1910.] FOSSOltlAL WASPS OF AUSTRALTA. 287 



line on each side between the antennae, a narrow transverse band 

 broadly interrupted in the middle on the pronotum, and two spots 

 on the tegula?, yellow ; a short transverse band broadly interrupted 

 in the middle on dorsal segments 2-5 ferruginous brown, tinged 

 with yellow on the second and third, very obscure on the fifth 

 segment ; the base of ventral segments 2-5 narrowly f usco-fer- 

 ruginous. Wings hyaline washed with fuscous, nervures black. 



Anterior tibia? beneath f usco-ferruginous. 



Length 20 mm. 



2 . Clypeus without a carina. Head nearly rectangular, 

 slightly rounded at the posterior angles, a little convex, broader 

 than long by about one-quarter, smooth and shining, with a short, 

 longitudinal frontal sulcus. Pronotum more than half as broad 

 again anteriorly as long, a little narrowed posteriorly, very sparsely 

 and finely punctured, with larger setigerous punctures on the 

 anterior and lateral margins, the anterior margin very broadly 

 and shallowly emarginate, the anterior angles prominent and sub- 

 tuberculate. Scutellum and median segment sparsely punctured ; 

 the scutellum not very narrow; the median segment a little 

 shorter than the scutellum, broadened from the base and almost 

 vertically truncate posteriorly. First abdominal segment truncate 

 anteriorly, the dorsal surface divided into, two almost equal parts 

 by a transverse carina ; the basal portion coarsely but rather 

 sparsely punctured, the apical portion depressed and almost 

 without punctures, the apical margin slightly raised ; second 

 segment with five strongly raised transverse carina? including the 

 raised apical margin ; segments 3-5 smooth at the base, coarsely 

 but sparsely punctured at the apex ; fifth ventral segment coarsely 

 longitudinally striated. Pygidium sharply deflexed, long and 

 almost linear, slightly broadened at the apex into a narrow, 

 elongate-ovate surface ; both the dorsal and ventral plates very 

 narrowly rounded at the apex ; a tuft of golden hairs on each side 

 near the base. 



Black ; the thorax and median segment ferruginous red ; the 

 mandibles at the base, the apex of the scape, and the anterior 

 tibia? and tarsi beneath ferruginous. 



Length 11 mm. 



Hob. South Perth, W. A. {H. M. Giles), d 2 in cop. 

 February. 



" Eucalyptus bloom. Rare, only one pair seen." (Giles.) 



This is not very close to typical Thynnoides, the male being 

 without the concave coxa?. It is perhaps nearer to the melleus 

 group. 



Campylothynnus assimilis Sm. 



Thynmts assimilis Sm. Cat. Hym. B. M. vii. p. 20 (1859), $ . 

 Thynnus flavofasciatus Sm. Oat. Hym. B. M. vii. p. 45 

 (1859), 2- ' 



Hub, South Perth, W. A. (H. M. Giles). S 2 in cop. 

 This species is most nearly allied to T.flavopictus Sm. 



