TABLE 2 in Taxonomic revision of the garrulus species group in the bee genus Hylaeus Fabricius, 1793 (Hymenoptera: Apoidea, Colletidae)

TABLE 2. Main diagnostic characters to identify the males of the three Prosopis species groups and H. gazagnairei (Vachal, 1891). In bold are highlighted the most distinctive characters that are unique to a group. CharactersH. gazagnaireigibbus groupvariegatus groupgarrulus group(Vachal)FaceWeakly depressedFlat below antennaeWith crescent-shapedWith crescent-shapedbelow antennae (Fig.(Fig. 3D).depression belowdepression below3A).antennae (Fig. 3G).antennae (Figs 6A, 6F,6K).ScapeDilated (Fig. 3A),Not dilated, linearDilated (Fig. 3G),Dilated andposterior surface(Fig. 3D), posteriorposterior surfacetrapezoidal (Figs 6A,entirely concave,surface flat, withoutconcave with6F, 6K), posteriorwithout furrow.furrow.longitudinal furrow.surface entirelyconcave.PropodeumSimilar to female (seeSimilar to female (seeSimilar to female (seeSimilar to female (Fig.Fig. 2A).Fig. 2D).Fig. 2G).8D).TibiaeRed and yellow.Black and yellow.Black and yellow.Black and yellow.T1Tegument tesselate,TegumentTegument uniformlyTegument uniformlyuniformly coveredtransversallycovered with densecovered with close towith dense to closeshagreened withto close mediumsparse small puncturessmall punctures (Fig.fine to minute andpunctures and smooth(Fig. 8E), IS smooth to3B).irregularly scatteredIS (Fig. 3H).lightly shagreened.punctation (Fig. 3E).S3 callus (if present)With U-shapedFlat (Fig. 3F).With pair of humpsWith transverse keelelevation (Fig. 3C).(Fig. 3I).(Fig. 6M) or U-shapedelevation (Figs 6C,6H).S7With short simpleWith long plumoseWith short simpleWith short simplehairs and shorthairs and short andhairs and remarkablyhairs and remarkablyproximal lobe, lessbroad proximal lobe,long and narrow linearlong and narrow linearthan 2× longer thanabout as long as theproximal lobe, 2×proximal lobe, 2×distal lobe (Fig. 4A).distal lobe (Fig. 4F).longer than distal lobelonger than distal lobe(Fig. 4K).(Fig. 8F).S8Produced apically intoWith broadlyProduced apically intoProduced apically intolong and narrow spinesubtruncate tolong and narrow spinelong and narrow spine(Fig. 4B).sinuate tip (Fig. 4G).(Fig. 4L).(Fig. 8G).GonobaseNarrower thanLarger thanNarrower thanNarrower thangonoforceps (Fig. 4C)gonoforceps (Fig.gonoforceps (Fig.gonoforceps (Fig. 6D).4H).4M).GonoforcepsStraight to slightlyStraight, withoutStraight to slightlyArcuate or angulatecurved inwards withbasal depression (Fig.curved inwards withapically, with basalbasal depression (Fig.4H).basal depression (Fig.depression (Figs 6D,4C).4M).6I, 6N).VolsellaDigitus long, large inDigitus long, large inDigitus long, large inDigitus short, flat inlat. view (Fig. 4D).lat. view (Fig. 4I).lat. view (Fig. 4N).lat. view (Fig. 8H).Penis valve (seeWithout membraneousWithout membraneousWithout membraneousWith membraneousdiagnosis)ventral subapical lobe,ventral subapical lobe,ventral subapical lobe,ventral subapicalpenis fovea shallowpenis fovea shallowpenis fovea shallowlobe, penis fovea very(Fig. 4E).(Fig. 4J).(Fig. 4O).deep (Fig. 6J).