1910.] FOSSORIAL WASrS OF AUSTRALIA. 277 



tubercle. Median segment a little shorter than the scutellum, 

 broadened from the base and obliquely truncate posteriorly, 

 closely punctured and thinly covered with long grey pubescence. 

 Abdomen smooth, with a few scattered punctures, the first seg- 

 ment with a deep transverse groove before the apex, the second 

 segment with four strong transverse carina? in addition to the 

 raised apical margin. Fifth ventral segment coarsely punctured- 

 rugose. Pygidium truncate posteriorly, very narrow, the surface 

 of the truncation very narrowly elongate-ovate, about five times 

 as long as the greatest breadth, the lateral margins raised. 



Head and thorax dark ferruginous ; median segment and 

 abdomen black ; a broad band on the first, third, and fourth 

 dorsal segments and the sides of the second segment pale luteous ; 

 anterior and intermediate legs fusco-ferruginous. 



Length 6-9 mm. 



The colour varies much, some specimens being darker than the 

 type. 



Hob. Claremont, W. A. (H.\M. Giles). December and January. 



" On Eucalypttis bloom. Common." 



The absence of a carina on the pronotum is remarkable, 

 separating the female from the nearly allied species. The head 

 is somewhat compressed laterally behind the eyes. 



Epactiothynnus laboriosus, sp. n. 



d . Clypeus convex, produced and rather broadly truncate at 

 the apex. Head finely and very closely punctured ; a very short 

 longitudinal carina between the antenna?, which are inserted 

 further from each other than from the eyes and are a little shorter 

 than the thorax and median segment combined ; the second joint 

 of the flagellum scarcely more than half as long as the third. 

 Pronotum nearly as broad as the head, slightly narrowed anteriorly, 

 the anterior margin a little raised and straight, minutely punctured. 

 Mesonotum and scutellum finely and very closely punctured ; the 

 scutellum rather narrowly truncate at the apex, with a well- 

 marked longitudinal carina on the apical half. Median segment 

 rounded, very finely punctured-rugulose. Abdomen a little 

 longer than the head, thorax, and median segment combined, 

 narrowed at the base, sparsely punctured ; segments 2-5 strongly 

 constricted at the base and depressed on the apical ma,rgin ; the 

 basal segment with a deep sulcus from the base nearly reaching 

 the apex. Hypopygium with a short spine on each side near the 

 base, thence narrowed sharply to the base of the acute apical 

 spine. No spine on the sixth ventral segment. 



Black ; the abdomen, except the base of the first segment, the 

 femora, tibia?, and tarsi ferruginous red ; tegula? testaceous ; 

 base of the mandibles, apical margin of the clypeus, a spot on 

 each side near the middle of the clypeus, the margins of the eyes 

 narrowly as high as the base of the antenna?, and the posterior 

 margin of the postscutellum pale yellowish. An obscure spot 

 on each side of the vertex, near the summit of the eyes, dull 



