1. Tropane and pyrrolizidine alkaloids in the ithomiinesPlacidula euryanassa andMiraleria cymothoe (Lepidoptera: Nymphalidae)

   • André V. L. Freitas
   • José Roberto Trigo
   • Lauro E. S. Barata

   Research papers Pages: 61 - 67

2. Sequestration of pyrrolizidine alkaloids by larvae ofTellervo zoilus (Lepidoptera: Ithomiinae) and their role in the chemical protection of adults against the spiderNephila maculata (Araneidae)

   • Albert G. Orr
   • José Roberto Trigo
   • Thomas Hartmann

   Research papers Pages: 68 - 73

3. Egg protein insolubility inLymantria dispar versus other forest Lepidoptera

   • MaryCarol Rossiter
   • Diana Cox-Foster
   • Diane Bergeron

   Research papers Pages: 74 - 84

4. Species-specificity in trail pheromones and Dufour's gland contents ofCamponotus atriceps andC. floridanus (Hymenoptera: Formicidae)

   • U. Haak
   • B. Hölldobler
   • F. Kern

   Research papers Pages: 85 - 93

5. Performance of first instarChrysophtharta bimaculata larvae (Coleoptera: Chrysomelidae) on nine families ofEucalyptus regnans (Myrtaceae)

   • Kathryn C. Patterson
   • Anthony R. Clarke
   • Myron P. Zalucki

   Research papers Pages: 94 - 106

6. Species, population and individual specific odors in urine of mole rats (Spalax ehrenbergi) detected by laboratory rats

   • Giora Heth
   • Gary K. Beauchamp
   • Kunio Yamazaki

   Research papers Pages: 107 - 111

7. Population dynamics of beech scale (Cryptococcus fagisuga) (Coccina, Pseudococcidae) related to physiological defence reactions of attacked beech trees (Fagus sylvatica)

   • Vincenz Gora
   • Jürgen König
   • Jörg Lunderstädt

   Research papers Pages: 112 - 120