scales of Lepidoptera, doubtless moths, a number 

 of which, for some reason or other, they must have brought 

 in, for there are on the floor many wing fragments, which I 

 am collecting, labelling both excreta and wings. 



" With further reference to the question of birds taking 

 Catopsilia, there is no dearth of other insects here, Orthoptera 

 now swarming. I saw an old man last night collecting them — 

 Locustids — which he assured me he was going to boil and eat." 



Observations on the enemies of the larvae op the 

 Pierine butterfly Catopsilia florella in East Africa. — 

 Prof. PouLTON said that he had also received the following 

 interesting notes by Mr. Lamborn : — 



'• Kuronga, 



'' I2th December, 1919. 



" I have been often going to give you a little account? 

 based on some notes made a year ago at Lindi, of the larvae 

 of C. florella and their enemies. I now append it : — • 



