( cvi ) 



larval stage of growth. The conclusions foreshadowed by Mr. 

 Marshall's earlier experiments with T. omphale (Trans. Ent. 

 Soc. Lond., 1902, pp. 211-213) were thus fully confirmed and 

 amplified. These facts appeared to be of so much interest as 

 to justify their immediate communication to the Society ; he 

 hoped before long to be in a position to present the results of 

 a further examination of Mr. Marshall's valuable material. 



Mr. G. A. K. Marshall said that his experiments showed that 

 the larval period, especially in its later stages, was in Teracolus 

 the period in which the insect was most sensitive to the 

 above influence ; the pupa stage, which was the most sensitive 

 stage in Precis, being almost insensitive. 



The President drew attention to the exti-eme interest of 

 these experiments, and congratulated Mr. Marshall on the 

 success which had attended his reseai-ches, conducted as they 

 were under great difficulties in Central South Africa. 



Papers. 



Mr. Louis Beethoven Prout read a paper entitled 

 " Xanthorhoii ferriigata, Clerck, and the Mendelian 

 Hypothesis." 



Dr. Frederick Augustus Dixey, M. A., M.D., communicated 

 a paper "On the Diaposematic Resemblance between Hi(,])hina 

 corva, Wallace, and Ixias hcdiensis, Fruhst." 



