34 
Records of the Australian Museum (2012) Vol. 64 
T. maximus T. brachytomus n.sp. T. pulcherrimus T. lacaris n.sp. 
Figs 24-27. Basal area of hind tibia of Trichocolletes males: (24) T. maximus, (25) T. brachytomus n.sp., (26) T. pulcherrimus, and (27) 
T. lacaris n.sp. 
38 species for which males are known, five, T. brachytomus 
n.sp., T. dives, T. lacaris n.sp., T. pulcherrimus and T. 
tuberatus n.sp., were found to have basitibial areas at least 
as well developed as in T. pulcherrimus (Fig. 26). 
The second criterion used by Michener (1965) was the 
ratio of the lengths of the pterostigma and prestigma. This 
measurement is difficult to make accurately and involves a 
degree of subjectivity. It was found (Table 1, Fig. 28) that 
the ratio for T. pulcherrimus lies in the middle of the range 
for all species. Using 10 specimens each of T. orientalis n.sp. 
and T. venustus, it was estimated that the standard deviation 
of the measurements was 0.1. 
Trichocolletes pulcherrimus males are unique in having 
a combination of unusual characters, but with the exception 
of the loss of the hind tibial spurs, similar characters occur 
separately or in other combinations in a number of species: 
projections are found on the fore trochanters of males of 
T. avialis n.sp. and T. nitens n.sp.; modified legs are found 
in T. aureotinctus, T. avialis n.sp., T. burnsi, T. dives, T. 
dowerinensis, T. hackeri and T. macrognathus n.sp.; and 
modified flagella occur in T. dives and T. gelasinus n.sp.. 
These male characters are not correlated with the female 
characters discussed above and it is concluded that the 
evidence presently available does not support recognition 
of the subgenus Callocolletes. 
Distribution. Southwestern Australia (AW, MAL, SWA) 
(Fig. 111). 
Table 1. Ratio of length stigma to length prestigma in 
forewing of females of some Trichocolletes species. 
Intraspecific variation was determined using 10 specimens 
each of T. orientalis n.sp. and T. venustus. The standard 
deviation of the measurements was 0.1. 
length ratio 
species stigma / 
prestigma 
length ratio 
species stigma / 
prestigma 
T. aeratus n.sp. 
1.50 
T. luteorufus n.sp. 
1.50 
T. albigenae n.sp. 
1.67 
T. macrognathus n. 
sp.1.64 
T. aureotinctus 
1.66 
T. marginatus 
1.69 
T. brachytomus n.sp. 1.70 
T. maximus 
1.48 
T. brunilabrum n.sp. 1.80 
T. micans n.sp. 
1.88 
T. burnsi 
1.85 
T. multipectinatus 
1.87 
T. capillosus n.sp. 
1.44 
T. nitens n.sp. 
1.73 
T. centralis n.sp. 
1.73 
T. orientalis n.sp. 
1.52 
T. chrysostomus 
1.66 
T. macrognathus n. 
sp.1.40 
T. dives 
1.73 
T. pulcherrimus 
1.60 
T. dowerinensis 
1.74 
T. rufibasis 
1.64 
T. dundasensis n.sp. 1.50 
T. sericeus 
1.55 
T. erythrurus 
1.93 
T. serotinus n.sp. 
1.67 
T. gelasinus n.sp. 
1.54 
T. simus n.sp. 
1.60 
T. grandis n.sp. 
1.67 
T. soror n.sp. 
1.61 
T. hackeri 
2.00 
T. tenuiculus 
1.47 
T. lacaris n.sp. 
1.90 
T. tuberatus n.sp. 
1.93 
T. latifrons 
1.55 
T. venustus 
1.43 
T. leucogenys n.sp 
. 1.71 
Trichocolletes rufihasis (Cockerell) 
Figs 6, 39, 72, 112 
Paracolletes rufibasis Cockerell, 1929a, p. 204 (male). 
Trichocolletes (Trichocolletes) rufibasis .—Michener, 1965, p. 80. 
Specimens examined. The holotype S, Eradu, Western Australia, Nicolson, 
AM (K.95635) and the following. South Australia: 8$, Lake Gilles Natl 
Park (33.06°S 136.67°E), 13 Nov. 1975, T. F. Houston & J. A. Herridge, on 
Daviesia nudula, SAM (32-024523-30). Western Australia: 2$, 22 km N 
Bullfinch, 7 Sep. 1979, T. F. Houston, on flowers of Swainsona microphylla, 
WAM (13990-91); 5$, 22 km N Bullfinch, 2-3 Oct. 1981, T. F. Houston, 
on flowers of Mirbelia depressa, WAM (13992-96); S, Charles Darwin 
Reserve, Sep. 2009, R. Leys, AM (K.344826-27); S, 25 km S Cue, 31 Aug. 
1981, G. A. Holloway, AM (K.344531); d 1 , 18 km E Hyden (32.4170°S 
119.0989°E), 10 Oct. 2009, M. Batley, AM (K.344825); 3$, Kalamunda, 
WAM (13785-87); 4$, Kalbarri, 29 Aug. 1970, K. T. Richards, WAA 
(80836,38,46,47); 7 $, 2$, McDermid Rock, 27 Sep.-3 Oct. 1978, T. F. 
Houston et al., on flowers of Daviesia costata, WAM (13971—7,13997,19121); 
$, Mt Jackson, 5-11 Sep. 1979, T. F. Houston, on flowers of Dryandra 
arborea, WAM (13998); S, 14 km NW Narrogin (32.8761 °S 117.0425°E), 
9 Oct. 2009, M. Batley, AM (K.344824); $, 4$, National Park, WAM 
(13769-72); 2$, 2$, Neerabup Nat. Park 15 km NW Wanneroo, 16 Oct. 1994, 
T. F. Houston et al.. on flowers of Daviesia, WAM (13595-99); 8$, Lake 
Gilles Natl Park (33.06°S 136.67°E), 13 Nov. 1975, T. F. Houston & J. A. 
Herridge, on Daviesia nudula, SAM (32-024523-30); <3,16 km S Norseman 
(32.3403°S 121.7575°E), 7 Oct. 2009, M. Batley, AM (K.344823); 30^,7$, 
7 km SSW Norseman, 19 Sep. 1981,1. D. Naumann & J. C. Cardale, ANIC; 
S, Tallering Stn, 1 Sep. 1976, R. P. McMillan, WAM (13788). 
