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Oecanthus nigricornis (Orthoptera: Gryllidae) as the first known host of Stylogaster neglecta (Diptera: Conopidae)

Published online by Cambridge University Press:  21 May 2020

Erik A. Etzler*
Affiliation:
Department of Ecology and Evolutionary Biology, University of Toronto at Mississauga, 3359 Mississauga Road N, Mississauga, Ontario, L5L 1C6, Canada
William D. Brown
Affiliation:
Department of Biology, State University of New York at Fredonia, Fredonia, New York, 14063, United States of America
Luc F. Bussière
Affiliation:
School of Biological and Environmental Sciences, University of Stirling, Stirling, FK9 4LA, United Kingdom
Darryl T. Gwynne
Affiliation:
Department of Biology, University of Toronto at Mississauga, 3359 Mississauga Road N, Mississauga, Ontario, L5L 1C6, Canada
*
*Corresponding author. Email: [email protected]

Abstract

The conopid fly Stylogaster neglecta Williston (Diptera: Conopidae) is a parasitoid with no known host. We report this species as the first recorded dipteran parasitoid of Oecanthus nigricornis Walker (Orthoptera: Gryllidae) (black-horned tree crickets). We reared field-collected O. nigricornis juveniles over several months in 2017 and found that larval S. neglecta emerged from them during late July into August. We estimated the incubation period for S. neglecta larvae to be around 30 days based on the length of time it took for them to emerge from the host and pupate (subsequently all hosts died). We documented several cases of multiple parasitism. In 2018, we dissected O. nigricornis sampled from four sites across southern Ontario, Canada and upstate New York, United States of America and found that the percentage of juvenile O. nigricornis parasitised ranged 2–39%. Further sampling will be necessary to determine whether this variation represents consistent population differences or between-year variation in parasitism.

