1984] 
Hoddobler & Engel-Siegel — Metapleural gland 223 
on large pieces of dead wood. It is entirely possible that con- 
temporary terrestrial species might have originiated from arboreal 
ancestors that had already lost their metapleural gland. We have 
currently no explanation, however, why Camponotus gigas appears 
to have retained or redeveloped its metapleural gland. Of course, it 
would also be interesting to known how those terrestrial species that 
have lost their metapleural gland defend themselves and their nests 
against microbial and fungal attacks. 
Acknowledgements 
We thank all the collectors mentioned in Table 1 and 2, and B. 
Bolton, W. L. Brown, R. Snelling, R. W. Taylor for helping us with 
the identification of many species, and Ed Seling for his assistance 
during the SEM work. Special thanks to R. W. Taylor and the 
Division of Entomology, CSIRO, Canberra (Australia) who in 
many ways supported this study. The work was further supported 
by grants from the National Science Foundation, the National 
Geographic Society and the John Simon Guggenheim Foundation. 
Appendix 
We would like to take this opportunity to correct some errors 
which appeared in two of our previous publications on exocrine 
glands in ants. 
1) In our paper “Tergal and sternal glands in ants” (Psyche 85, 
285-330, 1978) on page 297, (Table la), Myrmecinae should be 
corrected to Myrmicinae; on page 298, the locality of Veromessor 
pergandei, given as Mexico, should be corrected to Arizona; on 
page 299, the species PaChycondyla spec, listed under the subfamily 
Formicinae should be corrected to Acantholepis spec. 
2) In our paper “Tergal and sternal glands in male ants” (Psyche 
89 , 1 13-132, 1982), Fig 1 B, the lettering PG should be changed to P, 
because it indicates part of the penis with the penis gland, and not 
the pygidial gland (PG), shown in Fig. 1A. 
References 
Ayre, G. L. and M. S. Bu m. 1971 Attraction and alarm of ants ( Camponotus 
spp.— Hymenoptera: Formicidae) by pheromones. Physiological Zoology 44: 
77-83. 
