Bees of the Azores: an annotated checklist (Apidae, Hymenoptera) Author Weissmann, Julie A. Author Picanco, Ana Author Borges, Paulo A. V. Author Schaefer, Hanno text ZooKeys 2017 642 63 95 http://dx.doi.org/10.3897/zookeys.642.10773 journal article http://dx.doi.org/10.3897/zookeys.642.10773 1313-2970-642-63 E8512D085E224794AE2331FA1F1BD606 E8512D085E224794AE2331FA1F1BD606 Hylaeus signatus (Panzer) Description. Medium-sized black bee (total length 7-9 mm in both sexes, wing length 4.5-5.5 mm in females and 4-6 mm in males) with roundish face and conspicuous yellowish-white face markings, without curved grooves (fovea) along eye margin; mandibles and legs black; white hair bands on lateral sides of tergite 1 (Fig. 6b). Distinguishing features. Relatively large; male with mask not exceeding insertion point of antennae (Fig. 5 c), female face pattern with the two spots larger than in Hylaeus pictipes and more triangular in outline (Fig. 5e); Reseda specialist. General distribution. Madeira (introduced); North Africa; Eurasia, from Portugal in the West to northern Scandinavia and Uzbekistan in the East. Distribution in the Azores. All islands except Sao Jorge. First record. 2001 (Santa Maria; H. Schaefer, unpublished data). Nesting. In existing cavities (twigs, earth, abandoned nests of other hymenoptera , etc.), sometimes in dense aggregations. Social behaviour. Solitary bee. Foraging. Oligolectic, usually Reseda specialist, but in the Azores also observed on Tamarix africana ( Tamaricaceae ). Phenology. June-August. Material. Corvo (Vila do Corvo), 04.08.2014, 1 male; Graciosa, June 2012, 3 females, 7 males on Tamarix ; Terceira (airport), 08.08.2014, 1 female, 1 male; Santa Maria, 1 female, all leg. H. Schaefer, coll. TUM (B8-B20; B45). The COI sequence of specimen H. Schaefer B12 (TUM), acc. no. KX824778, is identical to a Hylaeus signatus sequence from Germany (KJ837965, see Fig. 2).