526 Rev, K. St. Aubyn Rogers' Biononiic Notes on 



Now although I have usiially found P. trimenii a rare 

 species, this is not the case at Rabai. In fact, in some 

 seasons it is more common than any other member of the 

 group with the single exception of A. natalica. It 

 frequents much the same situations as the Acrseas but its 

 flight is more lofty and sustained, and when alarmed it 

 goes off at a great rate. Still the integuments of the 

 thorax are very tough and quite different from those of 

 species which adopt a protective (cryptic) appearance. 

 Although the specimens of trimenii from British East 

 Africa differ in some details from the South African type, 

 still they always have the brilliant pink and pearly white 

 under side which at once distinguishes them from the 

 nearly allied P. hoisdnvali, Doubl., in which the corre- 

 sponding surface is ochreous. 



[Tavcta, July 5, 1905. 



Ahantis tettensis, Hopff., mimicking on the under surface 

 and at rest the pattern of the smallest Acrieas of the 

 doiihledayi type, was quite common here in the rains in 

 one place. It flies backwards and forwards with great 

 rapidity quite in the usual skipper manner, and always 

 settles with wings half-raised, so that it gives no idea of an 

 Acrosa on the wing or during the brief pauses between 

 successive flights.] 



1. Further notes on ComMnation centred hi/ large rcd-and- 

 Uach Acrssas. E. B. P. 



This group of large Acrseas also includes Acrxa chilo, 

 Godm., captured by Rev. St. Aubyn Rogers in several 

 localities. A. cistrigerci, Butl., not in his collection, but 

 sent to me by Mr. and Mrs. S. L. Hinde from Fort Hall 

 and Kitui, must also be regarded as a member, although 

 apparently much rarer than any of the others. The group 

 is I'urthermore perhaps united by its smallest members, 

 A. ijkarsalus and small individuals of A. natalica, with the 

 still smaller species, — acrita, Hewits., Irxsia, Godm., douhle- 

 dayi, Guer., and neohulc, Doubl. The following table 

 shows the numbers of specimens (with the inclusive dates) 

 at Oxford captured by Mr. St. Aubyn Rogers at various 

 localities in Briti.sh East Africa. 



