1930 ] 
Australian Bees 
145 
Megachile rhodogastra Cockerell 
$ . Length about 10 mm. ; black, parallel-sided, rather 
robust; face with much creamy- white hair, cheeks with 
long pure white hair; antennse long, black, the flagellum 
very faintly reddish beneath; mandibles black; clypeus 
very densely punctured, without a smooth line ; mesothorax 
dullish, extremely densely and finely punctured; scutellum 
closely punctured ; hair of thorax white, but some black on 
scutellum, as also on vertex; tegulse very dark rufous; 
wings brownish, especially stained along the veins; first 
recurrent nervure twice as remote from base of second 
cubital cell as second from apex; legs black, tibiae swollen, 
anterior coxae not spined, anterior tarsi simple, middle 
tarsi with long grey hair behind, hind tarsi with very 
bright red hair on inner side ; apical part of abdomen with 
tegument red. 
3 $ , Halifax, May 9-15, and June 1-17 {Williams). The 
above descriptive notes are from one of the specimens 
which seemed to be different, having the hind tarsi with 
bright ferruginous hair, and lacking the thick black fringe 
posteriorly. After close study, I conclude that there is 
only one variable species, but the matter deserves further 
study in the field. 
Megachile cetera Cockerell 
1 2, Halifax, June (Williams) . 
Nomia tomentifera Friese 
8 $, 1 S, Babinda, April 8-16 (Williams) ; 1 2, Ku- 
randa, April 16 (Williams). 
Nomia darwinorum Cockerell 
6 $ , 2 2 , Halifax, May 9-15, June 1-17 (Williams) ; 2 2 , 
Babinda, April 18 (Williams). This is precisely N. dar- 
winorum, described from the male, collected by Turner at 
Port Darwin. The female agrees with the earlier de- 
scribed N. rubroviridis Ckll., from the northwest coast, 
except that the flagellum is variably reddened beneath, and 
the hair of the apical tergites is very dark fuscous, not 
