A revision of the genus Xenochilicola (Hymenoptera: Apoidea, Colletidae), with the description of a new species Author Genaro, Julio A. Author Packer, Laurence text Zootaxa 2005 1054 1 14 journal article 10.5281/zenodo.170069 115690f0-8bb8-4fdc-bee4-a5b52421eb18 1175­5326 170069 Xenochilicola haroldotoroi Genaro and Packer , n. sp. (Figs. 3, 6, 18–21) Diagnosis. Male. The dark metasoma with brown marginal zones differentiates the new species from X. diminuta . The length:width ratio of the face, in frontal view is (1.12:1.01), intermediate between X. mamigna (0.92:0.90) and X. diminuta (1.01:0.84). Mesoscutellum densely punctured (i<d). S5 with lateral brushes of hair ( Fig. 18 ), as in X. mamigna ( X. diminuta has a distinct lateral hairy process, Fig. 14). S7 with large disc (in X. diminuta it is small) and without lobes; the form of the apodemal arms differ from the other species ( Figs. 10 , 15 and 19). S8 with the median apical process shorter than in other species (compare Figs. 11 , 16 and 20). Males are larger than those of the other two species. Description. Male. Body length 3.10–3.50 mm , forewing length 2.10–2.30 mm (Fig. 6). Colouration . Black with yellow on mandible (except apex dark brown), labrum, clypeus, and spot on malar space, scape and pedicel ventrally, spot on pronotal lobe and tegula; apices of femora (on forefemur reaching midlength ventrally), whole foretibia, mid and hind tibia dorsally, all tarsi; following parts brown: antennal flagellum, wing veins, marginal zone on metasomal T1–T5 (in some specimens whole T5), T6, median areas on apical margins of sterna. Surface sculpture . Microsculpture imbricate except: labrum, supraclypeal area, frons and vertex with surface shiny. Labrum with dense, coarse punctures, clypeus with sparse shallow large punctures, gena with punctures longitudinally effaced (i>>d). Frons, paraocular area and vertex punctate­reticulate; supraclypeal area irregularly punctate, mesoscutum irregularly punctate (i~d on disk, i<d medially), mesoscutellum (i<d) and mesepisternum (i<d), metanotum coarsely punctate; preepisternum reticulate­punctate, hypoepimeral area with longitudinal striae, becoming reticulate above, irregularly punctate (i<d; i=1–2d on disk); propodeum with dorsal and lateral surfaces reticulate, lateral surface irregularly punctate on dorsal half (i=1–2d); T1 irregularly punctate (i=0.5– 3d on disk; i<d at sides; acarinarium impunctate); T2 weakly punctate, T5–T6 with few sparse punctures. FIGURES 18–21. Xenochilicola haroldotoroi n. sp. male: 18. ventral surface of S5; 19 . S7; 20. S8; 21. genitalia. Dorsal views to left, ventral to right. Pubescence . White, short and appressed on lower paraocular area, posterior margin of pronotum and anterior margin of mesoscutum; long sparse hairs (>1MOD) on clypeus, frons and vertex; shorter and denser on gena, pronotum, mesoscutum and mesoscutellum (>MOD); denser, shorter hairs on mesepisternum and propodeum (~MOD); legs with short hairs, sparse on femur and tibia (<MOD); metasomal terga with short sparse hairs (=0.3 MOD), longer on anterior margin of T1, and apical margin of T6 (~1MOD); lateral brushes of long hairs on apical margin of S5 (~2MOD). Structure . Head slightly longer than broad ( 1.10–1.14 mm long; 1.00– 1.02 mm broad, N=4, Fig. 3); stipes and cardo very long (~ 6.5 MOD), stipes slightly longer; clypeus convex, projecting 0.4–0.5 of its length below lower margin of eyes, apical margin of clypeus slightly concave; labrum transverse width:length (4:1), with apical margin slightly more convex than in previous species, gena narrower than eye width, in lateral view (2.0:2.3). OOC:IOC (11:19), UOD:LOD (57:38), LMA:MW (7:10). Basal area of propodeum same length as metanotum and about one third as long as mesoscutellum, in dorsal view (10:10:27). S5 with posterior margin deeply concave with central portion convex ( Fig. 18 ); medio­apical protuberance on S6. Terminalia . S7 with disc large, without apical lobes; apodemal arms rounded ( Fig. 19 ). S8 similar to X. mamigna except the apical process short, not hairy ( Fig. 20 ). Genital capsule as in Fig. 21 ; volsella with digitus not extending beyond cuspis. Female : unknown. Comments . X. haroldotoroi n. sp. is intermediate between the other two species of the genus in several features: the ratio of length to width of the head and the relative length of the malar area; antenna with flagellomere I modified, expanded at apical margin on outer side, as in X. diminuta ; mesoscutellum slightly longer in this species than in the others. Etymology . We take pleasure in naming this species after the collector of the holotype , the late Dr. Haroldo Toro, who made such a large contribution to our understanding of the systematics of South American bees. Material Examined : ( Fig. 13 ) Holotype male. CHILE , Región II , [Pan American Highway], Km 1680, 4.x.1997 , H. Toro coll. ( AMNH ). Paratypes : same data as holotype , except one specimen collected by M. Hormazábal. Holotype and one paratype at AMNH , one paratype each at Universidad Católica de Valparaíso, Chile and York University, Canada . All specimens collected at Prosopis tamarugo Philippi (Mimosaceae) . The junior author could find no P. tamarugo at the type locality when he visited the area in April 2004 .