242 STATES OF INSECTS. (Pupa.) 
I shall next advert, chiefly to the pupz of the grand 
division last described, under the distinct heads of sub- 
stance, figure, aud parts ; colour, age, sea, motions, and 
extrication of the perfect insect. 
i. As to their substance—at first interiorly all pupz 
consist of a milky fluid, in which the unformed members 
of the future perfect insect may be said to float, and in 
Lamarck divides the pup of insects that undergo a metamorphosis 
into three kinds, which he names—Chrysalis, Mumia, and Nympha. 
i. Chrysalis. Under this denomination he includes all inactive 
pup inclosed in an opaque puparium which entirely conceals them. 
These he further subdivides into two kinds. 
1. Chrysalis signata. This term is synonymous with the Pupa 
obtecta of Linné, or the Chrysalis of Lepidoptera and some Diptera. 
2. Chrysalis dolioloides. Equivalent to the Pupa coarctata Linn. 
peculiar to those Diptera that assume this state in the skin of the 
larva. 
ii. Mumia. All inactive pupe which are covered by a transparent 
skin, through which all the parts of the inclosed imago may be seen, 
subdivided also into two. 
1. Mumia coarctata. Corresponding with the Pupa incompleta 
Linn., which includes the Coleoptera and most of the Hymenoptera. 
2. Mumia pseudonympha, confined to the Pupa of the T’richoptera 
and some others. This might be named Pupa subincompleta. 
iii. Nympha. Under this denomination are included all insects 
that undergo only a partial metamorphosis, and are active in their 
pupa state, corresponding with the Pupa semicompleta Linn. and also 
subsemicompleta MacLeay. See Anim. sans Vertebr, ili. 285—. 
M. Latreille has started an ingenious idea on this subject with re- 
gard to these kinds of metamorphosis, which comprehends both larva 
and pupa under a distinct denomination : as thus— 
1, Demilarve and Deminymph, synonymous with the Semicomplete 
Metamorphosis. 
2. Larve and Nymph, answering to Incomplete Metamorphosis. 
3. Caterpillar and Chrysalis, answering to Obtected Metamorphosis, 
4, Vermi-larve and Pupda, answering to Coarctate Metamorphosis. 
N. Dict. d Hist. Nat. xvi, 272. 
