BY ROWLAND E. TURNER. 195 



Nab — Sydney to Brisbane. 



I sink T. molitor as the female of T. simillimus with very little 

 hesitation, though I do not know that they have been taken 

 coupled. Both sexes of the West Australian species T. insignis 

 Sm., are very nearly related to this species. T. molitor cannot 

 be the female of T. klugii Westw., as suggested by Smith, the 

 localities being widely different; also the real female of T. klugii 

 is now in the British Museum Collection. 



142. T. (Macrothynnus) insignis Sm. 



Thynnus insignis Sm., Cat. Hym. B.M. vii. p.15, n.ll,1859((J). 



(J. Clypeus broadly truncate at apex, sparsely punctured, with 

 obscure, arched, transverse rugae. Head, thorax and median 

 segment with dense pubescence, that on the front, pronotum and 

 disc of mesonotum fulvous, elsewhere grey. Head finely and 

 very closely punctured, mesonotum rugose. Median segment 

 almost vertically truncate from postscutellum. Abdomen smooth 

 and shining, broadest at base. Hypopygium slightly prominent 

 at the basal angles, thence very broadly subtriangular to base of 

 the small apical spine. 



Q. Head half as broad again as long, strongly rounded at pos- 

 terior angles, shining, sparsely and deeply punctured, most 

 closely between antennae; clypeus with a short carina at its base, 

 anterior margin straight. Pronotum smooth, anterior margin 

 straight, with a row of deep punctures, about twice as broad as 

 long, a little narrowed posteriorly and broadly emarginate. 

 Mesonotum and median segment sparsely punctured, median 

 segment widened from base, almost vertically truncate posteriorly. 

 Abdomen large, very sparsely punctured; first segment vertically 

 truncate anteriorly, apical margin raised, with a broad groove 

 before it, giving the appearance of a transverse carina before 

 apex; second segment with the apical margin raised, with a 

 broad groove before it, the rest of the segment occupied by about 

 ten broken and irregular, low, transverse carinae between two 

 more elevated carinse. Pygidium vertically truncate posteriorly, 

 smooth and shining at base, with strong, curved striae above base 



