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



stigma short, rufo-piceous, iiervures redder ; outer t.-o. and 

 r, n. almost wholly invisible, but the shadowy third s.m. 

 very high and short. Femora black, the knees, tibise, and 

 tarsi ferrugiuous, middle aud hind tibicesufi'used with dusky. 

 Abdomen dark, with a strong tinge of blue-green or bluish, 

 hind margins of segments piceous, first segment shining, the 

 others duller ; a cnrled scopa of white hair on abdominal 

 venter. 



Microscopical characters : — Front lineolate and punc- 

 tured ; mesothorax minutely tessellate and with very minute 

 punctures ; tegulae impunctate ; first abdominal segment 

 with excessively minute punctures, the other segments feebly 

 transversely striolate and with very minute piliferous punc- 

 tures ; hind spur with two long blunt teeth. 



Hab. Eribie Island, Queensland, Nov. 2, 1913 (H. 

 Hacker). Queensland j\Ius. 114. 



The following table separates it from its nearest rela- 

 tives : — 



Stigma pale testaceous ^oralis, Sm. 



Stigma darli fu.^coiis or rufo-fuscous 1. 



1. Apical part of stigma abbreviated ; mesothorax 



darli blue : smaller species juivonellus, Ckll, 



Stigma normal ; mesothorax dark green : larger 



species dampieri, Ckll. 



Halictus callaspis, sp. n. 



$ . — Length about 6 5 mm. 



Head and thorax with loose white hair, abundant at sides 

 of thorax ; head broad, clypeus prominent, its basal margin 

 little above level of lower ends of eves : head olive-srreeu, 

 tinged with brassy about bases of antennae and on supra- 

 clypeal area ; clypeus shining peacock-green, its upper 

 margin very narrowly purple ; antennae black, flagellum 

 obscurely reddish beneath toward apex : mesothorax yel- 

 lowish green, much brighter than head, granular but some- 

 what glistening, not distinctly punctured ; scutellum more 

 shining, peacot-k-greeu ; I'est of thorax rather obscure olive- 

 green ; area of metathorax very finely irregularly lineolate ; 

 posterior truncation not sharply defined ; tegulae reddish. 

 AVings hyaline, stigma amber-colour ; outer r. u. and t.-c. 

 almost obsolete ; first r. n. meeting second t.-c. Femora 

 dark olive-green ; knees more or less reddish ; tibiae and 

 basitarsi piceous, with much white hair ; small joints of tarsi 

 dull ferrugiuous. Abdomen shining olive-green, without 



