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Urbanus alva ♀ genitalia a - Mexico: Chiapas: Mt. Huitepec (Genit. Prep. SRS-459); b - El Salvador: Sta. Tecla 900 m. (Genit. Prep. SRS-423). Image from: Steinhauser, Stephen Rogers 1981. A revision of the proteus group of the genus Urbanus Hübner. Lepidoptera: Hesperiidae. Bulletin of the Allyn Museum 62: 1-41, 61 figs. (4 September). p. 17-19, f. 50 |