( Ixxvii ) 



2. Hypolhnnas {Eiiralia) anthedon, Boisd., and dubia, 

 Beauv. — The small family exhibited to the meeting had been 

 bred by Mr. W. A. Lam born from the eggs laid February 9, 

 1912, by a female dtobia, with a pattern somewhat transitional 

 towards that of avthedon. The parent, which wns also ex- 

 hibited, had been captured half a mile from Oni Camp on 

 February 6, and died February 11. Of the seven offspring, 

 three dubia and one anthedon emerged at about 11.30 a.m., 

 March 8, having pupated March 2 : one dubia and two 

 anthedon emerged March 10. The proportion, as nearly as 

 possible half and half, was most reasonably explained by 

 supposing that the female parent was a heterozygote and the 

 male a recessive (antliedoii). The three anthedon oifspring 

 were all typical, while the four dubia were intermediate like 

 the female parent. In order to appreciate the result it was 

 necessary to state that the ordinary heterozygote of this 

 species bore the pattern of the dominant dubia, and was not 

 intermediate. 



Further work was needed, but it appeared probable from 

 the facts at present known that the intermediate pattern, 

 which behaved in heredity just as a typical dubia, was not 

 itself cf composite origin, but rather a true intermediate which 

 threw light on the origin of the dimorphism. 



3. Amauris psijttalea, Plotz, and A. bulbifera, Grose-Smith. 

 — Examples bred by Mr. Lamborn fromtwo families of larvae 

 were exhibited and both sets showed the most perfect transi- 

 tion between these two so-called " species " which have only 

 been separated because the spots in the fore wing of one are 

 connected by a bridge in the other. Both series showed a 

 gradation fi'om the complete bridge to its entire absence. 

 One series consisted of four males and four females reared 

 from eggs seen to'be laid at 5 p.m. December 7, 19 10, in an open 

 space by a native village \\ miles E. of Oni. The eggs hatched 

 December 12, and four of the exhibited specimens pupated 

 December 25, and emerged January 4, 1911 \ the other four on 

 December 26 and January 5 respectively. The whole cycle 

 fell well within the dry season, from about November 15, 

 1910, to March 15, 1911. The other series consisted of three 

 males and one female bred from a company of larvae found 



