1. The mating system of two hybridizing species of water striders (Gerridae)

   • R. Stimson Wilcox
   • John R. Spence

   OriginalPaper Pages: 79 - 85

2. The mating system of two hybridizing species of water striders (Gerridae)

   • John R. Spence
   • R. Stimson Wilcox

   OriginalPaper Pages: 87 - 95

3. Parental care sex differences in the brown bullhead, Ictalurus nebulosus (Pisces, Ictaluridae)

   • Lawrence S. Blumer

   OriginalPaper Pages: 97 - 104

4. Parental care of nestlings by male red-winged blackbirds

   • Alison M. Muldal
   • J. David Moffatt
   • Raleigh J. Robertson

   OriginalPaper Pages: 105 - 114

5. Nest site limitation and facultative polygyny in the ant Leptothorax longispinosus

   • Joan M. Herbers

   OriginalPaper Pages: 115 - 122

6. The kin recognition system of carpenter ants (Camponotus spp.)

   • Norman F. Carlin
   • Bert Hölldobler

   OriginalPaper Pages: 123 - 134

7. Clinal variation in anuran advertisement calls: basis for acoustic isolation?

   • Peter M. Narins
   • Sheila L. Smith

   OriginalPaper Pages: 135 - 141

8. Philopatry, reproductive success of females, and maternal investment in the red-necked wallaby

   • C. N. Johnson

   OriginalPaper Pages: 143 - 150