THE ENTOMOLOGIST. 977 
thread, which, though composed of several threads, was 
uncommonly fine, and thinner than a hair; thus it lay, 
patiently waiting for its change. Meanwhile it curled itself 
somewhat more together, or became a little shorter and 
thicker, and the following day changed itself into a pupa.... 
Between this pupa and that of the small white butterfly there 
is likewise scarcely any difference, but the former is some- 
what more yellowish and !ess speckled than the latter. In the 
course of eight days our pupa changed in colour, and was 
strikingly yellower: at last the wings of the butterfly began 
actually to appear through the pupal case. 
§ 5.—Finally, after our insect had passed ten days in the 
pupal state it appeared in its last, or glorious form, being now 
a perfect butterfly, which, although it had no gleaming colours, 
charmed the eye by its beautiful whiteness, coupled with 
modest yellow, which set off strongly its black ornaments ; 
or with its wings folded over its back, with their under side 
striped with a greenish gray; which has given occasion to the 
name of the insect. I beg further to make the observation, 
that this insect is found twice a year, namely, spring and 
summer. 
The Classification of the Rhynchophorous Coleoptera.* 
By Joun L. Leconte, M.D. 
[Reprinted from the ‘ American Naturalist’ for July, 1874.] 
AT a meeting of the Academy held in Washington, 
January, 1867, I had the honour to offer some remarkst 
- upon the systematic value of the great complex of Coleopterous 
insects known as Rhynchophora. 
It was my intention, as then stated, to follow the memoir 
just mentioned with another, in which the classification of 
the Rhynchophora and separation into families should be 
discussed, in the hope of developing a more satisfactory 
system of arrangement than had been thus far obtained. 
Circumstances have prevented me from following this 
particular line of investigation, to a definite result, until 
* Read before the National Academy of Sciences, Washington, April 21, 
874, 
+ ‘Am, Jour, Science and Arts,’ xliv.; July, 1867. 
