PLATE 5 
Rhagoletis pomonella 
A. —Puparium, lateral view. 
B. —Puparium, dorsal view. 
C. —Prepupa, or fourth-instar larva, exposed inside the puparium, 24 hours 
after formation of puparium. 
D. —Pupa in early part of first or cryptocephalic stage, shedding the prepupal 
cuticle over the thorax, 43 hours after formation of puparium. 
E. —The same as D, ventral view, but with puparial shell and larval pharynx 
removed, exposing a deep hole ( Atr ) in anterior end of pupa. 
F. —Final phase of cryptocephalic pupa ( Pu ) inclosed in two envelopes, the 
puparial shell (pm) and the prepupal skin (ppu) now shed over entire body, but 
with larval linings of stomodeum, proctodeum, and tracheae not yet cast out of 
body of pupa. 
EXPLANATION OF SYMBOLS 
An, anus. 
ASp, anterior larval spiracle. 
Atr, atrium, anterior part of larval pharynx resulting from involution of 
original head of larva. 
Mth, larval mouth. 
N u pronotum. 
N 2 , Mesonotum. 
o , horizontal cleavage line of puparium. 
p, circular cleavage line of puparium. 
pm, puparium. 
ppu, prepupal larva (fourth larval instar, inside of puparium). 
PSp, posterior larval spiracle. 
Pu, pupa. 
PuSp, pupal dorsal spiracle of pronotum. 
Sp , lateral spiracles, the adult system, connected with lower longitudinal 
tracheal trunks. 
tra, tracheal linings of preceding instar. 
