1930 ] 
Australian Bees 
147 
Nomia williamsi n. sp. 
$ . Length about 7.3 mm., anterior wing 5.4 mm. ; black 
with white hair ; mandibles dark rufous apically, face 
rather broad, densely covered with white hair; scape en- 
tirely black (in N. argentifrons Sm. it is rufotestaceous in 
front) ; flagellum long, reaching scutellum, black above, 
dull red beneath; mesothorax and scutellum closely punc- 
tured; postscutellum with dense white (not at all fulvous) 
tomentum; area of metathorax broadly triangular, densely 
rugosoplicate, dull ; sides of metathorax dull, except a broad 
shining band just below sides of area; mesopleura dull, 
anteriorly with white tomentum; tegulae clear testaceous; 
wings hyaline, the apical region faintly clouded; stigma 
large, light orange fulvous, nervures pale testaceous; legs 
reddish black, with the knees bright ferruginous, tibiae red 
at extreme apex, tarsi pale reddish, the basitarsi more 
whitish ; hind legs not modified ; abdomen moderately shin- 
ing, hind margins of first two tergites reddened ; apices of 
segments with rather narrow bands of dense white hair, 
broadly interrupted on first two; venter simple, except for 
a large patch of pale fulvous-tinted tomentum. 
Halifax, June 1-17, 1919 (F. X. Williams). Very close 
to N. halictella Ckll., but smaller, with white instead of 
fulvous hair, and darker flagellum. 
Nomia babindensis n. sp. 
$ . Length about 6 mm., anterior wing 4.4 ; robust, 
indigo blue, the abdomen mainly black, but blue on first 
tergite and in the apical depressions of the others, second 
tergite with a shining brown hind margin. Head broad, 
face with very thin dull white hair, vertex with very long 
erect black hair ; mandibles rufescent at apex ; clypeus shin- 
ing, broadly black apically, bigiblous, with a median de- 
pression; supraclypeal area with a shining median pale, 
slightly pinkish, band; front dull; antennae dark; a little 
black hair on scutellum, but thorax above very bare ; meso- 
thorax dullish, minutely punctured ; scutellum weakly bigib- 
bous; area of metathorax short, dull, very finely sculp- 
tured ; mesopleura shining blue in middle ; tegulae very dark 
