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Celery, Apium graveolens L. (Apiaceae), is an essential salad ingredient in different parts of the world, and production is principally destined for the fresh market. Celery hosts several insect species, including the weevil Listroderes costirostris Schoenher (Coleoptera: Curculionidae). Listroderes costirostris currently is present in the San Quintin Valle, Baja California, Mexico, on commercial celery crops. Hypera postica (Gyllenhal) (Coleoptera: Curculionidae) feeds on several plants of the Fabaceae family and is the principal pest affecting Medicago sativa L. (Fabaceae) alfalfa crops. The purpose of this work was to assess the degree of infestation, spatial distribution, and the association between L. costirostris and H. postica on A. graveolens, in Baja California, Mexico. We established 4 quadrants in 1 ha, and we sampled 100 plants per quadrant in each sample. We collected 22 samplings, counting the larvae and adults of both species. Hypera postica was reported herein for the first time feeding on A. graveolens plants. Between 9.57% and 28.68% of the celery plants served as hosts to both species. Listroderes costirostris had the highest percentage of infested plants. The competitive interaction of these 2 species affected H. postica, which showed lesser abundance. Both species were associated in all the sample quadrants. Listroderes costirostris registered an aggregated distribution pattern, whereas H. postica presented a uniform distribution. The spatial distribution of H. postica is the result of competing for food and space with L. costirostris.

La región norte de Coahuila es una de las zonas productoras de nuez más importantes en México. Euplatypus segnis (Chapuis, 1865) y Xyleborus ferrugineus (F. 1801) curculiónidos plaga asociados a nogales en el país, desconociéndose si hay otros presentes en las huertas. De julio de 2015 a septiembre de 2016 y agosto de 2017 se realizaron muestreos en el Banco de Germoplasma del INIFAP-Sitio Experimental Zaragoza, ocho huertas comerciales y árboles nativos de nogal. Utilizando como métodos de muestreo red entomológica estándar y manteo- aspersión del follaje con Cipermetrina. Se recolectaron 1 174 especímenes adultos de insectos, determinando seis órdenes, 49% fueron coleópteros, siendo Coccinellidae la familia más abundante, 17% fueron curculiónidos (203 adultos y 32 especies identificadas). Pandeleteius cinereus (Horn, 1876), Compsus auricephalus (Say, 1824) y Conotrachelus leucophaetus Fahraeus, 1837 se recolectaron en follaje de nogales, actualmente estas especies no son de importancia económica para el cultivo. Smicronyx interruptus (Blatchley, 1916), S. sculpticollis (Casey, 1892) y Thecesternus hirsutus (Pierce, 1909) son posibles agentes de control biológico natural para Cuscuta L., 1753, Acacia (Mill, 1754) y Parthenium L., 1753. Es importante que no se recolecto ningún ejemplar de Curculio caryae (Horn, 1873), Euplatypus segnis ni Xyleborus ferrugineus, curculiónidos consideradas plagas del nogal pecanero en México.

Presently the only keys available for identification of genera of Anthonomini are limited to those of the United States of America and Canada. A dichotomous key is presented to identify all genera of Mexican and Central American Anthonomini. Previous keys do not include the genera Achia, Botanebius, Loncophorus, Loncophorellus and Melexerus. A brief synopsis is given for each genus and photographs of representative species are included.

Four new species of the previously monotypic genus Narberdia Burke are described. All of them are intimately associated with plants of the genus Bernardia (Euphorbiaceae). Narberdia cervantae Soto-Hernández, new species (México, Jalisco on Bernardia spongiosa McVaugh), N. sarukhani Soto-Hernández, new species (México, Veracruz and Costa Rica on B. mexicana (Hook. & Arn.) Müll. Arg. and B. nicaraguensis Standl. & L.O. Williams), N. dugesi Soto-Hernández (México, Querétaro and Michoacán on B. mexicana and B. albida Lundell), and N. ramuvei Soto-Hernández, new species (México, Durango, Jalisco and Puebla on B. changii A. Cerv. & Flores Olv., B. rzedowskii A. Cerv. & Flores Olv. and B. valdesii A. Cerv. & Flores Olv.). Use of more than one species of plant as a host by one species of weevil is a common occurrence in Anthonomini. Sexual dimorphism is evident in the species with the female rostrum more slender and relatively longer than in male, the antennal scape attached near the midpoint of the rostrum in the female and beyond the midpoint in the male, and female with pro- and mesotibia bearing a tooth adjacent to the mucro, this tooth absent in the male. Specimens were collected at elevations from 62 m to 2288 m. The genus, previously only known from the United States of America and extreme northern México is now also known from Costa Rica as well as other areas of México. Narberdia apparently is most closely related to several Anthonomus squamosus species group members, both with similar characters of the body and form of the male median lobe (broad at the apex and strongly narrowed near the apex).