1910.] FOSSOR1AL WASPS OF AUSTRALIA. 347 



confluent longitudinally. The triangular space at the base of the 

 median segment is almost smooth in the middle and at the apex, 

 obliquely striated at the basal angles and divided by a deep 

 longitudinal median sulcus. Petiole short, nearly twice as broad 

 as long ; pygidial area elongate-ovate, truncate at the apex, 

 coarsely punctured at the base, smooth at the apex. 



Black; the clypeus, interantennal carina, mandibles, the face 

 as high as the base of the antennae and extending to the eyes, 

 only narrowly separated from the interantennal carina, the scape, 

 flagellum beneath, a broad transverse band narrowly interrupted 

 in the middle on the pronotum, tegulae, a transverse band at the 

 apex of the scutellum, postscutellum, two basal abdominal seg- 

 ments, the dorsal surface of the fifth segment, and the legs bright 

 reddish orange. Wings hyaline, the fore wings clouded with 

 fuscous along the costa, nervures black. 



Length 11 mm. 



c? . Differs from the female in the form of the clypeus which 

 is longer and not emarginate at the apex, the narrower front and 

 the more nearly parallel sides of the pygidial area, which is also 

 more strongly punctured towards the apex. The fifth, sixth, and 

 seventh dorsal segments are orange — not only the fifth, as in the 

 female — and the clypeus and front are yellow. 



Hah. Claremont, W. A. (H. M. Giles). December. 



Cerceris minuscula, sp. n. 



2 . Clypeus rather sparsely punctured, the middle lobe broadly 

 and shallowly emarginate at the apex, not toothed, slightly 

 narrowed towards the apex, a little shorter than the greatest 

 breadth. Antennae separated from the base of the clypeus by 

 about two-thirds of its length; the third joint of the flagellum 

 as long as the second, the apical joint stout and subcorneal, longer 

 than broad. Posterior ocelli more than half as far again from 

 the eyes as from each other; inner orbits of the eyes nearly 

 parallel, separated by a distance equal to more than two and 

 a half times the length of the scape. The whole insect closely 

 and deeply punctured, the triangular space at the base of the 

 median segment transversely striated. Petiole broader than 

 long, narrowed a little to the base and the apex ; pygidial area 

 elongate-ovate, narrowly rounded at the apex, finely punctured. 



Black ; mandibles (except at the apex), clypeus, the sides of the 

 face broadly as high as the base of the antennae, the scape beneath, 

 the frontal carina, a transverse spot on each side of the pronotum , 

 postscutellum, the sides and apex of the third dorsal segment of 

 the abdomen, the sides of the third ventral segment, and the sides 

 and apex of the fifth dorsal segment, pale dull yellow ; the scape 

 above, the flagellum, tegulae, petiole, the extreme apical margin 

 of the second dorsal segment, the base of the third, and the 

 pygidium, dull ferruginous. Intermediate and anterior tibiae 

 yellow above, posterior tibiae yellow beneath ; intermediate and 

 anterior femora, the apex of the posterior femora, the tibiae 



