THE ENTOMOLOGIST. 87 
what proportion of sexes did the butterflies arrive? (2) Was 
the species previously indigenous to the Bermudas; and, if 
not, does the food-plant of the larve occur on the islands ? 
(8) Were the females observed to deposit any eggs? 
(4) Would the insect in the latitude of the Bermudas hyber- 
nate; and, if so, at what stage of its existence? Now, asa 
natural consequence, if Terias Lisa is not indigenous to the 
Bermudas, and its food-plant does not occur there, this vast 
flight of butterflies must have perished without providing for 
the continuance of the species. Darwinian as I am,— 
thoroughly believing in the evolution of species,—I cannot 
credit any of these interesting phenomena to “chance.” 
There must be a design in this occasional and often periodical 
migration of species, which, in regard of insects, must neces- 
sarily be, as a rule, only partial, after the manner described 
by Mr. Bates, as occurring in the Amazon region, and by 
Mr. Holdsworth, in Ceylon. There can be no doubt, I 
think, that many of our so-called species originate first by 
separations, as above alluded to, and then by the breeding 
inter se of these forced insular forms.—Henry Reeks ; 
Thruxton, March 8, 1876. 
Varieties caused by the Starving of Larve.—Mr. H. Ramsay 
Cox gives the following passage (Entom. ix. p. 58), as to 
the effect produced upon Vanessa Urtice in the imago state 
by starving the larve:—‘ The Urtice, in spite of their 
starving, came out nearly the natural size.” 1 beg to say 
that I once experienced a somewhat similar effect produced 
in the imagos of Vanessa Urtice; and a query, as to which, 
appeared in the ‘Entomologist’ (vol. v. p. 371). My expe- 
rience, however, was somewhat different from that of 
Mr. Cox, inasmuch as my specimens were very much smaller 
than the usual size, the largest measuring one inch and 
three-quarters, the smallest only one inch and five-sixteenths, 
respectively, from tip to tip of fore wings. At the time I had 
no idea of the probable cause; but from a paragraph in 
Newman’s ‘ British Butterflies’ (p. 54), being an extract from 
the ‘ Entomologist’ (vol. ii. p. 132), by Mr. J. R. S. Clifford, 
and remembering that my larve, like those of Mr. Cox, had 
been left with a short supply of food, I believe the cause of 
the small size of the imagos was attributable to the deficiency 
of food whilst in the larva state. My experience, as to the 
