:;2s 



THE AMEBIC AN NATURALIST [ Vol. XLVII 



are classified as tricolor reds ; 403, 404, 410, 411, 413, 414, 7 

 are classified as tricolor black, while No. 409 is classified 

 as bicolor black. 



Of these offspring only one is classified as bicolor, and 

 she (409) has a trace of red on her right front leg (see 

 diagram). 



The next step was to mate, inter se, the tricolor blacks 

 and the tricolor reds. For instance, 410 ? mated to 414 c? 

 (both tricolor black) gave five tricolor blacks, 464, 465, 

 466, 507, 508, and three bicolor blacks— 463, 475, 476. It 

 is clear, in this instance, that tricolor blacks tended to 

 produce the same color, i. e., tricolor blacks. 



Again, tricolor black 403c? and 404? (she may be 413), 

 gave three tricolor blacks, 419, 420 and 428, and three 

 intermediates, 421, 422 and 430, and four bicolor blacks, 

 418, 423, 424, 429. Four of these bicolor blacks have a 

 trace of red. 



No. 414c? bred to 413? produced eight tricolor blacks: 

 452, 453, 490, 491, 439, 514, 515, 517; one intermediate, 

 516; one bicolor black, 513; two tricolor reds, 488 and 

 489. In this case the tricolor blacks gave two tricolor 

 reds. 



Tricolor Red* 

 Tricolor red 408? by 406 c? gave one intermediate, 442; 

 two bicolor reds, 441 and 442 A. There was present with 

 this female at birth of the next litter, another, viz., 412 c?, 

 which, however, probably was not concerned in its pa- 

 rentage. The offspring were one tricolor black, 493; 

 two bicolor black, 494, 495, and one tricolor red, 492. 



Bicolor Blacks 

 No. 409 ? (note red on leg) was mated to 520 <? and gave 

 one intermediate, 554; two bicolor blacks, 552, 553 (red- 

 dish spot on left shoulder). 



• The labels of 404, 410 and 413 were lost and thus the diagrams confused 



8 Many of the tricolor reds contained much white and thus may have had 

 more potential black, lying beneath the white, than was patent. 



