1. The evolution of cheating and selfish behavior

   • Michael J. Wade
   • Felix Breden

   OriginalPaper Pages: 167 - 172

2. Differential reproduction among female Richardson's ground squirrels and its relation to sex ratio

   • Gail R. Michener

   OriginalPaper Pages: 173 - 178

3. Aggregation and foraging behavior of whirligig beetles (Gyrinidae)

   • Bernd Heinrich
   • F. Daniel Vogt

   OriginalPaper Pages: 179 - 186

4. Defensive behavior of the black widow spider Latrodectus hesperus (Araneae: Theridiidae)

   • Richard S. Vetter

   OriginalPaper Pages: 187 - 193

5. Alarm calling behavior of the thirteen-lined ground squirrel, Spermophilus tridecemlineatus

   • P. L. Schwagmeyer

   OriginalPaper Pages: 195 - 200

6. The influence of reproductive status on foraging by hoary marmots (Marmota caligata)

   • David P. Barash

   OriginalPaper Pages: 201 - 205

7. Short-term residence in deflector lofts alters initial orientation of homing pigeons

   • Jerry A. Waldvogel
   • John B. Phillips
   • William T. Keeton

   OriginalPaper Pages: 207 - 211

8. Female defence polygyny in the bumblebee wolf, Philanthus bicinctus (Hymenoptera: Sphecidae)

   • Darryl T. Gwynne

   OriginalPaper Pages: 213 - 225

9. Reproductive value and appropriateness of response to predators by White-Crowned Sparrows

   • T. L. Patterson
   • L. Petrinovich
   • D. K. James

   OriginalPaper Pages: 227 - 231

10. Song repertoires and sexual selection in the Red-winged Blackbird

    • K. Yasukawa
    • J. L. Blank
    • C. B. Patterson

    OriginalPaper Pages: 233 - 238

11. Preovipository migration flights in the green lacewing, Chrysopa carnea (Planipennia, Chrysopidae)

    • Peter Duelli

    OriginalPaper Pages: 239 - 246

12. A new theory of sexual investment

    • J. Maynard Smith

    OriginalPaper Pages: 247 - 251

13. Erratum

    Erratum Pages: 252 - 252