clypeus

Clypeus finely longitudinally striated forming a triangular shape with distinct clypeal carina.

pulcher, but is distinguished by a bicoloured body, the shallowly concave anterior clypeal margin, the absence of well-developed anterior clypeal teeth, the fewer irregular longitudinal cephalic rugae and the feeble longitudinal rugae on the posterior face of the petiolar node.

This species is distinguished by the overall yellow-brown integument, the clypeal remnant with a vertical carina, the prosternum with a Y-shaped carina, and morphology of the aedeagus.

are identified by 12-segmented antennae, fewer than 10 mandibular denticles or teeth, antennal sockets almost abutting the posterior clypeal margin, long and conspicuous maxillary palps, coarse and erect hairs on the head and mesosoma, short and compact mesosoma without constriction of the mesonotum, and absence of erect setae on the propodeum.

durangoana) and clypeal apex narrowly parabolic (apex broadly parabolic in R.

Head: holoptic, frontal vitta obliterated, chestnut color, widened when reaching the lunule, in the more slender portion with approximately 1/2 diameter of the anterior ocelli; parafrontal and parafacialia yellow with silver tomentum and bare; gena yellow with silver tomentum, postgena and occiput white tomentum, with thin and long hairs; face and clypeal membrane pale; ocellar triangle chestnut; scape, pedicel, flagellomere and palp orange in color.

Head length (HL), in full face view, the maximum length of the head excluding the mandibles, from the midpoint of the anterior clypeal margin to the midpoint of the posterior margin of the head.

Pekkarinen (1995) compared measurement data for seven parameters (oculo-malar length, distance between compound eyes on vertex, postocellar width, distance between posterior ocellus and occipital margin, clypeal width, clypeal length and pronotal width), along with features of the male genitalia (upper inner margin of the paramere and tip of the aedeagus) and likewise concluded that D.

Punctuation on head fine punctures separated by about 1.0 times a diameter; frons broad, wide about one-half as wide as head, moderately emarginated around antennal insertions; clypeal margin slightly emarginated; eyes moderately large and rather coarsely faceted distinctly notched near antennal insertion; antennae 11-segmented (Fig.

Anterior lateral eyes on clypeal edge, separated by less than their diameter, AME close to each other; ocular group wider behind than in front.