Batley & Houston: Australian bee genus Trichocolletes 
7 
15(14) Metasomal bands moderately wide, gold; basal suture of clypeus 
V-shaped. T. venustus 
-Metasomal bands narrow, silver or gold; basal suture of clypeus 
various . 16 
16(15) First flagellomere > 2x as long as medial width; clypeal suture 
concave. T. tenuiculus 
-First flagellomere < 2x as long as medial width; clypeal suture 
various . 17 
17(16) Metasomal bands gold; clypeal suture shallow V-shaped. T. fuscus n.sp. 
-Metasomal bands silver; clypeal suture straight . T. orientalis n.sp. 
18(1) Metasomal bands silver, gold or white. 19 
-Metasomal bands absent or indistinct . 36 
19(18) Facial hair brown, simple . 20 
-Facial hair white or pale brown, plumose . 21 
20(19) Prepygidial fimbria black . T. eremophilae 
-Prepygidial fimbria orange . T. multipectinatus 
21(19) Malar space 2 Ax basal mandibular width; scutal hair dark 
brown medially with contrasting pale perimeter. T. macrognathus n.sp. 
-Malar space l A x basal mandibular width or less; scutal hair 
uniformly coloured. 22 
22(21) Hind tarsal claw simple or with minute inner ramus (Trichocolletes 
simus n.sp.). 23 
-Hind tarsal claw with distinct inner ramus. 27 
23(22) Clypeus flat or declivous, not protuberant . 24 
-Clypeus protuberant, transversely convex. 25 
24(23) Clypeus flattened, polished with broad irregular depressions. T. platyprosopis n.sp. 
-Clypeus deflexed near base, polished with close, regular punctures. T. simus n.sp. 
25(23) Clypeus almost impunctate, apical half orange-brown . T. dives 
-Clypeus closely to densely punctate, mostly black. 26 
26(25) Narrow gold metasomal bands; prepygidial fimbria black; body 
length c. 15 mm . T. marginatus 
-Wide gold metasomal bands; prepygidial fimbria gold; body 
length c. 13 mm. T. nitens n.sp. 
27(22) Metasoma partly or wholly red-brown. 28 
-Metasoma black. 29 
28(27) Margin of pygidial plate with deep, narrow emargination. T. soror n.sp. 
-Margin of pygidial plate with at most a minute emargination . T. mfibasis 
29(27) Supraclypeal area at distinct angle to clypeus. 30 
-Supraclypeal area and clypeus nearly coplanar. 31 
30(29) Clypeus coarsely and densely punctate. T. sericeus 
-Clypeus openly punctate . T. chrysostomus 
31(29) Labrum 0.75x as long as wide, tectiform (Fig. 15); metasomal 
bands white. T. gelasinus n.sp. 
-Labrum about half as long as wide, uniformly convex; meta¬ 
somal bands gold. 32 
