516 Mr. T. D. A. Cockevell — Descriptions and 



stigma sepia; outer t.-c. and r. ii. weakened ; first r. n. 

 meeting second t.-c. : hind spur with a few large teeth. 

 Abdomen shining, finely punctured; venter with stiff white 

 hair, but no curled scopa. 



Hub. Tambourine Mountain, Queensland, at flowers of 

 Helichrysum bracteatum, Oct. 27, 1912 (H. Hacker, Queensl. 

 Mas. 84); also a cotype from Brisbane, Jan. 17, 1912 

 {Hacker ; Queensl. Mus. 31). 



Easily known from H. griseovittatus by the absence of 

 hair-bands at bases of abdominal segments. 



The following three species are very like H. heUchrysi, 

 the four being separable as follows : — 



Flagellum dark, faintly brownish beneath II, imitans. 



Flagellum red beneath 1. 



1. Mesothorax strongly punctin-ed ; scutellum with 



sparse small punctures ; hiud margin of fourth 

 abdominal segment broadly whitish hyaline .... H. heUchrysi. 

 Mesothorax more finely punctured ; bind margin 

 of fourth segment not broadly whitish hyaline . . 2. 



2. Lateral bases of abdominal segments 2 to 4 broadly 



white-tomentose ; scutellum duller, more closely 



punctured H. victoriellus. 



Lateral bases of abdominal segments 2 to 4 

 not white-tomentose ; scutellum shining, very 

 minutely and more sparsely punctured //. plvbeius. 



Halictus imitans, sp. n. 



$ . — Length about G| mm. 



Black, robust, witii scanty dull white hair, faintly creamy 

 on bead and thorax above ; mandibles with the apical part 

 variably dark reddish ; antennae entirely dark ; clypeus 

 shinitig, with sparse weak punctures ; front dull, somewhat 

 glistening at sides, the middle punctui'cd and feehly striate ; 

 mesothorax glistening, but quite strongly and densely 

 punctured ; scutellum with minute, rather close punctures ; 

 area of metathorax large, finely and regularly striate; 

 hind spur with a large subbasal tooth ; tegulae piceous, with 

 a large rufous spot. Wings dusky, nervures and stigma 

 dusky red ; outer r. n. and t.-c. weakened ; first r. n. meeting 

 second t.-c. Abdomen shining, very minutely punctured; 

 lateral bases of second and following segments with rather 

 inconspicuous patches of dull white tomentum, on third 

 segment twice as extensive as on second ; venter with 

 abundant white hair. 



Hub. Victoria. Feb. 1901 (C. F. ; Turner coll.). Two 

 specimens. 



