512 I\lr. T. D. A. Cockerell — Descriptions and 



Halictus seductus, sp. n. 



? . — Length about 10 mm. 



Black, robust, with greyish-white hair, mixed with fuscous 

 on vertex and mesothorax ; mandibles entirely black ; 

 flagellum very obscurely brownish beneath. Legs black, 

 with white hair, a band of fuscous hair on outer side of hind 

 tibiae ; clypeus strongly punctured and more or less striate ; 

 front dull ; mesothorax roughened and strongly punctured, 

 dull, with the disc somewhat shining ; scutellum rough, but 

 somewhat shining ; area of metathorax sharply defined, 

 strongly striate, produced and pointed in middle behind ; 

 lateral margins of truncation sharply defined ; hind spur 

 appearing simple, its hind margin very feebly microscopi- 

 cally nodukise ; tegulae piceous. Wings smoky hyaline, 

 stigma and nervures dusky ferruginous ; second s.m. very 

 broad, receiving first r. n. well before end ; outer t.-c. and 

 r. n. very Aveak. Abdomen shining, not distinctly punc- 

 tured, lateral basal margins of second and third segments 

 with bands of white tomentum, and a similar band on fourth 

 hidden under margin of third ; apex with fuscous hair ; 

 venter with glistening white hair, but no curled scopa. 

 IMicroseopical characters : — Front striate-punctate ; sides of 

 mesothorax cauccllate, passing in the middle into oblique 

 wave-like rugce ; punctures of second abdominal segment 

 excessively small, nowhere dense. 



Hab. "Windsor, Victoria, 1909" (French; Froggatt 

 coll. 93). 



Resembles H. reproisentans, Sm., but easily known by tlie 

 sculpture of the mesothorax. The microscopical characters 

 and larger size readily separate it from H. gilesi, Ckll. 



Halictus circumdatus, sp. n. 



? . — Length about 8^ mm. 



Black, shining, with tliiu greyish-white hair; mandibles 

 red apically ; fiagcUum dark, with a very faint reddish tint 

 beneath ; small joints of tarsi more or less reddened ; hair 

 of vertex all pale, but that of scutellum and mesothorax 

 mixed with fuscous; head broad; clypeus shining, with 

 strong irregular punctures; front dull in middle, glistening 

 at sides ; mesothorax shining, strongly but not very densely 

 punctured ; scutellum very irregularly ])unctured, some of 

 the punctures very minute, others large, and a median slender 

 groove ; area of metathorax concave, shining, strongly 

 longitudinally plicate, sharp-edged, with the apical marginal 

 area smooth and shining, depressed in middle ; mesopleura 



