306 Mr. T. D. A. Cockcrcll — Descriptions and 



small and narrow, receiving the first recurrent nervure a 

 little before its end; third with an appendicular apical point. 

 Tarsi and knees red, and tibise largely so ; basal joint of hind 

 tarsi very broad and flat ; abdomen shining, but strongly and 

 quite closely punctured, hind margins of segments 1 to 4 

 broadly depressed and fulvous, those of segments 2 to 4 with 

 bands of golden-orange appressed hair ; fifth segment Avith a 

 redder band. 



It is not altogether impossible that this may be the ? of 

 AL rufocognita, Ckll., but in that species {S) the middle of 

 the mesothorax is densely punctured all over, and the first 

 abdominal segment is much more coarsely and closely 

 punctured. The enclosure of the metathorax in rufocognita, 

 though a mere line laterally, is divided by little ridges, 

 which makes it look beaded ; this is not at all the case in 

 semiaurea. 



Hab. Queensland {Gilbert Turner) ; two, both labelled 

 Ridg. 4.91 and 617. 



From the description, this must be near to Nomia cincta, 

 Smith, discovered by Wallace on Great Key Island. 



Nomia halictella, sp. n, 



? . — Length about 8^ mm. 



Looking very much like a small Halictus calceatus ; the 

 shining, fulvous-banded abdomen broad in the middle and 

 narrowing basally, so that in some positions it looks sub- 

 clavate. Black, with rather light ochreous pubescence ; 

 head broad, eyes strongly converging below ; mandibles 

 dark reddish in the middle; antennpe dark, the flagellum 

 red at apex ; median raised line extending downwards only 

 to level of antennse ; front below ocelli delicately striatulate ; 

 mesothorax dull, very minutely and closely punctured, 

 appearing quite hairy when seen from the side, but not so 

 when seen from above, except at the extreme lateral margins, 

 and at the scutello-mesothoracic suture, which is full of 

 ochreous tomentum ; upper border of prothorax, tubercles, 

 and postscutellum covered with ochreous tomentum ; basal 

 area of metathorax very narrow (short), with numerous very 

 fine cross-ridges j posterior face of metathorax dull and 

 granular, bounded laterally by a ridge only below ; tegulae 

 shining rufous, fuscous basally. "VYings sti^ongly dusky ; 

 stigma and nervures light dull brown, stigma large ; 

 marginal cell very blunt and broadly rounded at apex ; first 

 submarginal cell longer than third ; second quite large, 

 somewhat broader than high, receiving the first recurrent 



