Colletes albomaculatus

Key to the males of the Colletes albomaculatus View in CoL species-group

Species of the C. albomaculatus species-group are easily distinguishable from all other Palaearctic Colletes by a combination of punctate tegulae and a medially raised and conspicuously convex metanotum that has an apical drop almost overhanging the horizontal part of the propodeum (KUHLMANN & SMIT 2018, Fig. 10 View Figs 7-10 ). Colletes nasutus SMITH can be placed in this species-group, too, but has a distinctly elongate face (genae about 2 times longer than width of base of mandibles) that is very different from the more round or oval head shapes of the other species.

1 Punctation of vertex between lateral ocellus and eye sparse and more dispersed (i = 1- 2d), between punctures polished and shiny; apical margin of T1 slightly and gently depressed.............................................................................................................................2

- Punctation of vertex between lateral ocellus and eye very dense (i <0.5d), punctures touching each other; apical margin of T1 sharply truncate and deeply depressed ( Figs 1 View Figs 1-2 , 3, 5) .....................................................................................................................................3

2 Mesosoma dorsally with a broad transversal band of black hair covering the posterior part of the scutum and the anterior part of the scutellum; gonostylus very short, at the base wider than long.......................................................................... C. dorsalis MORAWITZ View in CoL

- Mesosoma dorsally without black hairs; gonostylus long, at the base more than twice as long as wide ................................................................................ C. albomaculatus ( LUCAS) View in CoL

3 Apical depression of T1 broader, slightly wider than width of the antenna (Fig. 5), S7 narrower and squarish (Fig. 6)........................................................... C. alfkeni NOSKIEWICZ View in CoL

- Apical depression of T1 narrow, slightly narrower than the width of the antenna (Figs 1, 3), S7 broader and of different shape ( Figs 2 View Figs 1-2 , 4) .............................................................4

4 Punctation on disc of T1 coarser and slightly more dispersed (i = 0.5-1d) (Fig. 3), S7 smaller (Fig. 4)................................................................................. C. punctatus MOCSARY View in CoL

- Punctation on disc of T1 finer and very dense (i <0.5d) ( Fig. 1 View Figs 1-2 ), S7 larger ( Fig. 2 View Figs 1-2 ).............. ....................................................................................................... C. jansmiti KUHLMANN