Andrena tiaretta Kratochwil, 2015, s.str.

C o l o u r Head (Fig. 4a): black integument (one specimen from Algeria with brown coloured integument); scapus black/brown; flagellomeres 1 and 2 as a rule darker than flagellomeres 3-10, flagellomeres (1, 2) 3-10: upper side brown, lower side light brown (one specimen from Algeria light brown flagellomeres); mandible black with a reddish tip. Mesosoma (Fig. 4b): black; femur, tibia and basitarsus black (dark brown) (Fig. 7a) (two specimens from Algeria brown to reddish-brown); mediotarsi pars parte reddishbrown (two specimens from Algeria reddish-brown); wings light toned, veins in most cases reddish-brown (Fig. 1a) (two specimens from Algeria yellowish), differing to DARDÓN et al. (2014): ‘pale brown’; pterostigma reddish-brown marginated, in the centre reddish or reddish-yellowish (Fig. 1a) (two specimens from Algeria yellowish). Metasoma (Fig. 7b): T1-4 black, with black to dark reddish-brown depression zone (one specimen from Algeria with reddish brown depression zone); T5 translucent, reddishbrown.

P u b e s c e n c e Head (Fig. 4a): frontview: paraocular area with whitish-yellowish hairs from malar area, overtopping line of antennal socket, hair length different; sideview: paraocular area with whitish-yellowish hairs, no brownish hairs between antennal socket and fovea facialis (differing to DARDÓN et al. 2014: ‘In some paratypes, scarce brown hairs are present…’); clypeus with whitish-yellowish hairs, but not with dark hairs; scapus with dorsal longer, ventral shorter whitish-yellowish hairs; genal area with whitish, in two cases (two specimens from Algeria) with whitish-yellowish hairs, upper zone of genal area with brownish hairs; facial fovea with velvety appearance of whitish iridescent pubescence, upper zone with reddish-brown hairs (one specimen from Spain, one from Morocco with whitish-reddish-brown hairs); vertex with some long whitishyellowish and slightly reddish hairs. Mesosoma (Fig. 4b): mesoscutum and scutellum with only some shorter whitish-yellowish hairs, with yellowish-reddish hairs laterally; mesepisternum with longer whitish-yellowish hairs; propodeal corbicula with some whitish hairs, some hairs in the centre; trochanteral and femoral flocculus well developed with whitish hairs; tibial scopa with whitish hairs dorsal and ventral, and in the rule some reddish hairs dorsobasal (Fig. 7a); Metasoma (Fig. 7b): T2 and T3 (T4) with lateral fragmentary hair bands; T4 hair rows between tergite and tergite depression; T5: yellowish(-reddish) in the center, yellowish-white marginally; T6: reddish-brown hairs (one specimen from Morocco with reddish hairs).

S t r u c t u r e.Head (Fig. 4a): vertex surface structure with granulate punctures (rough microsculpture); face above antennal fossae (frons) with longitudinal rugulae well developed, interrugal space shiny and impunctate; inner eye margin converging weakly; clypeus more or less convex with central area flattened, slightly hammer-blow-like microsculpture, not really dull but slightly shiny, chagreened at the base, without or with fragmented impunctate median line, clearly punctured (basal area: 14 µm, apical area: [14] 28 µm), punctures more or less scattered in the centre (according to WARNCKE 1974: ‘totally chagreened, dull, punctures uniformly distributed’; according to DARDÓN et al. 2014: ‘dull microsculpture, without obvious punctures’), labrum process trapezoidliguliform; genal area with a distinct microsculpture with striated structures (small longitudinal rugulae) in the apical half; facial fovea narrowed at its lower zone, the top two times wider than the lower zone. Mesosoma (Fig. 4b): pronotum with transverse shagreened microsculpture; mesoscutum hammer-blow-like microsculpture, not really dull but rather shiny, distinctly punctured (PD = 0.14-0.28 μm), interspaces between punctures predominantly two or three puncture diameters, in front chagreened (according to WARNCKE 1974: ‘totally chagreened, dull, finely punctured’; according to DARDÓN et al. 2014: ‘dull microsculpture, shallow punctures’), with developed parapsidal lines; scutellum similar to scutum but not chagreened in front; metanotum rough microsculpture, laterally with punctures (according to DARDÓN et al. 2014: ‘unpunctured’); propodeum: clearly granular and rugose structure, in the centre and in the dorsolateral area, long basal lamina, no lateral boundary line. Mesepisternum with a shiny microsculpture. Metasoma (Fig. 7b): hammer-blow-like microstructure, not really dull but rather shiny (according to DARDÓN et al. 2014: ‘dull microstructure’), T1 with very scarcely distributed flattened punctures (according to DARDÓN et al. 2014: ‘unpunctured’), T2-T4 clearly but very scattered punctured, punctures especially lateral, punctures not only restricted to the side in contrast to the description of DARDÓN et al. (2014) (PD = 0.14- 0.28 μm), posterior depression of (T1) T2 not well marked (but in specimens of Spain much more developed), posterior depression of T3-T4 marked well. The depression grade of the tergites differs between T2, T3 and T4 (range 0.39 to 0.47 times the length of the terga (DARDÓN et al. 2014: 0.4 times). The depression zones are not clearly punctured.