W. BOWATER 



309 



(6) This species stands close breeding well and inbreeding fairly 

 well, though in many of the families which died out the cause seemed 

 to be inbreeding. 



Genealogical Table. 0. bidentata. 



1907 



Wild M T 



"V 



1908 



Mmy. Mm 



1909 



MM+Mm+T 



MM+Mm+T 



11 n 11.15 11 4 11.13 U 9 11.1 11.12 



MM -t Aim rnUMm MmMmAlmt T T T 



1912 



11.11 



'"----/ Middleaboro 



1123 115 11.24 



12.34 1231 



Mill. Mm +T 



12.20 



Mm+T 



15 46 12.26C ■. .,,, mC „ 12 12 „ 



T Mm + r ^^+ ^" + '^ Mm i /• "," 



12.33 12-39 f'2 2« '"'" 



MM+ Mm\Mm + T Mm 4- T 

 + T j 



Thus each of the 50 families (48 bred from ova) falls under one or 

 other of the following well-known Meudelian formulae : 

 If MM = homozygous melanic, 



M^n = heterozygous melanic, 

 mm = type, 

 then MM x MWI = MM (A) 



MM X i¥m = AIM + Mm (B) 



MMxmm = Mm (C) 



Mm X Mm = MM + Mm + mM + mm (D) 

 Mm X mm = Mm + mm (E) 



and mm x mm = mm (F) 



I feel that the foregoing is sufficient evidence to prove, that in 

 Odontopera bidentata, melanism follows Mendelian rules and is dominant. 

 Journ. of Gen. iii il 



