Diversity of Encyrtidae (Hymenoptera: Chalcidoidea) and other families of Hymenoptera obtained with Malaise traps in the tropical dry forest in the region of Huatulco, Oaxaca, Mexico

The results of the study of diversity of Encyrtidae and other families of Hymenoptera, obtained by Malaise traps in the tropical deciduous forest of Huatulco, Oaxaca, Mexico, between February 2005 and January 2006, are presented. Collections were carried out during 5 days of every month. The family Encyrtidae was represented by 2 subfamilies, 7 tribes, 9 genera and 17 species. The tribe with the largest number of genera and species was Anagyrini, with 3 genera and 3 species; the remaining tribes were represented by I genus and I species, respectively. Metaphycus Mercet, 1917 and Rhytidothorx Ashmead, 1900 were the genera with more species, Ooencyrtus Ashmead, 1900 was the most abundant genus. The richness value obtained with the nonparametric methods Jacknife 1 and Jacknife 2 was 31 and 45, respectively. Most species were represented by just 1 specimen. Encyrtidae showed no apparent seasonality. In addition, other 46 families of the order Hymenoptera were collected spread over 2 suborders and 11 superfamilies. The superfamily with the greatest number of families was Chalcidoidea, the most abundant was Vespoidea. More families were registered during the rainy season; abundance was very similar for both rainy and dry seasons.