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[lxxvii 

 'l. Hypolimnae [Eurolia) anthedon, Uoisd., and dubia, 

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

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

 I'M J, by a female dubia, with a pattern somewhat transitional 

 towards that of anthedon. The parent, which was also ex- 

 hibited, had been captured half a mile from <)ni ('amp 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 : <»ne dubia and two 

 anthedon emerged March 1". 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 {anthedon). The three anthedon offspring 

 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 pittern 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 of composite origin, but rather a true intermediate which 

 threw light on the origin of the dimorphism. 



3. Amaurie psyttalea, Plotz, and A. bulbi/era, Grose-Smith. 

 — Examples bred by Mr. Lamborn from two 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 two spots in the fore wing of one are 



