R. K. Nabours 153 



were not bred, all show that the parents fi-oni nature were really texa- 

 nus-rufrolineatiis {AF) and texanus-luteolineatus (AE) heterozygotes, 

 respectively. Therefore, the F^ progeny should read, texanus-rufro- 

 lineatus (AF) 4 : luteolineatus-rufrolineatus (EF) 2 : texanus-luteo- 

 lineatus (AE)2 : texanus 2, the expectation being 2'25 of each (Table 

 11 (a), F,). 



(b) One of the luteolineatus-rufrolineatus (EF) Fi males (Table 

 II (o) Fi) was mated to an extracted homozygous leuconotus (B) iemale, 

 from a culture whose parents were both leuconotus-leucothorax (BC) 

 heterozygote (Table I, F^, B) and they gave F^ progeny as follows: 

 leuconotus-rufrolineatus (BF) 31 : leuconotus-luteolineatus (BE) 36, 

 the expectation being 33-5 of each kind (Table II (b), Fj). This 

 result proves unmistakably the luteolineatus-rufrolineatus (EF) hete- 

 rozygous character of the male parent, supplementing the evidence 

 which the intermediate colour of his stripe had given. 



The inbreeding of these leuconotus-rufi'olineatus (BF) and leucd- 

 notus-luteolineatus (BE) F^ individuals, respectively, gave F.. results 

 as follows : two pairs of the leuconotus-rufrolineatus (BF) individuals 

 were mated, one pair in each of two cages. The pair in cage (a) gave 

 the following F. progeny: leuconotus 27 : leuconotus-rufi-olineatus (BF) 

 69 : rufrolineatus 29; and the pair in cage (b) gave leuconotus 24: 

 leuconotus-rufrolineatus (BF)71 : rufrolineatus 30; the two pairs giving 

 totals of 51 leuconotus (B) : 140 leuconotus rufrolineatus (BF) : 59 rufro- 

 lineatus (F), with the expectation of 62'25 : 1245 : 62'25, respectively 

 (Table II (b), F,). 



One of these F2 rufrolineatus males was mated to a sister leuc(jnotus- 

 rufrolineatus female and they gave in F, 6 leuconotus-rufrolineatus : 

 5 rufrolineatus, the expectation being 5'5 of each. A pair of the F„ 

 extracted rufrolineatus were inbred and gave in F, 100 °/^ rufrolineatus. 

 These were again inbred, as a group culture, and gave in F^ 100 °/^ 

 rufrolineatus. 



Two pairs of the F^ leucondtus-luteolineatus (BE) were mated, one 

 pair in each of two cages. Pair (a) gave 32 leuconotus : 53 leuconotus- 

 luteolineatus (BE) : 17 luteolineatus, and pair- (b) produced 33 leuco- 

 notus : 48 leuconotus-luteolineatus : 20 luteolineatus, both cages giving 

 totals of 65 leuconotus : 101 leuconotus-luteolineatus : 37 luteolineatus, 

 the expectation being 50'75 : lOl'o : 5075, respectively (Table II (b), 



Three males and three females of these F.^ leuconotus-luteolineatus 

 (BE) individuals were inbred, as a group culture, under very unfavourable 



