BY ROWLAND E. TURNER. 241 



with a strong prominence on each side at basal angles, thence 

 narrowed and produced to apical spine. 



Hob. — Swan River (Smith). 



9. Head shining, very finely and sparsely punctured, broader 

 than long and broader than thorax, moderately convex, eyes 

 situated at some distance from base of mandibles, a deep depres- 

 sion on each side reaching from eye to base of antenna, front 

 with a deep, longitudinal, median sulcus. Thorax, median seg- 

 ment and abdomen very sparsely punctured; pronotum almost 

 rectangular, half as broad again as long; median segment short 

 and broad, rather abruptly truncate posteriorly. First abdominal 

 segment vertically truncate anteriorly, apical margin slightly 

 raised, with a narrow groove before it; second segment with 

 eight or nine rather irregular transverse carinse; fifth ventral 

 segment longitudinally striated. Pygidium oblique, vertically 

 truncate posteriorly, a little contracted and longitudinally striated 

 before the truncation, surface of truncation smooth and broadly 

 oval. Head, thorax, median segment and legs ferruginous; 

 abdomen black; a transverse band on first segment above trun- 

 cation, a spot on each side of second, and an interrupted trans- 

 verse band on third, fourth and fifth segments yellow. Length 

 14 mm. 



Type Q, in Oxford University Museum, ex Coll. Saunders. 



200. T. constrictus Sin. 



Thynnus constrictus Sm., Cat. Hym.B.M. vii.p.l9,n.35,1859( ( J). 



(J. Clypeus produced and rather broadly truncate at apex, 

 sparsely and deeply punctured, connected by a narrow carina 

 with the interantennal prominence, which is broadly rounded at 

 apex: front of head punctured-rugose, vertex sparsely punctured. 

 Pronotum short and broad, almost smooth, anterior angles pro- 

 duced; mesonotum and scutellum closely punctured. Median 

 segment broad, rounded at sides, finely rugulose, almost smooth 

 at base. Abdomen fusiform, shallowly and sparsely punctured, 

 the segments constricted at base. Second ventral segment sub- 

 tuberculate at base. Hypopygium with a tooth on each side 

 19 



