32 Mr. C. F. M. Swynnerton on 



ToTANUS GLAREOLA. ( Wo0(l-Saiul[)iper.j — Not uncommon 

 at East London and Keiskama Mouth. 



Sterna cantiaca. (Sandwich-Tern.) — Common at Keis- 

 kama Mouth, Nahoon, and East London. 



Majaqueus ^quinoctialis. (Cape Hen.) — Specimens 

 observed at East London and Keiskama Mouth. 



DiOMEDEA MELANOPHRYS. (Molljmawk.) — East London. 



VI. — Birds ill Relation to their Pre tj : Kd'periments on Wood- 

 Hoopoes, Small Hornhills, and a Babhier. By C. F. M. 

 Swynnerton, F.L.S., F.E.S., C.M.B.O.U. 



The habits o£ birds in rekation to their insect-prey are of 

 much interest from an entomological point of view, owing to 

 their bearing on the subjects of insect-coloration and 

 economic entomology ; and it was in this connection that 

 I myself originally undertook the series of experiments 

 of wdiich those recorded in the present paper are a small 

 pnrt. 



It was inevitable, however, that the experiments should 

 prove highly interesting from an ornithological view-point 

 too : and I am selecting for this paper three short series 

 in i^articular that seem to me between them to illustrate 

 a number of points of ornithological interest, wdthout 

 being to any too wearisome extent mere lists of insects' 

 names. 



The Prey. — Butterflies were used mainly, but by no means 

 entirely. This was partly for convenience, partly because it 

 is this suborder of insects that has been and can be best 

 studied from the point of view of coloration. That it was 

 correct to offer butterflies to Telephonus and Lophoceros, I 

 know from having seen wild individuals of these genera 

 attacking them. I have no such definite records for Crate- 

 roptis and Irrisor, yet I cannot helji thinking that the former 



