Trichocolletes, Cockerell, 1912

Batley, Michael, 2012, Revision of the Australian Bee Genus Trichocolletes Cockerell (Hymenoptera: Colletidae: Paracolletini), Records of the Australian Museum (Rec. Aust. Mus.) 64 (1), pp. 1-50 : 6-8

Key to females of the genus Trichocolletes

1 Eyes hairy .................................................................................................................................. 2

—— Eyes with minute setae only .................................................................................................... 18

2(1) Metasoma red-brown with indistinct gold bands ....................................... T. brachytomus n.sp.

—— Metastoma with distinct bands .................................................................................................. 3

3(2) Labrum dark brown or black, rarely with orange-brown suffusions ......................................... 4

—— Labrum clear orange-brown, rarely with darker suffusions ...................................................... 9

4(2) Hind tarsal claw with small inner ramus ................................................................................... 5

—— All claws simple ........................................................................................................................ 7

5(4) Labrum with medial tubercle .......................................................................... T. tuberatus n.sp.

—— Labrum uniformly convex ......................................................................................................... 6

6(5) Clypeus with moderately small punctures and reticulate interspaces ................. T. micans n.sp.

—— Clypeus with coarse, almost contiguous punctures .................................... T. brunilabrum n.sp.

7(4) Gena half as wide as eye; vertex not elevated ( Figs 12–13 ) ............................... T. lacaris n.sp.

—— Gena c. 2 ⁄ 3 as wide as eye; vertex elevated ( Figs 10–11 ) ........................................................... 8

8(7) Scutal hair ferruginous, dense; clypeus flattened medially .............................. T. maximus n.sp.

—— Scutal hair pale orange, close; clypeus uniformly convex ................................. T. grandis n.sp.

9(3) Clypeus flattened sagittally ..................................................................................................... 10

—— Clypeus transversely convex, not flattened ............................................................................. 14

10(9) Pygidial plate with deep linear emargination ..................................................... T. dowerinensis

—— Pygidial plate with at most small emargination ...................................................................... 11

11(10) Metasomal integumental bands wide, brassy ..................................................... T. aeratus n.sp.

—— Metasomal integumental bands narrow, silver ........................................................................ 12

12(11) Length subantennal suture> ½ dorsal width clypeus .................................... T. capillosus n.sp.

—— Length subantennal suture <½ dorsal width clypeus ............................................................. 13

13(12) Lateral epistomal suture curved .................................................................... T. leucogenys n.sp.

—— Lateral epistomal suture straight ................................................................. T. dundasensis n.sp.

14(9) Malar space short (length c. 0.1× basal mandibular width) ............................ T. albigenae n.sp.

—— Malar space> 0.2× basal mandibular width ........................................................................... 15

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> 2× as long as medial width; clypeal suture concave ................................................................................................................... T. tenuiculus

—— First flagellomere <2× 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 ⁄ 3 × basal mandibular width; scutal hair dark brown medially with contrasting pale perimeter ..................................... T. macrognathus n.sp.

—— Malar space ¼ × 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. rufibasis

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 0.75× as long as wide, tectiform ( Fig. 15 ); metasomal bands white ...................................................................................................... T. gelasinus n.sp.

—— Labrum about half as long as wide, uniformly convex; metasomal bands gold ..................................................................................................................... 32

32(31) Scutal hair dark grey or grey-brown; labial palpus <0.5× post palpal part of galea ...................................................................................................... T. hackeri

—— Scutal hair pale or mid-brown; labial palpus> 0.5× post palpal part of galea ............................................................................................................................. 33

33(32) Hind tarsal claw only with small inner ramus .................................................. T. centralis n.sp.

—— Hind tarsal claw with large inner ramus .................................................................................. 34

34(33) Inner hind tibial spur with c. 7 teeth; body length c. 15 mm .......................... T. luteorufus n.sp.

—— Inner hind tibial spur with c. 10 teeth; body length c. 12 mm ................................................. 35

35(34) Metasomal bands pale gold or silver with broad ferruginous anterior margin .................................................................................................... T. aureotinctus

—— Metasomal bands uniform gold ........................................................................ T. serotinus n.sp.

36(18) Metasoma orange-brown ......................................................................................................... 37

—— Metasoma black ....................................................................................................................... 39

37(36) T2 without lateral black marks ........................................................................... T. pulcherrimus

—— T2 with black marks laterally .................................................................................................. 38

38(37) Impunctate area near antennal bases; tarsal claws simple ...................................... T. erythrurus

—— Face punctate near antennal bases; tarsal claws with large inner rami ............................................................................................................................ T. rufibasis

39(36) T2–4 with white hair laterally; tarsal claws with large inner rami ................................. T. latifrons

—— Metasoma without white hair; tarsal claws simple ....................................................... T. burnsi

Figures

Figs 10–13. Faces of female Trichocolletes with elevated (10 and 11) or normal (12 and 13) vertex.

Figs 14–15. Trichocolletes gelasinus n.sp. (14) apex of male flagellum (15) clypeus and labrum of female.