1910.] FOSSORIAL WASPS OF AUSTRALIA. 289 



lateral angles near the base but not toothed, thence triangular to 

 the base of the short apical spine. 



Black ; the clypeus, the orbits of the eyes narrowly, broadly 

 interrupted at the summit, the apex of the interantennal 

 prominence, a broad arched band on the pronotum, a quadrate 

 spot on the mesonotum, another on the scutellum. a transverse 

 band on the postscutellum, a spot on the mesopleurse below the 

 anterior wings, the tegulse, a large spot on each side of the six 

 basal dorsal segments of the abdomen and on each side of ventral 

 segments 2-5, yellow ; femora, tibife, and tarsi ferruginous. 

 "Wings hyaline, tinged with yellow, nervures fuscous. 



Length 17 mm. 



$ . Clypeus without a carina ; the mandibles broad and rather 

 stout. Head half as broad again anteriorly as long, strongly 

 rounded at the posterior angles, very slightly convex, thin, 

 shining, very sparsely and finely punctured both on the vertex and 

 front ; a well-marked longitudinal sulcus on the front. Thorax 

 rather closely punctured, the pronotum much more finely than 

 the median segment ; the pronotum nearly twice as broad as 

 long, the sides almost parallel, with a row of long grey hairs on 

 the anterior margin. Median segment no longer than the 

 scutellum, broadened from the base and obliquely truncate 

 posteriorly, the surface of the truncation shining, with a few 

 scattered punctures. Abdominal segments smooth at the base ; 

 the first segment truncate anteriorly, with a row of setigerous 

 punctures above the base of the truncation, the apical margin 

 broadly depressed, leaving a raised mark strongly emarginate in 

 the middle and rounded at the sides before the depression ; second 

 segment with three transverse carinas near the base, the space 

 between the raised apical margin and the carinas indistinctly 

 transversely striated ; third segment depressed at the apex as in 

 the first segment, the raised mark before the depression very 

 sparsely punctured near the apex ; fourth and fifth segments 

 closely punctured at the apex ; fifth ventral segment longi- 

 tudinally and coarsely striated. Pygidium deflexed, very long 

 and narrow, almost vertically truncate posteriorly, compressed 

 and linear before the truncation, the surface of the truncation 

 very narrowly elonga.te-ovate ; the dorsal plate trilobed at the 

 apex ; the ventral plate extending beyond the dorsal and narrowly 

 rounded at the apex. 



Black ; the mandibles at the base, clypeus, scape, vertex, 

 pygidium, the middle of the second dorsal segment, the depressed 

 apical margin of the first and third segments, and the extreme 

 apex of the fourth and fifth f usco-ferruginous ; legs and the whole 

 ventral surface light testaceous brown. A tuft of golden hairs on 

 each side of the pygidium. Basal joint of intermediate tarsi not 

 broadened. 



Length 12 mm. 



Hab. Guildford, W. A. (H. M. Giles), d $ in cop. December. 



" On Leptospermum bloom. Scarce." {Giles.) 

 Proc. Zool. Soc\— 1910, No. XIX. 19 



