40 
Records of the Australian Museum (2013) Vol. 65 
Female specimens of the undescribed species A to D 
(Maynard, 1991) were compared by Dr Terry Houston of 
the Western Australian Museum with photographs of the 
new species. Pollen from bees and flowers was stained with 
Calberla’s fluid and examined with a compound microscope. 
Descriptions are arranged alphabetically. Authorship of 
newly described species is in accordance with Article 
50.1 and Recommendation 50A of International Code of 
Zoological Nomenclature. MB is designated as the author 
of the new names. 
Some morphological features of 
diagnostic importance 
Labrum. The labrum of four new species has an elongated 
apical area so that the labrum is divided horizontally by a 
strong carina (Fig. 1). The apical part is strongly concave 
while the basal part is either concave, medially depressed 
or, rarely, smoothly convex. The labrum of the fifth species 
has a very short apical area and appears smoothly convex. 
Male hind tibia. Males of all the newly described species, 
and most of those previously described (Maynard, 1991), 
have a modified hind tibia, with the apical half compressed 
on the anterior side (Fig. 2). The narrow ridge thus formed 
bears six to eight stiff setae that are frequently hooked. The 
maximum width of the hind tibia relative to the tibial length 
is a useful external character for separating species. 
Male hind tibial spurs. All males have two hind tibial spurs 
with minutely ciliate or finely pectinate margins. The outer 
spur is shorter than the inner, but difference in length varies 
between species. The shape of the inner spur varies from 
almost straight to flattened and strongly recurved (Fig. 3). 
Male sterna. Males of the newly described species have 
apical fringes of hair on S3 and S4 and a raised longitudinal 
ridge basally on S6 (Fig. 4). The only noticeable variation 
between the species was in the density of the apical hair 
tuft on S6. 
Systematics 
Key to species of Leioproctus (Protomorpha) (modified from Maynard, 1991) 
1 Male (hind tibia without scopa). 2 
- Female (hind tibia with scopa) . 10 
2(1) Hind coxa covered with long, dense hair . 3 
- Hind coxa lacking long, dense hair . 4 
3(2) Anterior margin of hind basitarsus strongly curved; frons 
obscured by dense, white hair . L. tarsalis (Rayment) 
- Anterior margin of hind basitarsus almost straight; frons not 
obscured by hair . L. plautus Maynard 
4(2) Hind tibia with row of stout setae on anterior margin. 5 
- Hind tibia unmodified. L. minutus (Cockerell) 
5(4) Hind basitarsus with narrow basal projection . L. alloeopus Maynard 
- Hind basitarsus without basal projection. 6 
6(5) Anterior margin of hind basitarsus with large apical projection. L. crispus n.sp. 
- Hind basitarsus with at most a slight apical extension. 7 
7(6) Hind tibial spurs flattened and strongly recurved. 8 
- Hind tibial spurs not flattened, almost straight. 9 
8(7) Hind femur with broad projection on outer face; outer 
hind tibial spur ca 0.3 x as long as inner spur; lower gena 
concave. L. nix n.sp. 
- Hind femur without projection; outer hind tibial spur ca 0.7x as 
long as inner spur; lower gena convex. L. latifrons n.sp. 
9(7) Hind tibial setae weak; mandible with preapical tooth . L. gurneyi n.sp. 
- Hind tibial setae stout; mandible simple . L. gibber n.sp. 
10(1) Inner hind tibial spur strongly curved . 11 
- Inner hind tibial spur almost straight. 12 
