166 REVISION OF THE THYNNIL\E OF AUSTRALIA, II., 



100. T. (Agriomyia) IRREGULARIS Smith. 

 Thynnus irregularis Sm., Descr.n.sp.Hym.p.l62,n.l3 1 1879( ( J). 



(J. Clypeus produced and very narrowly truncate at apex; 

 head, pronotum and median segment finely and closely punctured; 

 mesonotum more coarsely punctured ; median segment short, 

 depressed and rounded. Abdomen smooth, with a few scattered, 

 minute and shallow punctures; fusiform, the basal segment not 

 much narrowed; the two apical segments rugose. Hypopygium 

 elongate-triangular. First ventral segment separated by a groove 

 from second, shallowly truncate and subtuberculate at apex. 

 Wings hyaline, faintly tinged with fuscous, nervures fusco- 

 ferruginous. 



Hab. — Swan River (Smith). 



101. T. (Agriomyia) laevifrons Sm. 

 Thynnus Icevifrons Sm., Cat.Hym.B.M.vii.p.45,n. 130,1859(9). 



£. Head flattened, shining, with a few small and scattered 

 punctures, much broader anteriorly than long, strongly narrowed 

 posteriorly. Thorax shining, very sparsely punctured; pronotum 

 subrectangular, half as long again as broad, anterior margin with 

 a few setigerous punctures and a deep sulcus extending to middle 

 of segment; sides of prothorax slightly concave. Median seg- 

 ment finely and more closely punctured, obliquely truncate pos- 

 teriorly, rounded at angles above truncation. First abdominal 

 segment rather strongly punctured, the apical margin very slightly 

 raised, with a broad transverse groove before it; second segment 

 with five transverse carina?, including the raised apical margin; 

 the following segments rather closely punctured. Fifth ventral 

 segment coarsely punctured. Pygidium ovate with a low longi- 

 tudinal carina. Black; head piceous; antennae, mandibles and 

 legs fusco-ferruginous. Length 9 mm. 



Hab. — S. E. Australia (Stutchbury). 



