Hybridising T. bistortata and T. crepuscularia 31 
Mr. Bacot’s EXPERIMENTS (Continued). 
Tn addition to the first crosses already summarised, Mr. 
Bacot obtained the following more or less fertile cross- 
ings of the various hybrids reared from the already- 
described broods. 
(1). 2 (f T.ab.delamerensis x 2 T. bistortata) x 2 (fg 
T. bostortata x 2 TL. ecrepuscularia). Two pairings: a. 
June 10th. @. August 6th. 
(2). & (gf T. ab. delamerensis x § T. bistortata) x 
(f Tf. bistortata x 2 T. ab. delamerensis). Two pairings 
on June 10th. (Eggs mostly infertile.) 
(3). 6 (gf TL. bistortata x 9 T. crepuscularia) x 2 (fg 
T. lustortata x T. ab. delamerensis). Paired June 11th. 
He further obtained the following inbred pairings. 
(4). ¢ (gh T. bistortata x 2 T. crepuscularia) x 2 (of 
T. bistortata x 9 T. crepuscularia). Four pairings: a. 
June 10th. 8. Junel0th. y. Junel4th. 6. June 17th. 
(A large percentage of the eggs infertile.) « 
(5). ¢ (ST. bistortata x 9 T. ab. delamerensis) x & 
(fT. bistortata x 2 T. ab. delamerensis). One pairing, 
June 13th. 
The following pairings of a hybrid with one of the 
parent species were also obtained :— 
(6). ¢ (gf T. ab. delamerensis x 2 T. bistortata) x 
T. bistortata (second brood). Paired June 15th. Only 
one or two ova hatched, remainder infertile. 
(7). 2 T. crepuscularia (second brood) x 2 (f T. bistor- 
tata x 2 T. ab. delamerensis). Paired July 4th. 
The following crosses entirely failed :—(1) #(f T. 
bistortata x 9 T.ab.delamerensis) x 2 (af T. bistortata x 
2 LT. ab. delamerensis). Paired June 12th. (2) Z (2 
T. bistortata x 2 T.ab.delamerensis) x 2 (gf T. bistortata 
x 2 T. crepuscularia). Paired June 14th. (3) #( 2% 7. 
ab. delamerensis x 2 T. bistortata) x 2 (¢ T. bistortata 
x 2 T. crepuscularia). 
Vi.—InpreD Hysrips—a. f(f 7. bistortata x 2 
T. crepuscularia) x @ (T. bistortata fg x T. crepuscularia 
2 ).—Both parents came from Mr. Bacot’s Batch IIIa. 
The parents are normal for that brood. Pairing took 
place June 17th, 1897; 22 imagines examined, 12 f and 
10 2 ; these emerged between the middle of August and 
end of October. 
