The Yellow-throated Gartersnake (Thamnophis pulchrilatus) (Cope, 1885) is an endemic Mexican snake (Dixon and Lemos-Espinal, 2010; IUCN, 2019) that can reach 772 mm as total length (Rossman et al., 1996). Their populations are disjunct throughout its distribution: the northeastern-most ones are located in western and southeastern Durango along the Sierra Madre Occidental, Sierra Madre Oriental and the Trans-Mexican Volcanic Belt (Flores-Villela, 2007). Additionally, there are records of the species in isolated localities in Zacatecas, Aguascalientes, Guanajuato (Flores-Villela, 2007), San Luis Potosí (Ramírez-Bautista et al., 2009), Tlaxcala (Fernández et al., 2006) and Hidalgo (Fernández- Badillo et al., 2016). It is associated to fir, pine (Dixon and Lemos-Espinal, 2010), oak and pine-oak forest (Dixon and Lemos-Espinal, 2010; González-Hernández et al., 2016), tropical scrub forest ecotone and grassland (Carbajal-Marquez et al., 2014). This snake can tolerate some disturbance, given that Fernández-Badillo et al. (2016) registered an individual under a rock at the edge of a crop field next to an oak forest, and Ponce-Campos (October 23, 2005) observed and individual under a rock in an altered pine-oak forest at northern edge of Sierra de Tapalpa, where vegetation was removed, and soil was extracted with heavy machinery. Thamnophis pulchrilatus is terrestrial with diurnal or twilight habits (González-Hernández et al., 2016, Fernández-Badillo et al., 2016). Although, González-Hernández et al. (2016) registered two individuals inactive on oak tree branches at 2.10 m and 4.96 m, respectively. It has been suggested that it may prey on fish, anuran tadpoles and adults and other invertebrates like crabs, leeches, and earthworms (Dixon and Lemos-Espinal, 2010). Bell’s False Brook Salamander (Isthmura bellii) (Gray, 1850) is a Mexican endemic salamander (Parra-Olea et al., 2010). It is classified as Threatened in the Mexican law (SEMARNAT, 2010) and Vulnerable (VU) in the IUCN Red List (IUCN, 2019). It is the largest lungless salamander with a maximum size of 360 mm in total length (Parra-Olea et al., 2005). Its main distribution is along the highlands in western and southern margins of the Mexican plateau through Trans-Mexican Volcanic Belt, with numerous isolated populations from the border area of Sonora and Chihuahua, and from central Tamaulipas, to the mountains of central Guerrero (Parra-Olea et al., 2005). According to Bryson et al. (2018) Isthmura bellii show evidence to be paraphyletic and may comprise several cryptic species along its distribution, where the denominated I. sierraoccidentalis is part of the western clade which include Jalisco populations. It is associated to pine and pine-oak forest at high elevation, as well as forest edges and grazed areas (Parra-Olea et al., 2010; Bryson et al., 2018). It is diurnal (Ramírez-Bautista et al., 2014) and can be seen active near the water or hiding in humid microhabitat as under rocks and trunks or inside dead logs (Santiago-Pérez et al., 2012; Quintero-Díaz et al., 2014; Bryson et al., 2018). As part of the project titled “Checklist of the herpetofauna in the Sierra de Tapalpa, Jalisco, Mexico”, we conducted diurnal and nocturnal monthly surveys Herpetology Notes, volume 12: 721-723 (2019) (published online on 07 July 2019) First record of the predation on Bell’s False Brook Salamander Isthmura belli (Gray, 1850) by the Yellow-throated Gartersnake Thamnophis pulchrilatus (Cope, 1885) in Western Mexico Armando de Jesús Fraustros-Sandoval 1 , Aldo Dávalos-Martínez 1 , Verónica Carolina Rosas-Espinoza 1 , Ana Luisa Santiago-Pérez 1,* , Paulino Ponce-Campos 2 , and Eliezer Iñiguez Ochoa 3 1 Universidad de Guadalajara, Centro Universitario de Ciencias Biológicas y Agropecuarias, C.P. 45200 Zapopan, Jalisco, México. 2 Bosque Tropical, Investigación para la Conservación de la Naturaleza, A. C. Misión San Antonio, Torre 4a, depto. 2, C.P. 45030 Zapopan, Jalisco, México. 3 UMA San Javier. Prolongación Morelos # 107, Tapalpa, Jalisco, México. * Corresponding author. E-mail: ana.santiago@academicos.udg.mx