1908.] AUSTRALIAN FOSSORIAL WASPS. 509 



Length 5 mm. 



Hah. Mackay, Queensland (^Turner) ; May. 



The antennae are inserted very low down close to the sides of 

 the clypeus. The tubercles at the posterior angles of the pro- 

 notum do not reach the tegulse, differing in this point from 

 typical Xitela. 



PiSOX SOABRUM, Sp. n. 



$ . Clypeus rather more than twice as broad as long ; the 

 anterior margin broadly rounded, narrowly and bluntly produced 

 in the middle, closely punctured and clothed with long greyish 

 pubescence, changing to silver in strong lights. Antennae inserted 

 about as far from each other as from the eyes, as long as the 

 thorax and median segment combined, very slightly thickened to 

 the seventh joint of the fiagellum ; the second joint of the 

 flagellum three times as long as the first and one-third longer 

 than the third. Eyes deeply emarginate, the distance between 

 them on the vertex slightly exceeding the length of the two basal 

 joints of the flagellum combined, the distance between them at 

 the base of the mandibles nearly half as great again as on the 

 vertex. Posterior ocelli nearly half as far again from the eyes 

 as from each other, a little nearer to each other than to the 

 anterior ocellus. Head closely and rather finely punctured, thinly 

 clothed with cinei'eous pubescence ; a short, longitudinal, median 

 carina on the front above the base of the antenna3. Pronotum 

 very short, depressed below the level of the mesonotum. Thorax 

 vshining, closely punctured, with an obscure longitvidinal carina 

 on the scutellum. Median segment not more than two-thirds 

 of the length of the mesonotum, punctui-ed-rugose, without a 

 median carina, with a small shining spot at the apex, truncate 

 posteriorly, with a median sulcus not reaching the apex, and with 

 a few transverse striae at the apex. Abdomen very minutely and 

 closely punctured, the third segment as long as the second, the 

 •apical margin of the segments depressed, with a band of silvery 

 pubescence, the apical segment elongate and very sharply 

 pointed. 



Black ; the tegulse, the apical margin of the fifth abdominal 

 .segment, and the spines of the posterior tibiae fusco-ferruginous. 

 Wings hyaline, faintly tinged with fuscous, a little darker at the 

 apex ; nervures black. 



The recurrent nervures are interstitial with the first and 

 second transverse cubital nervures ; the second cubital cell reaches 

 halfway from the cubital to the radial nervure ; the third cubital 

 cell is more than half as long on the radial as on the cubital 

 nervure. 



Length 15 mm., exp. 25 mm. 



Hah. Mackay, Queensland {Turner). 



This is allied to P. sjnnolce, but differs in the sculpture of the 

 median segment, in the stronger punctures on the head and 

 thorax, and the greater breadth between the eyes. The clypeus 



