Adelomyrmex betoi Fernandez ^HNS NEW SPECIES (Fig. 72)

Worker measurements. Holotype. HL 0.59 HW 0.49 SL 0.32 EL 0.025 WL 0.55 GL 0.72 TL 2.35 CI 83 SI 67.

Worker diagnosis. Mandibles with 5 teeth. Anterior margin of clypeal plate concave. Eyes small, with 4 ommatidia. Hypostomal tooth inconspicuous. Mesosoma evenly curved, metanotal groove shallow. Propodeal teeth triangular, the point upward. Petiolar node thick. Postpetiole posteriorly with a strong transverse carinae. Head rugoreticulated, the rugulae long, longitudinal, the sculpturation mixed with dense punctuation. Promesonotum irregularly rugolose at center, rugoreticulated in the periphery. All carinae or rugulae beade-like. Petiole and postpetiole laterally with irregular rugulae. Mesosoma and gaster devoid of any pilosity. Head, mesosoma, petiole, postpetiole dark brown, appendages and gaster brown.

Queen and male: Unknown.

Holotype worker: MÉXICO: Veracruz, Cordoba, Paraje Nuevo, Nacimiento, tropical evergreen forest, Ver. 176 , 7.viii.1969, S. & J. Peck (Deposited in MZSP).

Paratypes: MÉXICO: 3 w, Veracruz, 4.4 mi N Huatusco, 4200’, 2.viii.1973, A. Newton (MZSP). 13 w, MÉXICO: Oaxaca, 15 mi S Valle Nacional town, 400 feet, 21.V.1971, S. Peck leg. No. 204 (Deposited in MZSP, IAvH, ICN, LACM, MIZA, USNM, BMNH, PSW).

Comments. A. betoi ^HNS is easily separated from the other members of the genus by the bead-like carinae or rugulae. That is, the carinae are not continuous, but look “plaited”. The mesosoma and gaster are devoid of any pilosity, a trait unique in the genus. Moreover, the posterior face of the petiole has a strong transverse keel.