BY ROWLAND E. TURNER. 191 



135. T. (Lophocheilus 1 ?) OPPOSITUS Sm. 

 Thynnus oppositus Sm., Descr. n.sp. Hym.p.162, n.12, 1879( C J). 



$. Clypeus broadly truncate anteriorly, very finely and closely 

 punctured, a very delicate carina from base not reaching middle. 

 Head, thorax and median segment very finely and closely punc- 

 tured; a short, delicate, longitudinal carina below anterior 

 ocellus. Abdomen shining, finely and shallowly punctured, 

 segments not constricted; first segment truncate anteriorly, with 

 a large blunt tubercle above truncation. Hypopygium with 

 basal angles slightly prominent, thence broadly produced, rounded 

 at apex, with an acute apical spine. 



Hah.— Swan River, W.A.(Smith). 



136. T. (Lophocheilus) apterus Oliv. 



Myzine aptera Oliv., Encycl. Method. Insect, viii. p. 137, n.7, 

 1811(5). 



Thynnus variabilis Kirby, Trans. Linn. Soc. Lond. xii. p. 47 6, 

 1818(<J$); Leach, Journ. de Physique, lxxxviii. p.178; n.2, 1819 



Myrmecodes flavoguttatus Latr., Nouv. Diet. Hist. Nat. Ed.2 a , 

 xxii. p.143, 1819(9). 



Thynnus olivieri Erichs., Arch. f. Naturg. viii.P.l,p.262, n.235, 

 1842(5$). 



Myrmecodes olivieri Lepel., Hist. Nat. Insect. Hym. iii. p.588, 

 n.2, 1845(9). 



Var. Thynnus auddx Sm., Trans. Ent. Soc. Lond. 1868, p.234, 

 p.6(<J). 



This is a common and exceedingly variable species. As far as 

 I can see, the markings on the male are of no value for specific 

 distinction, though it is possible that a long series would show 

 that some of the variations are more or less local. T. audax Sm., 

 is a variety in which the usual black groundcolour is replaced by 

 ferruginous, and the yellow markings by a lighter shade of 

 ferruginous. A fine variety from Queensland in Mr. Froggatt's 