Type
Research Papers
Copyright
© 2020 Entomological Society of Canada

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Footnotes

Subject editor: Maya Evenden

References

Burt, T.O., Skevington, J.H., and Rocha, L. 2015. Revision of Nearctic Stylogaster (Diptera: Conopidae). The Canadian Entomologist, 147: 125147. https://doi.org/10.4039/tce.2014.39.CrossRefGoogle Scholar
Cade, W. 1975. Acoustically orienting parasitoids: fly phonotaxis to cricket song. Science, 190: 13121313. https://doi.org/10.1126/science.190.4221.1312.CrossRefGoogle Scholar
Couri, M.S. and Barros, G.P.D.S. 2010. Diptera hosts of Stylogaster Macquart (Diptera, Conopidae) from Madagascar and South Africa. Revista Brasileira de Entomologia, 54: 361366. https://doi.org/10.1590/S0085-56262010000300003.CrossRefGoogle Scholar
Couri, M.S., Jordaens, K., Geeraert, L., Matheus, R., and Vieira-Araújo, A.P. 2019. Ethiopian muscids (Diptera, Muscidae) egg-carriers of Stylogaster Macquart (Diptera, Conopidae). Anais Da Academia Brasileira de Ciencias, 91: 18. https://doi.org/10.1590/0001-3765201920180901.CrossRefGoogle Scholar
Denner, M. 1968. Biology of the nematode Mermis subnigrescens Cobb. Doctoral dissertation. Iowa State University, Ames, Iowa, United States of America. Available from https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=4728&context=rtd [accessed 19 March 2020].Google Scholar
Freeman, B.A. 1966. Notes on conopid flies, including insect host, plant and phoretic relationships (Diptera: Conopidae). Journal of the Kansas Entomological Society, 39: 123131.Google Scholar
Fulton, B.B. 1915. Tree-crickets of New York: life-history and bionomics. Bulletin of the New York State Agricultural Experiment Station, 42: 146.Google Scholar
Gibson, J.F. and Skevington, J.H. 2013. Phylogeny and taxonomic revision of all genera of Conopidae (Diptera) based on morphological data. Zoological Journal of the Linnean Society, 167: 4381. https://doi.org/10.1111/j.1096-3642.2012.00873.x.CrossRefGoogle Scholar
Gibson, J.F., Skevington, J.H., and Kelso, S. 2013. A phylogenetic analysis of relationships among genera of Conopidae (Diptera) based on molecular and morphological data. Cladistics, 29: 193226. https://doi.org/10.1111/j.1096-0031.2012.00422.x.CrossRefGoogle Scholar
Godfray, H.C.J. 1994. Parasitoids: behavioral and evolutionary ecology. Princeton University Press, Princeton, New Jersey, United States of America.CrossRefGoogle Scholar
Godfray, H.C.J., Hassell, M.P., and Holt, R.D. 1994. The population dynamic consequences of phenological asynchrony between parasitoids and their hosts. Journal of Animal Ecology, 63: 110.CrossRefGoogle Scholar
Hassell, M.P. and May, R.M. 1973. Stability in insect host-parasite models. Journal of Animal Ecology, 42: 693726. https://doi.org/10.2307/3133.CrossRefGoogle Scholar
Kotrba, M. 1997. Shoot or stab? Morphological evidence on the unresolved oviposition technique in Stylogaster Macquart (Diptera: Conopidae), including discussion of behavioral observations. Proceedings of the Entomological Society of Washington, 99: 614622.Google Scholar
Lehmann, G.U.C. 2003. Review of biogeography, host range and evolution of acoustic hunting in Ormiini (Insecta, Diptera, Tachinidae), parasitoids of night-calling bushcrickets and crickets (Insecta, Orthoptera, Ensifera). Zoologischer Anzeiger, 242: 107120. https://doi.org/10.1078/0044-5231-00091.CrossRefGoogle Scholar
Lopes, H.D.S. 1937. Contribuição ao conhecimento do gênero “Stylogaster” Macquart, 1835 (Dipt.: Conopidae). Archivos Do Instituto de Biologia Vegetal, 3: 257293.Google Scholar
Macfarlane, R.P., Lipa, J.J., and Liu, H.J. 1995. Bumble bee pathogens and internal enemies. Bee World, 76: 130148. https://doi.org/10.1080/0005772X.1995.11099259.CrossRefGoogle Scholar
Marshall, S.A. 2012. Flies - the natural history and diversity of Diptera. Firefly Books, Richmond Hill, Ontario, Canada.Google Scholar
Otterstatter, M.C. 2004. Patterns of parasitism among conopid flies parasitizing bumblebees. Entomologia Experimentalis et Applicata, 111: 133139. https://doi.org/10.1111/j.0013-8703.2004.00162.x.CrossRefGoogle Scholar
Rasmussen, C. and Cameron, S.A. 2004. Conopid fly (Diptera: Conopidae) attacking large orchid bees (Hymenoptera: Apidae: Eulaema). Journal of the Kansas Entomological Society, 77: 6162. https://doi.org/10.2317/0306.16.1.CrossRefGoogle Scholar
Rees, N.E. 1973. Arthopod and nematode parasites, parasitoids and predators of Acrididae in America north of Mexico. Technical Bulletin of the Agriculture Research Services, United States Department of Agriculture, 1460: 1288.Google Scholar
Rettenmyer, C.W. 1961. Observations on the biology and taxonomy of flies found over swarm raids of army ants (Diptera: Tachinidae, Conopidae). University of Kansas Science Bulletin, 62: 9931066.Google Scholar
Schmid-Hempel, P. 2001. On the evolutionary ecology of host-parasite interactions: addressing the question with regard to bumblebees and their parasites. Naturwissenschaften, 88: 147158. https://doi.org/10.1007/s001140100222.CrossRefGoogle ScholarPubMed
Smith, L.M. 1930a. Macrorileya oecanthi Ashm. A hymenopterous egg parasite of tree crickets. Univiversity of California Publications in Entomology, 5: 165172.Google Scholar
Smith, L.M. 1930b. The snowy tree cricket and other insects injurious to raspberries. Bulletin of the California Agricultural Experiment Station, 505: 138.Google Scholar
Sonin, M.D. 1990. Helminths of insects. Oxonian Press, New Delhi, India.Google Scholar
Stuke, J.H. 2012. A revision of Afrotropical species of Stylogaster Macquart (Diptera: Conopidae), with descriptions of twenty-one new species and an identification key. African Invertebrates, 53: 267354. https://doi.org/10.5733/afin.053.0118.CrossRefGoogle Scholar
Udine, E.J. and Pinckney, J.S. 1940. Some egg parasites of Oecanthus quadripunctatus Beut. and of a species of Orchelimum. Proceedings of the Pennsylvania Academy of Science, 14: 8184.Google Scholar
Vickery, V.R. and Kevan, D.K.M. 1985. The grasshoppers, crickets, and related insects of Canada and adjacent regions. Canadian Government Services, Ottawa, Ontario, Canada.Google Scholar
Woodley, N.E. and Judd, D.D. 1998. Notes on the host, egg and puparium of Stylogaster Biannulata (Say) (Diptera: Conopidae). Proceedings of the Entomological Society of Washington, 100: 658664.Google Scholar