Communities: 215-229, edited by Robert E. RickJefs and 

 Dolph Schluter. Chicago: University of Chicago Press (1993). 



Ricklefs, Robert E. and Latham, Roger Earl. "Intercontinental 

 Correlation of Geographical Ranges Suggests Stasis in 

 Ecological Traits of Relict Genera of Temperate Perennial 

 Herbs." The American Naturalist 139(6): 1305-1321 (1992). 



Ricklefs, Robert E. and Miles, Donald B. "Ecological and 

 Evolutionary Perspectives from Morphology: An Ecological 

 Perspective." In: Ecological Morphology: Integrative Orgamsmal 

 Biology: 13— 41, edited by P.C. Wainwright and S.M. Reilly. 

 Chicago: University of Chicago Press (1994). 



Ricklefs, Robert E. and Schluter, Dolph (editors). Species 

 Diversity in Ecological Communities. Chicago: The University 

 of Chicago Press (1993). 



Roberts, Tyson R. "Artisanal Fisheries and Fish Ecology 

 Below the Great Waterfalls of the Merong River in 

 Southern Laos." Natural History Bulletin of the Stam Society 

 41: 31-62 (1993). 



Rodriguez, Viterbo. "Function of the Spermathecal Muscle in 

 Chelymorpha alternans Boheman (Coleoptera: Chrysomehdae: 

 Cassidinae)." Physiological Entomology 19: 198—202 (1994). 



. "Mating Behavior in Charidotella sp. Nr. 



Sexpunctata (Coleoptera: Chrysomehdae: Cassidinae)." The 

 Coleopterists Bulletin 47(1): 37-38 (1993). 



. "Sexual Behavior in Omaspides convexicollis Spaeth 



and 0. bistnata Boheman (Coleoptera: Chrysomelidae. 

 Cassidinae), with Notes on Maternal Care of Eggs and Young." 

 The Coleopterists Bulletin 48(2): 140-144 (1994). 



Roisin, Yves. "Selective Pressures on Pleometrosis and 



Secondary Polygyny: A Comparison of Termites and Ants." 

 In: Queen Number and Sociality in Insects: 402-421, edited by 

 L. Keller. Oxford: Oxford Universiry Press (1993). 



Roubik, David W. "Ants, Wasps and Bees." In: Belalong: A Tropical 

 Rainforest: 248—252, edited by Earl of Cranbrook and David S. 

 Edwards. London: The Royal Geographical Society (1994). 



. "Behavior and Evolution ofTngona" [Abstract] 



In: Les Insectes Sociaux 12lh Congress of the International Union 

 for the Study of Social Insects 1USS1: 18, edited by Alain 

 Lenoir, Gerard Arnold and Michel Lepage. Paris: 

 Publications Universite Paris Nord (1994) 



. "Direct Costs of Forest Reproduction. 



Bee-Cycling, and the Efficiency of Pollination Modes "' 

 Journal of BtoSciences 18(4): 537-552(1993). 

 "Robber Bees as Army Ants." [Abstract] In 



Les Insectes Sociaux 121 h Congress of the International Union for 

 the Study of Social Insects IUSSI: 201, edited by Alain Lenoir, 

 Gerard Arnold and Michel Lepage. Paris: Publications 

 Universite Paris Nord (1994). 

 . "Tropical Pollinators in the Canopy and 



Understory: Field Data and Theory for Stratum 

 Preferences." Journal of Insect Behanor 6(6): 659— 6"3 (199?) 

 Roubik, David W., Gadagkar, G., Inoue, T. and Ashton. PS 

 (eds.) Durrsity and Flexibility of Btottc Communities 1* 

 Fluctuating Environments Special Issue of Journal of 

 BioScience. 18(4X1993). 



Ryan, Michael J. "Costs of Reproduction." In: Physiology of the 

 Amphibians: 426-434, edited by M. Feder. Chicago: 

 University of Chicago Press (1992). 



Sagers, Cynthia. "Manipulation of Host Plat Quality: Herbivores 

 Keep Leaves in the Dark." F una tonal Ecology 6: 741-743 (1993). 



. "Reproduction in Neotropical Shrubs: The 



Occurrence and Some Mechanisms of Asexual lty." Ecology 

 74(2): 615-618 (1993). 



Sakagami, S.F., Roubik, D av 'd W. and Zucchi, R. "Ethology 

 of the Robber Stingless Bee, Lestrimelitta limao 

 (Hymenoptera: Apidae). Sociobiology 21(2): 237-277 (1993). 



SaJazar Allen, Noris. "Editorial". Brwlatina 32: I (1994). 



. "Leucophanaceae". In: Moss Flora of Central 



America: Part I. Sphagnaceae-Calymperaceae: 190, edited by 

 Bruce Allen. Missouri Botanical Garden (1994). 



. "Octoblepharum" . In: Moss Flora of Central 



America: Part 1. Sphagnaceae-Calymperaceae: 3, edited by 

 Bruce Allen. Missouri Botanical Garden (1994). 

 . "Taxonomic Results of the BRYOTROP 



Expedition to Zaire and Rwanda 16. Leucophanaceae." 



Tropical Bryology 8: 149-152 (1993). 

 Salazar A., Noris, Correa A., Mireya D. and Peralta, Claudia G. 



de. Gui'a Floristica del Sendero de Interpretation Panama: Parque 



Nacional Altos de Campana (1994). 

 Sandoval Martinez, Nidia Raquel. Aislamiento y 



Determinacion del potencial Biodegradativo de Bactenas y 



Hongos Utilizadores de Hidrocarburos del Petroleo. Thesis, 



Panama: University of Panama (1993). 

 Schmidt, Winfned and Jung, Peter. "Tertiary Cephalopods 



from Jamaica." In: Biostratigraphy of Jamaica: 347-352, 



edited by R.M. Wright and E. Robinson. Bolder, Colorado: 



Geological Society of America (1993). 

 Schneider, J. A. "On the Anatomy of the Alimentary Tracts of 



the Bivalves NemocardiumA Keenaea ) centifilosum (Carpenter, 



1864) and Clmocardium nultalln (Conrad, 1837) (Cardndae)." 



The Veliger 37(1): 36-42 (1994). 

 Schulz, William "Barro Colorado Island Field Station 



Celebrates 70th Anniversary." Smithsonian Institution 



Research Reports Spring (72): 1, 6 (1993). 

 . "Evolution Research Yields Insight About 



Disease-Causing Pathogens." Smithsonian Institution Research 



Reports Summer (77): 4 (1994). 

 Sevenster, Jan G and Van Alphen.J.M. "A Life History 



Trade-Off in Drosophila species and Community Structure 



in Variable Environments." Journal of Animal Ecology 62: 



720-736 (1993) 

 . "Coexistence in Stochastic Environments 



Through a Life History Trade Off in Drosophila " Lecture 



Notes in Biomathematics 98: 155-172 (1993). 

 Sieving. Kathryn. "Nest Predation and Differential Insular 



Extinction Among Selected Forest Birds of Central 



Panama." Ecology 73(6): 2310-2328 (1993). 

 Soli's, Frank A., Ibafiez, Roberto and Jaramillo, Cesar. 



"Distribution de las Scrpientes Colubridae segun la 



Fisiologia de Panama." In: XII Congreso Cientifico 



218 



