1910.] FOSSORIAL WASPS OF AUSTRALIA. 301 



hypopygium is much more broadly triangular, with the basal 

 angles rounded and not produced into lobes. 



2 • Anterior margin of the pronotum more strongly emar- 

 ginate ; intermediate tibia? thicker, very broad, though they are 

 considerably thickened in novarce ; pygidium strongly constricted 

 at the base of the truncation, the surface of the truncation very 

 broadly ovate, nearly as broad in the middle as long ; the apical 

 half smooth, the basal half marked with five A-shaped carina? as 

 in novarce. 



Length, c? 15 mm., 2 12 mm. 



Hah. New South Wales (Staudivger). Types in B. M. ex 

 coll. Turner. A female in the Berlin Museum. 



The species in this group are very closely allied, Z. novarce 

 being intermediate between pseustes Turn, and neylectus. 

 Z. pseustes has the clypeus yellow and less strongly sculptured in 

 the male, wliile the pygidium of the female has lateral lobes near 

 the apex and is a more slender insect. 



Z. dilatatus Sm. is also closely allied, the intermediate tibia? 

 of the female being much thickened and the truncation of the 

 pygidium broad as in neglectiis, but the pygidium is not contracted 

 before the truncation. 



Zaspilothynnus nigripes Guer. 



Thynnoides nigripes Guer. Mag. de Zool. xii. p. 10 (1842), tf . 



S . Clypeus punctured-rugose, moderately convex, the apical 

 margin straight but not very broad ; antenna? as long as the 

 thorax without the median segment, of even thickness through- 

 out ; the interantennal prominence bilobed. The whole insect 

 closely punctured, with sparse greyish-white pubescence. Median 

 segment not truncate, broad, with an obscure median sulcus. 

 Abdomen elongate; segments 2-5 with an impressed transverse 

 line near the base, the base of the segments before the line almost 

 smooth. Second ventral segment with a tubercle at the base ; a 

 spine on each side at the apical angles of the sixth ventral 

 segment. Seventh dorsal segment without a produced flattened 

 plate, the basal portion marked with strong rounded stria?, the 

 apex strongly clefiexeol and transversely striated. Hypopygium 

 elongate-triangular, with prominent basal angles, the apical spine 

 feebly recurved. 



Black. Wings hyaline faintly flushed with purple, nervures 

 black. 



Length 20-22 mm. 



2 . Clypeus without a carina ; head and pronotum deeply but 

 rather sparsely punctured, more closely on the front ; head 

 moderately thick, much broader than long ; the eyes separated 

 from the base of the mandibles by nearly half their own length. 

 Pronotum subrectangular, slightly narrowed posteriorly, nearly 

 twice as broad as long, the punctures on the anterior margin 

 deep and setigerous. Scutellum sparsely punctured ; median seg- 

 ment minutely and closely punctured, with a few large scattered 



