DYNAMICS O F FIELD POPULATION OF P I N E LOOPER
305
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Thalenhorst, W. (1939). 2. angew. Ent. 26, 185-208. Zur Biologie des Kiefernspannerparasiten Ichneumon nigritarius Grav.
Tinbcrgen, L. (1960). Archa. nkerl. Zool. 13, 265-336. ‘The natural control of insects in pinewoods I. Factors influencing the intensity of predation by songbirds.
Tinbergen, L. and Klomp, H. (1960). Arclzs. nderl. Zool. 13, 344-379. The natural
control of insects in pine woods 11. Conditions for damping of Nicholson
oscillations in parasite-host systems.
Varley, G. C. (1947). J . Anim. Ecol. 16,139-187. The natural control of population
balance in the knapweed gall-fly (Uropkoru juceufia).
Varley, G. C. (1953). Trans. 9th. Int. Co,igr. Ent. 2, 210-214. Ecological aspects
of population regulation.
Varley, G. C. and Gradwell, G. R. (1960). J . Anim. Ecol. 29, 251-273. Keyfactors in population studies.
Varley, G. C. and Gradwell, G. R. (1962). Pioc. 18th. Ant). Session Ceylon Ass.
A d o . Sci. 142-156. The interpretation of insect population changes.
Varley, G. C. and Gradwell, G. R. (1963). Proc. 16th. I ~ t t .
Coiigr. Zool. Wash. 1,
240. Predatory insects as density dependent mortality factors.
Weber, H. (1954). “Grundriss der Insektenkunde”. :ituttgart: Gustav Fischer
Verlag.
Wigglesworth, V. B. ( 1953). “The Principles of Insect Physiology”. London:
Methuen and Co.
Wilbert, H. (1962). 2. Morphol. Oekol. Tiere 50, 576-615. Uber Festlegung und
Einhaltung der mittleren Dichte von Insektenpopulationen.
Wynne-Edwards, V. C. (1962). “Animal Dispersion in Relation to Social Behaviour”. Edinburgh: Oliver and Boyd.
305
Solomon, M. E. (1949). J . Anim. Ecol. 18, 1-35. The natural control of animal
populations.
Thalenhorst, W. (1939). 2. angew. Ent. 26, 185-208. Zur Biologie des Kiefernspannerparasiten Ichneumon nigritarius Grav.
Tinbcrgen, L. (1960). Archa. nkerl. Zool. 13, 265-336. ‘The natural control of insects in pinewoods I. Factors influencing the intensity of predation by songbirds.
Tinbergen, L. and Klomp, H. (1960). Arclzs. nderl. Zool. 13, 344-379. The natural
control of insects in pine woods 11. Conditions for damping of Nicholson
oscillations in parasite-host systems.
Varley, G. C. (1947). J . Anim. Ecol. 16,139-187. The natural control of population
balance in the knapweed gall-fly (Uropkoru juceufia).
Varley, G. C. (1953). Trans. 9th. Int. Co,igr. Ent. 2, 210-214. Ecological aspects
of population regulation.
Varley, G. C. and Gradwell, G. R. (1960). J . Anim. Ecol. 29, 251-273. Keyfactors in population studies.
Varley, G. C. and Gradwell, G. R. (1962). Pioc. 18th. Ant). Session Ceylon Ass.
A d o . Sci. 142-156. The interpretation of insect population changes.
Varley, G. C. and Gradwell, G. R. (1963). Proc. 16th. I ~ t t .
Coiigr. Zool. Wash. 1,
240. Predatory insects as density dependent mortality factors.
Weber, H. (1954). “Grundriss der Insektenkunde”. :ituttgart: Gustav Fischer
Verlag.
Wigglesworth, V. B. ( 1953). “The Principles of Insect Physiology”. London:
Methuen and Co.
Wilbert, H. (1962). 2. Morphol. Oekol. Tiere 50, 576-615. Uber Festlegung und
Einhaltung der mittleren Dichte von Insektenpopulationen.
Wynne-Edwards, V. C. (1962). “Animal Dispersion in Relation to Social Behaviour”. Edinburgh: Oliver and Boyd.