50 G Mr, T. D. A. Cockerell — Descriptions and 



ridges^ joined at intervals by little transverse ones^ so as to 

 produce a cancellated effect ; at sides the plicsR run over the 

 edge of the area proper. Legs black, the middle and hind 

 femora dark greenish ; hind femora strongly concave be- 

 neath ; hind spur with three or four sliort teetli ; tegulse 

 rufous^ hyaline in front. "Wings clear hyaline ; stigma dark 

 brown, uervures sepia ; outer r. n. and t.-c. evanescent; first 

 r. n. meeting second t.-c. Abdomen broad, shining steel- 

 blue, with slight purple tints ; venter with a curled white 

 floccus. 



Hah. Caloundra, Queensland, Oct. 30, 1912 (H. Hacker, 

 Queensl. Mas. 8'3). 



H. caloundrensis is of the immediate group of H. hehri, 

 transvo/ans, and jlindersi, but is easily separated by the 

 remarkable sculpture of the mcsothorax. 



Halictus urbanus, Smith. 



Stradbroke Island, Oct. 2, 1911 {Hacker, Queensl. Mus. 

 51). 



Halictus lanarius, Smith. 



Females {lanarius, Sm.) : Brisbane, Jan. 17, 1912 {Hacker; 

 Queensl. Mus. 16) ; Oakleigh {Hill; Nat. Mus. Vict. (i9). 



Males Qaniigiiiosus, Sm.) : AVhittlesea (J. A. Kershaw ; 

 Nat. Mus. Vict. 97) ; Tambourine Mtn., Oct. 27 {Hacker; 

 Queensl. Mus. 77) ; Windsor, Victoria {French ; Froggatt, 

 82); Sydney, N.S.W. {Froggatt, 117); Timboon (./. A. 

 Kershaw; Nat. Mus. Vict. 75). 



Halictus hamatostoma, sp. n. 



J . — Length about 4| mm. 



Kol)ust, with dull white hair ; head and thorax black, Avith 

 labrum, mandibles (except base), and lower margin of clypeus 

 bright ferruginous; mcsothorax and scntcllum shining dark 

 bluish green ; sca[)e black, flagellum bright apricot-colour, 

 .^.lightly dusky above ; mcsothorax very distinctly but not 

 very densely punctured, the punctures small; middle of 

 scntcllum distinctly punctured ; area of nictathorax snuill 

 and short, irregularly wrinkled ; knees and tarsi bright 

 ferruginous ; teguhc dark reddish. AMngs clear, ncrvurcs 

 and stigma very light testaceous ; outer t.-c. and r. n. evan- 

 escent. Al)domen piceous, with tlic hind margins of the 

 segments j)allid ; a rather strong constriction between first 

 and second segments. 'I'his malo has exactly the build of a 

 normal fcuiah;, with lobust body and short nntcnmr. 



