Three new species of Lachesilla in the rufa group (Psocodea: Psocomorpha: Lachesillidae) from the Sierra Tarahumara, Mexico

Three species of Lachesilla, in species group rufa, from the Sierra Tarahumara, Chihuahua, Mexico, are here described and illustrated: L. byei n. sp., L. furthi n. sp., and L. raramuri n. sp. Two of them belong in Subgroup IIb of the species group, one showing affinities with L. sommermanae Garcia Aldrete and L. yakima Mockford & Garcia Aldrete, the second one showing affinity with L. salamana Garcia Aldrete. The third species belongs in Subgroup I of the species group, showing affinities with L. aspera Garcia Aldrete and L. chiricahua Garcia Aldrete. The especies here described raise to seven the number of species of Lachesilla in the Sierra Tarahumara.