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New Hosts, Host Plants, and Distribution Records for Horismenus (Hymenoptera: Eulophidae) Species in a Bruchid Beetle Parasitoid Guild Attacking Wild Type Phaseolus coccineus and P. vulgaris in Central Mexico

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Florida Entomologist
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Abstract

698 Florida Entomologist 91(4) December 2008 NEW HOSTS, HOST PLANTS, AND DISTRIBUTION RECORDS FOR HORISMENUS (HYMENOPTERA: EULOPHIDAE) SPECIES IN A BRUCHID BEETLE PARASITOID GUILD ATTACKING WILD TYPE PHASEOLUS COCCINEUS AND P. VULGARIS IN CENTRAL MEXICO A RTURO B ONET Instituto de Ecología A. C. km 2.5 antigua carretera a Coatepec No. 351, Apdo. postal 63, 91000 Xalapa, Veracruz, México e-mail: [email protected] The 62 described species of parasitoids and hy- perparasitoids of the genus Horismenus Walker (Hymenoptera: Eulophidae) attack Lepidoptera, Coleoptera, and Hymenoptera larvae; which are either primary or secondary hosts. The host plants in which they can be found correspond to some 10 angiosperm families distributed along 14 countries of the Neotropical region (Noyes 2003). While examining material from the entomol- ogy collection of the Instituto de Ecología A. C. in Xalapa, Veracruz, Mexico (IEXA), we found that specimens of Horismenus species had labels with information on hosts, host plants, and distribu- tion records which are definitely new for the ge- nus. Those insects are the result of 25 years of col- lecting wild type and cultivated bean pods of Phaseolus coccineus L. and P. vulgaris L. (Legu- minosae: Papilionoideae), throughout the state of Mexico (Estado de México), Morelos, and Puebla to study the infesting rates of Acanthoscelides ob- tectus (Say) and A. obvelatus Bridwell (Chry- somelidae: Bruchinae), and its naturally associ- ated parasitoids. The specimens described herein were obtained from isolated seeds in which a bruchid host and Horismenus parasitoids emerged in the same seed. Although, Hansson et al. (2004) identified 4 species of Horismenus in the bruchid beetle para- sitoid guild on wild type beans, they did not record specific hosts an

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