Landry et al. 2006.pdf - Webspace

TAYGETE SPHECOPHILA IN THE GALÁPAGOS ISLANDS319FIGS 18-21Pupa of Taygete sphecophila. 18, Ventral view; 19, Dorsal view; 20, Segments 8-10; 21, Lateralview.ECOLOGICAL STUDYPATTERNS OF PREDATIONAlthough egg-laying was never observed, it is possible that the female mothslay their eggs within the pupal cells of P. versicolor through numerous small holes of1-2 mm in diameter that we observed on the back of the nests. In a sample of 25P. versicolor nests, the number of T. sphecophila moths found per nest varied between3 and 13. However, 42 T. sphecophila larvae were recovered by PS from a rather smallnest collected on Santa Cruz in 2004. The food source needed for the development ofthe moth’s larvae are the wasps’ pupae which are defenseless because of their isolationin their capped cells. When ready to emerge from the wasp's cell, the moth makes adistinctive breach through the cap covering the top of the cell.DISTRIBUTION OF INFESTED NESTSThe level of T. sphecophila infestation could only be assessed for nests ofP. versicolor that were abandoned. A total of 103 such nests were found on the differentstudy sites on Santa Cruz Island between 1999 and 2003, and 141 nests on FloreanaIsland in 1999. The percentages of nests that presented signs of predation by T. sphecophilaare given in Table 1, along with the vegetation zones in which they were found.