BY ROWLAND E. TURNER. 157 



narrower anteriorly than in the specimens I have seen from the 

 mainland. The true limits of variable species such as the present 

 one can only be ascertained when long series of both sexes are 

 available, with full data as to locality and the pairs taken 

 together. 



Hab. — Adelaide, S.A., to Cairns, Q. 



86. T. (Agriomyia) vividus Sm. 



Thynnus vividus Sm , Descr. n.sp. Hyin. p.161, n.ll, 1879((J). 



This is very near T. maculatusv&r. odyneroides, but the clypeus 

 is a little more produced, the scutellum is longer, and the abdomen 

 is strongly punctured, the punctures not confluent. 



Hab. — Swan River, W. A. (Smith). 



87. T. (Agriomyia) jucundus Sm. 



Thynnus (Agriomyia) jucundus Sm , Cat. Hym. B.M. vii. p.25 r 

 n.64, 1859((J). 



This is extremely near T. maculatus, but the whole insect is 

 much more feebly sculptured. The yellow marks on the abdo- 

 men are larger and extend to the sixth segment. The known 

 specimens are smaller. 



Hab. — Australia, N. W. Coast. 



88. T. (Agriomyia) medius Sm. 



Thynnus medius Sm., Descr. n.sp. Hym. p. 170, n.32, 1879((J). 



£. Clypeus advanced and narrowly truncate at apex, closely 

 punctured. Head and thorax very closely punctured; median 

 segment finely rugulose. Abdomen fusiform, shallowly punc- 

 tured, the punctures large; segments 2-5 faintly depressed on 

 the apical margin, with a slightly raised curved mark on each 

 side reaching almost to apex; a strongly impressed transverse 

 line near base of segments 2-4. Hypopygium rounded, with an 

 apical spine. Abdomen beneath strongly punctured; first seg- 

 ment with a strong tubercle at apex, deeply separated from 

 second segment. 



