1910.] FOSSORIAL WASPS OF AUSTRALIA. 295 



Tachynothynnus picipes Westw. 



Thynnus picipes Westw. Arc. Ent. ii. p. 114 (1844), 6 • 



Specimens of the male sent by Mr. Giles have the legs black 

 and the wings rather darker than in the typical form. One 

 specimen has the apex of the first abdominal segment dull 

 ferruginous. 



2 . Mandibles stout, acute at the apex, with a small tooth near 

 the middle of the inner mai"gin. Clypeus without a carina. 

 Head coarsely punctured on the front, the punctures piliferous, 

 smooth and shining on the vertex, nearly half as broad again as 

 long, the posterior angles rounded, slightly narrowed anteriorly, 

 scarcely convex. Pronotum nearly as broad as the head, more 

 than half as broad again as long anteriorly, a little narrowed 

 posteriorly, the anterior margin not quite straight, very shallowly 

 emarginate, sparsely punctured on the sides, smooth in the middle, 

 a, row of large setigerous punctures along the anterior margin. 

 Scutellum and median segment sparsely punctured, the median 

 segment as long as the scutellum, broadened from the base and 

 almost vertically truncate posteriorly. First dorsal segment of 

 the abdomen coarsely punctured-rugulose, the apical margin a 

 little raised, with a broad groove before it ; second segment with 

 about eight transverse carinas including the raised apical margin, 

 those near the base lower, the apical margin with a very broad 

 groove before it ; segments 3-5 shining, sparsely punctured at 

 the apex. Pygidium obliquely defiexed, narrow at the base, 

 gradually broadened to the apex, elongate-triangular, with strong 

 transverse carinas, slightly arched ; the ventral plate rounded at 

 the apex and expanding on each side of the dorsal. A tuft of 

 hairs on each side springing from below the apex of the fifth 

 segment. Fifth ventral segment rugose, with oblique curved 

 strife at the apex. Intermediate tibiae thick and spinose, basal 

 joint of intermediate tarsi not flattened. 



Black ; head, middle of the pronotum, second abdominal seg- 

 ment, and the spines of the tibias and tarsi f usco-f erruginous. 



Length 14 mm. 



Hab. Oottesloe, near Fremantle, W. A. (H. M. Giles). <3 $ in 

 cop. December. 



" On Eucalyptus bloom." 



The female, as would be expected, is near the shuckardi group. 



POGONOTHYNNUS (?) WALKERI Turn. 



Thynnus walkeri Turn. Proc. Linn. Soc. N.S.W. xxxiii. p. 236 

 (1908), d. 



2 . Clypeus without a carina. Head finely and sparsely punc- 

 tured, shining, with a short, longitudinal, frontal sulcus, slightly 

 convex, half as broad again as long. Pronotum as broad as the 

 head, nearly twice as broad as long, the sides almost parallel, 

 smooth and shining, with a few minute scattered punctures and 

 a, row of deeper setigerous punctures along the straight anterior 



