T.R. Van Devender, A.L. Reina-G., G. Ferguson, S. Hale, F. Reichenbacher, C. Smith
Mexico, Sonora, Fronteras, Sierra Buenos Aires, near intersection of Arroyo Santa Gertrudis with N-S road between Rancho El Capulin and El Aserradero; 53 km ESE (by air) of Cananea.