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neuration black, very distinct. Tibiae dilated apically, and 

 grooved or hollowed above for the partial reception of the three- 

 jointed tarsi, when these are drawn up. 



1. Halictophagus (Bnicsia) aiistralcnsis, sp. nov. 



Black or blackish fuscous, the thorax paler, piceous or brown- 

 ish, the lamellate joints of the antennae also paler, yellowish or 

 sordid testaceous. Wings smoky hyaline, with slight but evi- 

 dent iridescence, the neuration strong, black. Apical abdominal 

 segment with its genital process concave above and much pro- 

 duced, towards the base with an upright tongue-shaped, pilose 

 organ; in lateral view the sides are slightly convergent to the 

 apex, which is armed with a recurved hook, the tip of which is 

 itself bent upwards; in front of the origin of this uncus the pro- 

 cess has a small deep emargination. The apical ventral segment 

 is triangular and produced at the apex. The abdomen is cloth- 

 ed with a very delicate cinereous pubescence. Expanse about 

 4 mm. 



Female. Head yellow or brownish yellow, distinctly rounded 

 at the sides, with a distinct anterior median area (or plate) mark- 

 ed out, and slightlv produced; tuberculate on either side of this 

 area in front. The opening of the brood-chamber is behind the 

 middle of the exposed part of the head, the surface between this 

 opening and the apexsubconvex. Length about Vs mm. 



(Plate I, figs. 3, 5 and 9; Plate II, figs, i, 7, g and 12; PI. Ill, 

 fig. 8 and 9.) 



Hab. Cairns, Queensland, parasitic on a ver}' common and 

 conspicuous species of Tcffigoiiia. many parasitized examples 

 being taken by us. (No. 2238). 



2. Halicfophagiis (Bnicsia) phacodcs, sp. nov. 



Female. Head broader than long, brown, more yellowish in 

 front and darker behind the opening of the brood chamber, 

 strongly rounded at the sides, the anterior median area defined 

 and slightly produced, tuberculate on either side of this area in 

 front; the surface slightly convex between the opening of the 

 brood-chamber and the apex. Length about ^ mm. 



(Plate III, fig. 3). 



Hab. Cairns, Queensland; one female specimen parasitic on a 

 common green flat-headed Jassine of the genus Hccalus. 



