...By spring or early summer the grub is fullgrown and forces its way out of the skin, falling to the ground, into which itburrows for a short distance and transforms into the pupal stage... 
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Cephalotheca: the head covering in the pupal stage...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Dehiscence: the splitting of the pupal integument inthe emergence of the adult in Lepidoptera...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Holometabolous: having a complete transformation; withegg, larval, pupal and adult stages distinctly separated...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Mesothoracotheca: the pupal covering of themeso-thorax...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Neanic: referring to the pupal stage...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Nymph: the larval stage of insects with incompletemetamorphosis: applies also to their pupal stage, and sometimesused as = pupa...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Sub-nymph: applied to the resting or pupal stage offemale Coccidae; also to a supernumerary stage before theformation of the pupa, and thus = pseudo-pupa...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Just before frost thelast caterpillars search for protectedplaces where they pass to the pupal orresting stage for the winter...
Leonard Haseman 「An Elementary Study of Insects」
...Watch the miller escape fromthe pupal case and describe it...
Leonard Haseman 「An Elementary Study of Insects」
...The pupal cuticle has to be shed for the emergence of theimago, but the pupa is already a somewhat reduced model of the finalinstar, with abbreviated wings and doubled-up legs...
Geo. H. Carpenter 「The Life-Story of Insects」
...' The walls of the fine air-tubes that pass into thegills are specially strengthened, but just below the pupal cuticle thesewalls are exceedingly thin and delicate...
Geo. H. Carpenter 「The Life-Story of Insects」
...Those Diptera in which the pupal cuticlesplits in the normal, longitudinal manner are included in theOrthorrhapha (see )...
Geo. H. Carpenter 「The Life-Story of Insects」
...Such an early pupal instar has been defined as a 'pro-nymph' or a'semi-pupa...
Geo. H. Carpenter 「The Life-Story of Insects」
...The pupal duration could not bedetermined closer than ten days, and this may be the usual length of time requiredfor this stage...
Horace Gunthorp 「Journal of Entomology and Zoology」
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