368 PROCEEDINGS OF THE ACADEMY OF [May, 



Hob.— Yallingup, S. W. Australia, Nov., 1913 (R. E. Turner; 

 Brit. Museum). Superficially exactly like Parasphecodes noachinus 

 Ckll., but the stigma is more obtuse at end, marginal cell shorter, 

 abdomen much more finely punctured, and basal nervure more 

 strongly arched. The punctureless apical area on first abdominal 

 segment is extremely narrow, less than half as wide as that of 

 P. noachinus. These two bees are really congeneric, the genera 

 Parasphecodes and Halictus practically meeting at this point. This 

 and the next are named after Australian naturalists. 



Halictus spenceri sp. n. 



cf. Length slightly over 8 mm.; black, rather robust, with thin 

 white hair, faintly ochreous-tinted on head and on thorax above; 

 abdomen without bands or patches, but a little pale hair at bases 

 of second and third segments, and ventral segments with broad dense 

 bands of white hair; face broad, eyes subemarginate ; mandibles 

 black; clypeus with a low-triangular creamy white patch, its surface 

 punctured, and with no median groove; antenna? long, black? 

 rlagellum moniliform; mesothorax shining (dull in front), with small 

 punctures; scutellum very finely punctured, not bigibbous; area of 

 metathorax semilunar, feebly sculptured, roughened basally with 

 fine rugae, the apical part microscopically areolate; mesopleura not 

 striate; tegulse piceous with a rufous spot, the anterior lateral margin 

 pallid; wings dusky, stigma dark fuscous, nervures light fuscous; 

 first r. n. joining second s. m. at end; third s. m. broader than second; 

 abdomen shining, with very fine obscure punctures; apex with a 

 large, broad, rounded, bright ferruginous plate. Front dull. Legs 

 black, with pale hair. 



Hab— Yallingup, S. W. Australia, Sept. 14-Oct, 31, 1913. (R. E. 

 Turner; Brit. Museum.) I thought at first that this might be the 

 male of H. brazieri, but the structure is too different. It belongs to 

 the group of H. cambagei Ckll., where it is easily distinguished by its 

 large size. Some specimens are only about 7 mm. long. 



Halictus tannaensis sp. n. 



9. Length a little over 7 mm., robust; head broad-oval, dark 

 bluish-green, the clypeus and supraclypeal area stained with crimson; 

 face, front and cheeks with thin dull white hair, vertex with fuscous 

 hair; mandibles black, obscurely reddish at apex; clypeus sparsely 

 punctured; front dull, very finely striate; head truncate posteriorly, 

 the occipital margin abrupt; antenna? dark, nagellum with only the 

 faintest red tint toward end; antennal joints 2 to 5 measuring (length) 

 in microns 128, 128, 144 and 176 respectively; mesothorax and 



