The full-grown larval stage of Curculio mexicanus Gibson is described and illustrated for the first time. The larvae were collected in fruits (acorns) of several species of Quercus L. (Fagaceae): Q. pinnativenulosa C. H. Mull, Q. xalapensis Bonpl., Q. germana Schltdl. & Cham., Q. candicans Née and Q. polymorpha Schltdl. & Cham; all species with wide distribution in the Sierra Madre Oriental and representative of the mountain mesophilic forest of Xalapa, Veracruz, Mexico. The record of Curculio mexicanus in Veracruz constitutes the first report for this species, as previously it was only known in Chiapas, Durango, Guerrero, Nayarit, Oaxaca and Sonora, in Quercus magnoliifolia Née (Q. macrophylla Née). Of those five mentioned host species of Quercus: Q. xalapensis and Q. germana are listed as vulnerable; thus, it is important to carry out research concerning this interaction in order to develop conservation strategies for these oaks as well as correct management and control of the weevils.

We report two new records of gynandromorph bees: Heriades carinata Cresson, 1864 the first reported record of a gynandromorph in the genus and the first of the species Dianthidium pudicum pudicum (Cresson, 1879) (Megachilidae) and include descriptions, images, and 3D scans of both specimens. We also provide images and a 3D scan of the first Dianthidium gynandromorph originally reported by Hicks (1926), D. curvatum sayi Cockerell, 1907. We CT scanned each specimen, though these scans did not reveal any internal morphological structures.