Ivii 



30° 5' E. and 0° 45' N. The forest was the extreme eastern 

 edge of the great Congo Forest which stretches westward to the 

 sea, and was of much interest in that it afforded the passage 

 between the typical conditions in that great Sub-region (the 

 2nd or West African of Wallace) and the open country and 

 scattered forests of Uganda. 



A collection made by Dr. S. A. Neave in this locality, 

 November 3-7 (Dry Season), 1911, showed that there was 

 a most interesting transition between some of the West 

 African butterflies and their Uganda races, and it was con- 

 fidently believed that the locality would well repay further 

 study, especially if undertaken in the Wet Season. The 

 weather on the selected dates — July 21 to 31 — was un- 

 fortunately too wet and collecting was much hindered by 

 rain and clouds. The expenses were defrayed from a fund 

 for the study of evolution presented to the University of 

 Oxford in Prof. Poulton's name by his friend Prof. James 

 Mark Baldwin. 



1. Pseitdopontia and the Piermes associated with it in the 

 Seniliki Valley. — The collection contained 39 examples of 

 Pseudoponfia, while Mr. Wiggins's and Dr. Carpenter's letters 

 told something of its habits and appearance in life. 



Bearing in mind the wide differences of opinion concerning 

 this remarkable insect — formerly considered by British 

 entomologists to be a moth, by certain authorities to be 

 altogether outside the Lepidoptera, and by Aurivillius to 

 belong to " the most peculiar of all known genera of butter- 

 flies " (Seitz's " Macrolepidoptera," xiii, p. 30) — it seemed 

 well to publish these recent observations as soon as possible, 

 together with any further results which might be yielded by 

 the study of the specimens. 



Dr. S. A. Neave, Dr. R. J. Tillyard (who, on his visit to 

 this country in 1920, had been persuaded to take material 

 for examination), Dr. F. A. Dixey, F.R.S., and Dr. H. 

 Eltringham have kindly contributed the sections which 

 follow their names, and the results entirely support the con- 

 clusions of those naturalists who have maintained that 

 Pseudopontia is an aberrant Pierine butterfly. 



The following observations recorded in the letters referred 



