60 HYMENOPTERA. 



piceous, margins of the segments palest, towards the apex co- 

 vered with a short silvery pubescence. 

 Hab. Van Diemen's Land. (Coll. J. S. Baly, Esq.) 



77- HALICTUS REPR^ESENTANS, n. s. B.M. 



Female. Length 4 lines. Black, head closely punctured, 

 the antennae nigro-piceous towards their apex. Thorax, the disk 

 closely and moderately punctured ; at the base of the metathorax 

 a somewhat concave space, enclosed by an arched elevation, sub- 

 sinuated at the sides, the space covered by smooth radiating 

 grooves ; wings subhyaline, the nervures and stigma ferruginous; 

 the legs covered above with a pale pubescence, which has in cer- 

 tain lights a silvery brightness; the tarsi beneath fulvous, the 

 apical joints ferruginous. Abdomen ovate, shining, very closely 

 and finely punctured ; on the basal margins of the second, third 

 and fourth segments a snow-white band, the two first interrupted 

 and forming lateral angular patches of downy pubescence, the 

 anal rima ferruginous. 



Male. Has a general resemblance to the female ; neuration of 

 the wings the same, the whole insect thinly sprinkled with griseous 

 pubescence, dense and white on the face and shoulders ; apex of 

 the clypeus white ; the base of the metathorax is finely longitu- 

 dinally rugose ; abdomen somewhat globose in appearance from 

 being incurved, the pubescence thicker on the basal margins of 

 the segments, but not forming patches or decided fasciae. 

 Hab. New Holland ; Van Diemen's Land. 



Obs. This species very closely resembles the H. leucozonius of 

 Kirby, but differs in the sculpture of the metathorax, and also in 

 having the second submarginal cell broader. From an examina- 

 tion of a large number of this apparently abundant species, it is 

 found to vary in the grooving of the enclosed space at the base 

 of the metathorax, the grooving not being always smooth or 

 equally deeply sculptured ; the abdominal fasciae are frequently 

 nearly obsolete, in others broader, sometimes narrower ; thus in 

 its varieties resembling those of the H. leucozonius. The male 

 is united, from the fact of their having been received together 

 from both localities on numerous occasions. 



78. HALICTUS PROPINQUUS, n. s. B.M. 



Male. Length 3-3! lines. Bronze-green, closely and finely 

 punctured, extreme apex of the clypeus yellow, antennae fulvous 

 beneath ; the face has a hoary pubescence, the clypeus produced, 

 shining and strongly punctured. Thorax clothed in front as 



