504 Mr. II. Trimen on Mr. Millars Experimental 
and one half-grown larvae, and of one dried pupa and 
eight pupa-skins. 
Third Experiment. —Offspring reared from ora laid by 
one example of hiirralia mima. 
In remarkable contrast to the result just described was 
that obtained by Mr. Millar from the ova (39) laid, about" 
March 26, 1909, by a single ^ of the mirna-iorm. captured 
a day or two previously. These ova all hatched by April 3, 
and the larvae presented the same appearance, and went 
throimh the same changes after their moults as those 
above noted in the case of the larvae hatched from ova 
laid by a $ of the ^oahlbergi form ; Mr. Millar being 
unable to detect any difference whatever between the 
larvae of the two batches. With the exception of two 
killed for specimens, the whole of the larvae from the 
mima ova pupated on April 29, and of the 37 pupae 4 
died. The emergences of the perfect insects were as 
follows, viz. :— 
May 6—3 $ $ — mima-iorm. 
„ 7-2 do. 
„ 8-8 ^ 2 ? ? do. 
„ 9—4 ^ 3 ? ? do. 
„ 10-1 $ — do. 
„ 11-2?? do. 
„ 12-1 ^ — do. 
„ 13—1 ^ — do. 
14-3 ^ 1 ? do. 
„ 17—1 f 
Total, 24 ^ 9 ? mima-iorm.. 
The entire series (33) of this brood consisted of the 
mother’s form {mima) only; not a single example of either 
sex—as may be seen from the collective view of them in 
Mr. Burn’s photograph, reproduced in Plate LXIII— 
showed any divergence towards or indication of the 
characters proper to the ivahlbeopi-form.. 
In view of the almost equal emergences of both 
waldbergi and mima in the brood from eleven ova of a 
single wahlbergi, Mr. Millar exjaerienced surprise and dis¬ 
appointment at this unexpected result. On receipt of his 
accidentally very long-delayed letter of July 6, describing 
these breeding experiments, I wrote (December 31, 1909) 
