1908.] AUSTRALIAN FOSSORIAL AVASPS. 463 



the second cubital cell is not pointed on the radial nervure, being 

 •about one-third as long on the i-adial as on the cubital nervure. 



Length 5-6 mm. 



Hah. Mackay, Queensland {Turner) ; September-December. 

 Described fi-om two specimens. 



This is a much slenderer species than H. steindachneri and is 

 much less coarsely sculptured. The pronotum is less depressed 

 and has the anterior angles strongly prominent, in these characters 

 showing an approach to the genus Sjnlomena. 



PSENULUS INTERSTITIALIS Cam. (Plate XXYI. fig. 4.) 



Psenulus inter stiticdis Cam. Tijdsch. v. Ent. xlix. p. 222, 1906. 



Psen. lutescens Turner, Ann. & Mag. Nat. Hist. (7) xix. p. 273, 

 1907. 



Hah. Etna Bay, JSTew Guinea ; Mackay and Cairns, Queensland. 



I have not seen Camei'on's type, but his description is quite 

 sufficient. 



Ammophila clavus Fab. 



Sphex clavus Fab. Syst. Ent. p. 348. n. 12, 1775. 



$ . Mandibles quadridentate ; clypeus shining, very sparsely 

 punctured, with a few coarse black hairs, a broadly triangular, 

 oblique truncation at the apex, the apical margin very feebly and 

 rather broadly emarginate in the middle. Second joint of the 

 flagellum half as long again as the first and third combined. 

 Eyes parallel on the inner margins ; the posterior ocelli nearly 

 half as far again from the eyes as from each other. Head opaque, 

 finely punctured ; a fine, impressed and slightly curved, transverse 

 line behind the posterior ocelli ; the front concave, with a delicate 

 sulcus from the anterior ocellus, clothed with rather sparse greyish 

 pubescence. Pronotum and mesonotum coarsely transversely 

 striated, the posterior half of the mesonotum with oblique strife 

 ■converging towards the middle of the posterior margin. Scutellum 

 longitudinally striated ; the mesopleurae and metapleurfe vertically 

 striate-rugose. Median segment transversely striated, the striee 

 somewhat oblique, the middle of the segment coarsely reticulate 

 and rather strongly convex at the base ; the extreme apex of the 

 segment with a little short, pale, fulvous pubescence. Abdomen 

 shining, the four apical segments pruinose ; the petiole two-jointed, 

 equal in length to the jDosterior tibia and basal joint of the tarsus 

 combined. Tarsal ungues simple, without a pad ; the comb of 

 the anterior tarsi with four slender sjDines on the outer margin of 

 the basal joint, excluding those on the apical process. 



Black ; the mandibles in the middle fusco-ferruginous ; the 

 scape and two basal joints of the flagellum, the tegulfe, the legs 

 (except the coxpe and spines of the tarsi), the petiole and the first 

 following segment of the abdomen bright ferruginous ; the base 

 of the second joint of the petiole black ; the four apical segments 

 steel-blue. "Wings pale flavo-hyaline, lighter at the apex, nervures 

 testaceous. 



Proc. Zool. Soc— 1908. Xo. XXX. 30 



