1973] Scriber — ■ P apilionidae 369 
1954. Evolution of feeding preferences in phytophagous insects. Evol. 
8 : 33-34. 
Ehrlich, P. R. and P. H. Raven. 
1965. Butterflies and plants: a study in coevolution. Evol. 18: 586-608. 
Emlin, J. M. 
1966. The role of time and energy in food preferences. Amer. Nat. 
100 : 611-617. 
Emmel, T. C. and J. F. Emmel. 
1969. Selection and host plant overlap in two desert Papilio butterflies. 
Ecology 50: 158-159. 
Feeny, P. P. 
1974. Biochemical coevokition between plants and their insect herbi- 
vores. In Coevolution of Animals and Plants (L. E. Gilbert and 
P. H. Raven eds.) Symp. 1 st Int. Congr. Syst. & Evol. Biol. 
Boulder, Colorado (August, 1973). Univ. Texas Press, Austin 
(in press). 
Fraenkel, G. 
1959. The raison d’etre of secondary plant substances. Science 129: 
1466-1470. 
Fruhstorter, H. 
1908. Parnassius. In (A. Seitz ed.) The Macrolepidoptera of the 
World. The Indo-Australian Rhopalocera. Alfred Kernen. Stutt- 
gart. 9: 109-112. 
Goode, J. P. 
1960. World Atlas. Espenshade, E. B. (ed.). Rand McNally Co., Chi- 
cago. 288 p. 
Grant, P. R. 
1967. Bill length variability in birds of the Tres Marias Islands, 
Mexico. Can. J. Zool. 45 : 805-815. 
Hovanitz, W. 
1958. Distribution of butterflies in the new world. In (C. L. Hubbs 
ed.) Zoogeography, (p. 321-368). Amer. Assoc. Adv. Sci. Publ. 
51. 
Igarashi, S. 
1966. Butterflies of Nepal ; Immature Stages. Special Bull. Lep. Soc. 
Japan (no. 2) 1-74. 
Janzen, D. H. 
1970. Herbivores and the number of tree species in tropical forests. 
Amer. Nat. 104: 501-528. 
Jermy, T. 
1966. Feeding inhibitors and food preferences in chewing phytophagous 
insects. Ent. Exp. et Appl. 9: 1-12. 
Jordan, K. 
1907. Papilio. In (A. Seitz ed.) The Macrolepidoptera of the World. 
The American Rhopalocera. Alfred Kernen. Stuttgart. 5: 11-45. 
1908-09. P apilionidae. In (A. Seitz ed.) The Macrolepidoptera of the 
World. The Indo-Australian Rhopalocera. Alfred Kernan. 
Stuttgart. 9: 11-109. 
Klopfer, P. H. 
1959. Environmental determinants of faunal diversity. Amer. Nat. 
93: 337-342. 
