and the Mendelian hypothesis. 531 



which I have mentioned in this paper as supported by the 

 very few successful experiments of actual inbreeding ; 

 namely, that in this species there is in general a "very 

 direct response to immediate parentage, especially if 

 black ; black x black producing black only (irrespective 

 of ancestry), red x red producing over two-thirds red, red 

 X black roughly half and half, or black slightly in the 

 ascendant" ("Trans. City Loud. Ent.Soc. for 1897-8, p. 30"; 

 of course " red " in this quotation corresponds to " purple " 

 of the present paper). If I could learn how to inbreed it 

 for a few generations with even tolerable success, I should 

 be strongly tempted to resume my experiments upon it, 

 with a view to definite biometric work ; I am decidedly of 

 opinion that with a little more practice and experience, it 

 would be possible to forecast almost exactly the percentages 

 of the two colours in a given brood of known parentage. 



TRANS. ENT. SOC. LOND. 1906. — PART IV. (jAN. 1907) 35 



