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.

Palabras clave: albura, duramen, industria de madera, Scolytinae, Bostrichidae, Lyctidae, manejo de maderas.Keywords: sapwood, heartwood, wood industries, Scolytinae, Bostrichidae, Lyctidae, wood management. RESUMENLos organismos xilófagos y xilomicetófagos pueden causar un gran deterioro a las maderas. En este estudio se determinó la presencia y se identificaron los insectos que atacan las 13 maderas más comercializadas en el Valle de Aburrá, se determinaron cuáles son los que generan los mayores daños y se identificó el tejido de la madera más atacado. Así mismo, se realizaron observaciones sobre el manejo y las condiciones de almacenamiento de las maderas en 27 industrias madereras en las que se inspeccionaron 426 muestras. Los más insectos comunes y de mayor importancia fueron Scolytinae y Bostrichidae. En el 41% de las muestras analizadas fue posible identificar el tejido de la madera atacado y aun cuando todas las especies estudiadas presentaron ataques, no se extrajeron muestras de insectos de todas ellas. En general se observaron deficiencias en la manipulación y el almacenamiento de las maderas en las industrias visitadas, lo cual puede aumentar el impacto de los agentes de deterioro. ABSTRACTXylophagous and xylomicetophagous insects can cause serious deterioration of timber. The insects attacking the thirteen most traded timbers in the Valle de Aburrá were identified and their presence was confirmed. Insects causing most of the damage were determined and the wood tissue most attacked was characterized. Comments on the handling and storage conditions of the wood were recorded in 27 wood industries visited and 426 wood samples were inspected. The most important and most common insects found belong to the Scolytinae and Bostrichidae subfamilies. In addition, the most attacked wood tissue was identified in 41% of the samples. Even though all species studied showed traces of damage caused by insects, insect samples were not recovered from each wood sample. In general, there were deficiencies in wood handling and storage at the visited industries, which may increase the impact of decay agents.

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.

Lucilia eximia (Wiedemann, 1819) (Diptera: Calliphoridae) is a blowfly with medical and forensic importance that shows genetic and color variation, however, these variations have not justified the description of new species. But in forensic entomology an accurate identification of species and subpopulations is crucial. We explored the genetic variation of L. eximia from eight localities, in five natural regions in Colombia using two mitochondrial fragments, including the standard locus for insect identification COI and the Cytb-tRNA-Ser-ND1 region. We found significant differentiation at COI and Cytb-tRNA-Ser-ND1 level, characterizing two lineages and revealing a deep and significant genetic split. High values of FST and genetic distances supported the two lineages. The origin of the divergence of L. eximia remains to discover. Examining whether the lineages have diverse ecological and biological behaviors could be a significant impact on the use of L. eximia in forensic and medical science. Our results could have relevant implications for the use of post-mortem interval estimation based on insect evidence, as well as our sequences improve the database used in DNA-based methods for identifying forensically important flies.

The eucalyptus snout beetle, Gonipterus spp. are a pest of Eucalyptus stands in the world causing serious economic loses. Gonipterus platensis (Figure 1) was ¬rst reported in Antioquia (Colombia) in 2016, by the Instituto Colombiano Agropecuario –ICA (ICA, 2016), threatening more than 60.000 ha planted with eucalyptus around the country. Classical biological control of these species has worked in some countries using the egg parasitoids Anaphes nitens (Girault) and Anaphes inexpectatus Huber & Prinsloo, 1990 (Hymenoptera: Mymaridae) and complemented with di erent natural enemies (NE) in some countries (Nascimento et al. 2017). A. nitens had been reported with high e cency ¬nding G. scutellatus egg masses reaching a parasitism rate of 80–100% of eggs in North west Spain (Rivera et al. 1999). It is necessary to know Gonipterus platensis NE, including the presence of A. nitens and A. inexpectatus, in local conditions so integrated pest management programs could be designed. This is the ¬rst survey of the NE for G. platensis in Colombia.

Cedrela odorata is one of the most important commercial Neotropical forestry species, harvested mainly from natural forest, what have taken the species to danger of extinction. Its commercial plantation is limited by Hypsipyla grandella attacks, which could reach 100% of individuals in a forest plantation (Figure 1). Inverse relation of available calcium concentration in the soil for C. odorata and attacks of H. grandella had been reported (da Silva et al., 2009). Some studies indicate that calcium and boron addition to the soil has a positive e ect in height growth of Swietenia macrophylla (da Silva Junior et al., 2014); nevertheless, some studies suggest that when growth is high there is an increase in attack probability (Newton et al., 1993). Then some clarity on this subject is required.

The eucalyptus snout beetle, Gonipterus spp. are a pest of eucalyptus worldwide (Figure 1). Gonipterus platensis was rst reported in Colombia in 2016, threatening and causing economic losses in more than 60.000 ha of Eucalyptus spp. planted in the country. Classical biological control of these species has been e ective in some countries with Anaphes nitens (Girault) and A. inexpectatus Huber & Prinsloo, 1990 (Hymenoptera: Mymaridae), and complemented with di erent natural enemies (NE) (Nascimento et al. 2017).

No abstract