1910.] FOSSORIA.L WASPS OF AUSTRALIA. 285 



into two equal portions by a transverse carina, the basal half 

 sparsely punctured, the apical half depressed and finely aciculated ; 

 second segment with three transverse carina? at the base, followed 

 by two more broadly interrupted in the middle, then broadly 

 depressed to the apex, the apical margin raised. Pygidiuin almost 

 vertical, long and narrow, longitudinally striated near the base, 

 compressed near the middle and smooth at the apex. Fifth 

 ventral segment coarsely rugose. 



Black ; the mandibles at the base, the apex of the scape, thorax, 

 median segment, and legs ferruginous red ; the apex of the 

 pygidium testaceous ; flagellum fuscous. 



Length 9 mm. 



Hab. Ararat, Victoria. 



Type in the Berlin Museum. 



Thynkoides nephelopterus, sp. n. 



<$ . Clypeus large, produced and very broadly subeinarginate at 

 the apex, rather sparsely punctured, some of the punctures con- 

 fluent longitudinally ; the labrum projecting and very shallowly 

 emarginate at the apex. Head very closely and finely punctured, 

 the front punctured-rugose ; the interantennal prominence very 

 broadly rounded at the apex, connected by a short carina with the 

 base of the clypeus, divided by a short, fine, longitudinal carina. 

 Antennae inserted a little further from each other than from the 

 eyes, as long as the thorax without the median segment, very 

 slightly slenderer at the apex than in the middle. Thorax finely 

 and closely punctured, more sparsely on the scutellum ; pronotum 

 with the anterior margin a little raised, the anterior angles some- 

 what prominent ; scutellum very broadly rounded at the apex. 

 Median segment rounded at the sides, obliquely depressed from 

 near the base, very finely punctured rugulose. Anterior coxae 

 strongly concave beneath. Abdomen fusiform; segments 2-5 

 slightly constricted at the base, the segments very finely and 

 closely punctured at the base, a little more strongly and sparsely 

 at the apex ; seventh dorsal segment rugulose, rounded at the 

 apex, without a flattened plate ; sixth ventral segment without 

 spines. Hypopygium with a prominent tooth on each side at the 

 basal angles, thence elongate-triangular to the base of the apical 

 spine, with a few transverse striae on the dorsal surface. The 

 groove between the two basal segments is deep, the second seg- 

 ment is without a tubercle at the base. 



Black ; the mandibles (except at the apex) and the clypeus 

 (except a fuscous spot on each side near the apex) orange-yellow ; 

 wings fusco-hyaline, nervures black. 



The second recurrent nervure is received just beyond one- 

 quarter from the base of the third cubital cell. 



Length 13-19 mm. 



5 . Clypeus without a carina ; mandibles falcate. Head 

 strongly convex, nearly as long as the breadth on the anterior 

 margin, much narrowed posteriorly, shining, with a few small 



