( Ivi ) 



I am sure outnumber all the species of Neptis put together 

 at any season. I have not takeu any more because I thought 

 I had probably sent enough." 



EURYTELA HiARBAS AND E. DrYOPE. ProfesSOr PoULTON 



said that his friend Mr. Roland Trimen, E.R.S., had pointed 

 out to him that Mr. Lamborn's i-esults published in these 

 Proceedings (1912, p. xviii) are "confirmatory of Miss Foun- 

 taine's experience in Natal, given in Trans. Ent. Soc. Lond., 

 1911, p. 59. She records that although she had bred both 

 forms indiscriminately from every variety of the larva, she 

 nevertheless found that ' the ova laid by E. hiarhas always 

 produced Marbas, whereas those of a dryo-pe 5 invaiiably 

 produced dry ope.' " 



Paper. 

 The following Paper was read : — 



" On the Colour-Groups of the Hawaiian Wasps," by Dr. 

 K C. L. Perkins, M.A., D.Sc, F.Z.S., F.E.S. 



Prof. PoULTON, in introducing the paj)er, said that Dr. 

 R. C. L. Perkins had illuminated a problem of the most 

 fundamental interest and importance for the student of 

 evolution. His work was of equal interest to the follower 

 of systematics and of bionomics. 



Dr. Perkins had inferred that the 102 species of Odynerus, 

 the only indigenous wasps of the islands, had been derived 

 from the ancient immigration from some unknown country, of 

 a single yellow-banded species, and from the much later but 

 still very ancient immigration of a single dark Asiatic species 

 allied to 0. nigriiJenms, Holmgr. The latter l)ecame extremely 

 dominant, but it found the islands already occupied and only 

 produced a group of 4 allied species, as against the 3 genera, 

 the important structural groups and the 98 species which 

 Dr. Perkins recognised in the descendants of the original 

 immigrant. All the species attacked the larvae of Lepido- 

 ptera, and the immigration of these must of course have 

 preceded the advent of the earliest ancestor of Odynerus. 



Dr. Perkins showed in his paper how the 102 species had 

 formed Colour-groups in which the constituent members were 

 associated quite independently of affinity. Thus the species 



