108 Dr. Arthur G. Butler 



* on 



that the two extremes belong to one species in which the 

 border of the secondaries is sometimes lightly and some- 

 times heavily marked, as in A . anacreon. As with that 

 species also there are no constant differences of pattern on 

 the under surface of the wings. 



(3). A. doubledayi, Guer. = A. dirc&a, Westw. 



Westwood's description agrees well with the insect 

 which I identified as that species, and which, I have no 

 doubt, is a seasonal form of A. doubledayi. Mr. Marshall, 

 however, when in England, informed me that he had 

 seen Westwood's type and found it identical with 

 A. caldarena, Hew. ; this was sufficient for me, and I 

 immediately altered the identification. In his paper, 

 however, Mr. Marshall speaks of Westwood's insect as a 

 seasonal form of A. caldarena, which can be hardly 

 possible, since Westwood says that it is " allied to Acr. 

 oncaea, but with a very well defined broad black apex to 

 the primaries"; this exactly tallies with the form of 

 A. doubledayi (=oncasa) which I identified. Of the latter 

 we now have additional examples linking it to typical 

 A. doubledayi beyond all question, and received in the 

 same collection with the white-banded female of that 

 species. Mr. Marshall's recently published statement 

 has made me feel that I should like personally to compare 

 Westwood's type both with A. caldarena and the form of 

 A. doubledayi with black apex. 



(4). Acrsea stenobea, Wallengr. = A. caldarena, Hew. 



Of this identification I never felt very certain, because 

 we have a wet development of A. stenobea in A. caecilia of 

 the West Coast. Both A. c&cilia and A. stenobea occur 

 rather commonly in S.-W. Africa. 



When Mr. Marshall made his remarks respecting my 

 " lamentable confusion as to what are real specific differ- 

 ences in Acraea," "the fallacy of my supposition/' etc., he 

 had not had the advantage of studying our very fine series. 

 Had he done so he would have discovered that A. lygus, 

 Druce (= albomaculata, Weym.) was a form of A. stenobea 

 varying in the direction of A. csecilia, and occurring with 

 it on the Congo. Mr. Trimen's description does not. 

 accurately describe it, inasmuch as the basal blackish 

 suffusion is more pronounced on the forewing in typical 

 A. lygus, than in any other form of that variable species, 

 A. csecilia. The examples from the " Eastern, extremity 

 of Cape Colony and Basutoland," if such examples of 



