508 Mr. T. D. A. Cockerell — Descriptions and 



This is easily known Prom the male of H. dampieri by the 

 smaller size, much shorter anteunsBj and absence of a yellow 

 band on clypeus. 



Hab. Brisbane, May 13, 1912 {H. Hacker, Queensl. jSIus. 

 65). 



Halictus bicingulatus , Smith. 



? .—Sydney, N.S.W., Nov. 29 and Dec. 1. 1910 (Froggatt, 

 131, 119) ; Kenthurst, N.S.W., Feb. 1904 {Gallurd ; Irog- 

 gatt coll. 126) ; Brisbane, Nov. 5 and 25, 1905 (Froggatt 

 coll. 166, 167). 



The male from Kelvin Grove, Brisbane, Nov. 27, 1911 

 [Hacker ; Queensl. Mus. 46), is like H. leai, except that the 

 abdomen is black, without bands or spots. 



Halictus peraustralis, Cockerell. 



Sydney, N.S.W., Dec. 1, 1910 [Froggatt, 113, 130); 

 Stradbroke I. {Hacker, Queensl. Mus. 53). 



Halictus tertius, Dalla Torre (riijipes, Sm.). 



Croydon [S. W. Fulton, Nat. Mus. Victoria, 267, 268). 



AVith the above material before me I am able to revise the 

 H. bicingulatus group, and separate the females of the species 

 as follows : — 



Wings reddish, costal region not blackened ; 



disc of mesothorax finely and densely, but 



distinctly punctured 1. 



"Wings with the costal region conspicuously 



suffused with blackish ; mesothorax dilie- 



rently sculptured 2. 



1 . Hind margins of abdominal segments hardly or 



not reddened hicingulatus, Smith. 



Hind margins of abdominal segments broadly 



ferruginous hicingidatus, var. leai 



2. Disc of mesothorax glaucous, shining, sparsely [{//. leai, CklL). 



punctured ; scape and lower margin of 



clypeus dark or obscure reddish tertius, 1). T. 



Disc of mesothorax dull, appearing minutely 

 granular under a lens; scape bright ferru- 

 ginous, lower margiu of clypeus broadly 

 red peraustrnlis, Ckll. 



H. peraustralis has a patch of very bright orange tomentum 

 on the postscutcllum, which is absent from //. tertius. In 

 1901' I placed /<?r/z«.9 as a synonym of bicingidatus, having 

 comi)ared specimens in the British Museum. Smith evi- 

 dently confused the species of this grou]), the types of the 



