Discussion. Necydalis christinae n. sp. is close with Necydalis ulmi Chevrolat, 1838 but it is easy to distinguish immediately for the whole light antennae, blackish from the 4th joint in N. ulmi. The new species shows erect black hairs on elytra, missing in ulmi. Antennae and legs are shorter, in Necydalis ulmi antennae are reaching the middle of the body, in the new species they are evidently shorter than the middle. Elytra and all the appendix are lighter than in Necydalis ulmi. Aedeagus and endophallus are similar than in Necydalis ulmi. Paramers are truncate to the apex, little acuminate in ulmi (Figs. 5-6).
Description from: [Rapuzzi, P. & Sama, G. 2014. Descriptions of nine new species of longhorn beetles (Coleoptera: Cerambycidae). Munis Entomology & Zoology, 9 (1): 1-16]