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Four new species of Grotea Cresson are described: Grotea goianiense Herrera-Flórez sp. n., G. paulista Herrera-Flórez sp. n. and G. amazonensis Herrera-Flórez sp. n. from Brazil and G. surinamese Herrera-Flórez sp. n. from Suriname. An identification key to Brazilian and Suriname species of this genus is given. New descriptions for G. delicator (Thunberg 1822) and G. perplexa Slobodchikoff 1970 are provided.

The genus Grotea has 18 described species. A new species, Grotea villosissima sp. n., is described here and its host information included. This is the first record of Grotea for Colombia.

A new species of Umanella Gauld 1991, U. tricoloripes Herrera-Florez, sp. n., is described from two males collected in Colombia. Umanella tricoloripes sp. nov. differs substantially from the other species of the genus in color pattern.

The Darwin wasp Xorides ater is a solitary idiobiont ectoparasitoid of wood-boring beetle larvae. It occurs across the Palaearctic, and in Switzerland seems to be restricted to areas above 980 m altitude. Very little is known about its biology and behaviour. We here report three separate instances of a female X. ater mating simultaneously with two males, observed on the same occasion on a Picea abies woodpile near Lenk, Switzerland. Only two copulae that involved one male and one female were observed at the same time, which might indicate that this mating mode is rather common in X. ater. We illustrate our observations with photo and video material and compare it to mating behaviour known from other species of Darwin wasps.

2018) First report of Zethus schadei (Hymenoptera: Vespidae) as natural enemy of Hypsipyla grandella Zeller (Lepidoptera: Pyralidae) from Colombia. Acta Zoológica Mexicana (nueva serie), 34, 1−3. ABSTRACT. Zethus schadei Bohart & Stange is reported for the first time for Colombia and as a natural enemy of Hypsipyla grandella. The specimens were obtained from terminal shoots of Cedrela odorata L. (Meliaceae) in a plantation in the municipality of San Roque, Antioquia, Colombia.

The genus Mesostenus Gravenhorst has sixty one described species worldwide. A new species, Mesostenus hypsipylaphagous Herrera-Florez, sp. n. is described and its host given. This is the first record of Mesostenus from Colombia.

The genus Sphelodon Townes has 13 described species, nine species from the Neotropical region, three species from the Nearctic region and one (Sphelodon phoxopteridis) that occurs in both regions. A new species, Sphelodon antioquensis sp. n. is described here. This is the first record of Sphelodon for Colombia. A key to Sphelodon species occurring in the Neotropical Region is provided.