1910.] FOSSORIAL WASPS OF AUSTRALIA. 337 



S similar to $ . 



Length, $ 8 mm., 3 5 mm. 



Hab. Mackay, Q. [Turner). January. 



A very distinct species, differing from other Australian species 

 in the absence of the tarsal comb, the long median segment, and 

 the pointed second cubital cell. 



Planiceps umbraticus, sp. n. 



$ . Olypeus produced over the mandibles, twice as broad as 

 long, very broadly rounded, subtruncate at the apex. Eyes 

 reaching to the base of the mandibles ; posterior ocelli far apart, 

 nearly twice as far from each other as from the eyes. Antennae 

 only a little longer than the thorax without the median segment ; 

 the third joint of the flagellum almost as long as the second ; the 

 insertion of the antenna? distinctly higher than the base of the 

 eyes. Pronotum as long as the mesonotum, a little narrowed 

 anteriorly. Median segment half as long again as broad, depressed 

 in the middle at the apex, the apical angles acutely produced. 

 Abdomen subsessile, elongate. Fore femora not swollen, posterior 

 tibiae spinose. Two cubital cells, the second receiving the two 

 recurrent nervures near the base and near the apex ; second 

 abscissa of the radius two and a half times as long as the first ; 

 the submedian cell shorter than the median ; cubitus of the hind 

 wing originating well beyond the transverse median nervure. 

 Very minutely punctured, the abdomen and head slightly shining. 



Black ; the antennae fuscous. Wings very pale flavo-hyaline, 

 nervures black. 



Length, $ 7 mm., <$ 5 mm. 



Hab. Mackay, Q. (Turner). 



The head is flattened as in the genus Planiceps, and the long 

 pronotum removes the species from the group of Aporus most 

 nearly allied to typical Pompilus. The anterior tarsi are without 

 a comb. 



Planiceps aureovestitus, sp. n. (Plate XXXII. fig. 9, 2 •) 



$ . Clypeus short, about three times as broad as long, the 

 apical margin transverse. Eyes not nearly reaching the base of 

 the mandibles, slightly convergent towards the vertex ; ocelli in 

 a wide triangle, the posterior pair further from each other than 

 from the eyes. Antenna? about as long as the thorax and median 

 segment combined, inserted a little higher than the base of the 

 eyes ; the second and third joints of the flagellum about equal in 

 length. Pronotum as long as the mesonotum and almost as broad 

 as the head, feebly rounded at the anterior angles, the posterior 

 margin widely arched. Median segment broader than long, 

 obliquely truncate posteriorly, with a deep sulcus on the surface 

 of the truncation. Abdomen subsessile ; the first segment as 

 long as the breadth at the apex, the second segment longer than 

 the first and slightly broader. Fore femora only slightly thicker 

 than the intermediate, basal joint of the fore tarsi longer than 

 the three following joints combined. Two cubital cells, the second 

 Proo. Zool. Soc— 1910, No. XXII. 22 



